PHP isn't installed

rdan · Feb 24, 2019

CentOS Version: CentOS 7 64bit

Centmin Mod Version Installed: 123.09beta01

PHP Version Installed:7.3.2

MariaDB MySQL Version Installed: 10.3

Persistent Config

Install Log: https://gist.github.com/draft1/a770...7760f400a3852676f59d7ce339e2b8e/gistfile1.txt

eva2000 · Feb 24, 2019

what web host ? plan ? server specs ? kvm/xen/openvz ? output for
Code (Text):
lscpu
cat /proc/cpuinfo
sounds like vps server with cpu where virtualisation host node isn't passing correct cpu flags to vps container/guest OS maybe as i see at PHP make stage
Code (Text):
I/svr-setup/php-7.3.2/TSRM -I/svr-setup/php-7.3.2/fpm-build/    -I/usr/include -O3 -m64 -march=core-avx2 -pipe -gsplit-dwarf -fvisibility=hidden -DZEND_SIGNALS    -c /svr-setup/php-7.3.2/ext/opcache/Optimizer/pass1_5.c -o ext/opcache/Optimizer/pass1_5.lo
/svr-setup/php-7.3.2/ext/opcache/zend_accelerator_util_funcs.c: In function ‘zend_accel_load_script’:
/svr-setup/php-7.3.2/ext/opcache/zend_accelerator_util_funcs.c:656:2: error: unknown register name ‘%ymm1’ in ‘asm’
  __asm__ volatile (
  ^
/svr-setup/php-7.3.2/ext/opcache/zend_accelerator_util_funcs.c:656:2: error: unknown register name ‘%ymm0’ in ‘asm’
make: *** [ext/opcache/zend_accelerator_util_funcs.lo] Error 1
make: *** Waiting for unfinished jobs....
though i saw that in PHP 7.3.0 alpha 1 bug https://community.centminmod.com/threads/php-7-3-0-alpha-1.14931/#post-64092

though also check for bug reports for PHP 7.3 https://bugs.php.net/search.php?lim...d=display&status=Open&bug_type=All&phpver=7.3

eva2000 · Feb 24, 2019

Actually i put in place a work around for this back on June 23, 2018 https://github.com/centminmod/centm...d9d13b2#diff-01287bb69c66cf973b36ce5380d36a72 (listed in inc/php_configure.inc commit history logs)

PHP 7.3.0 alpha compile workaround fix

PHP 7.3 enables further AVX instructions and CentOS 7, GCC 4.8.5 compiler target recognises newer cpus like Intel Xeon Scalable Skylake or Intel Xeon E5-26xx v4 Broadwell as core-avx2 targets and that disables AVX instructions. Workaround is when PHP 7.3 is selected in centmin.sh menu option 5 upgrading, switch from CentOS 7 native GCC 4.8.5 to devtoolset-7 GCC 7.3.1 which is used to already build Nginx. Will have to do the same for CentOS 6.x too when PHP 7.3 selected.
Click to expand...

core-avx2 targets disable avx instructions in GCC 4.8.5
Code (Text):
gcc -c -Q -march=core-avx2 --help=target | egrep '\-mavx |\-mavx2 '
  -mavx                                 [disabled]
  -mavx2                                [disabled]
but not with GCC 7.3.1 or 8.2.1
Code (Text):
/opt/rh/devtoolset-7/root/bin/gcc -c -Q -march=core-avx2 --help=target | egrep '\-mavx |\-mavx2 ' 
  -mavx                                 [enabled]
  -mavx2                                [enabled]

/opt/rh/devtoolset-8/root/bin/gcc -c -Q -march=core-avx2 --help=target | egrep '\-mavx |\-mavx2 '
  -mavx                                 [enabled]
  -mavx2                                [enabled]
workaround allows PHP uses higher version of GCC compiler than CentOS 7 system GCC 4.8.5 it works, but i see your PHP upgrade log GCC 4.8.5 system compiler was used.

Do you have any persistent config file /etc/centminmod/custom_config.inc settings set which may disable my workarounds I wonder ? edit: i see you have alot of custom settings in https://gist.githubusercontent.com/...3f3a80756318032846a49fa8b4f3d1b/gistfile1.txt. I'd try an empty persistent config and see how PHP 7.3.2 compiles first to rule out your persistent config settings.

One such setting is GCCINTEL_PHP='n', it defaults to GCCINTEL_PHP='y' by default in 123.09beta01 and only time it's disabled is if there is less than 2 cpu threads on the server from these lines https://github.com/centminmod/centminmod/blob/123.09beta01/inc/php_configure.inc#L726-L737

It could be the last part if you are using Intel Skylake cpu with 1 cpu core VPS then GCCINTEL_PHP='n' is set and PHP never gets to use devtoolset provided higher GCC 7.3+ compiler versions and for PHP 7.3 means avx instructions are not enabled due to using core-avx2 targets. So possible fix is to add exception to that rule for less than 2 cpu cores to exclude PHP 7.3 from GCCINTEL_PHP='n' auto setup

Another reason is if you set LOWMEM_INSTALL='y' which for low memory installs won't have enough memory on system for intel optimised PHP compilations so disables devtoolset GCC 7.3+ compilations and fallsback to system GCC 4.8.5 compiler and thus would have problems with PHP 7.3 required higher GCC versions

rdan · Feb 24, 2019

https://www.ovh.com/world/dedicated-servers/enterprise/1901sp02.xml
CPU: Intel Xeon E3-1270v6 - 4c/8t - 3.8GHz /4.2GHz
RAM: 32GB DDR4 ECC 2400 MHz

Code:

# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    2
Core(s) per socket:    4
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 158
Model name:            Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
Stepping:              9
CPU MHz:               899.902
CPU max MHz:           4200.0000
CPU min MHz:           800.0000
BogoMIPS:              7584.00
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              8192K
NUMA node0 CPU(s):     0-7
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d



# cat /proc/cpuinfo
processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 826.843
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 0
cpu cores    : 4
apicid        : 0
initial apicid    : 0
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 1
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 823.364
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 1
cpu cores    : 4
apicid        : 2
initial apicid    : 2
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 2
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 823.364
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 2
cpu cores    : 4
apicid        : 4
initial apicid    : 4
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 3
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 838.671
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 3
cpu cores    : 4
apicid        : 6
initial apicid    : 6
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 4
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 799.938
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 0
cpu cores    : 4
apicid        : 1
initial apicid    : 1
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 5
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 838.208
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 1
cpu cores    : 4
apicid        : 3
initial apicid    : 3
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 6
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 2182.495
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 2
cpu cores    : 4
apicid        : 5
initial apicid    : 5
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 7
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 799.938
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 3
cpu cores    : 4
apicid        : 7
initial apicid    : 7
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

rdan · Feb 24, 2019

eva2000 said: ↑

One such setting is GCCINTEL_PHP='n', it defaults to GCCINTEL_PHP='y' by default in 123.09beta01 and only time it's disabled is if there is less than 2 cpu threads on the server from these lines
Click to expand...

I didn't set this config.

rdan · Feb 24, 2019

This is the culprit:
DEVTOOLSETEIGHT='y'

Not compatible with new install.

eva2000 · Feb 24, 2019

Ah so Intel Kaby Lake = Xeon E3-1270v6 probably similar issue as older GCC 4.8.5 compiler really can't detect cpus beyond Intel Broadwell i.e. Xeon E5-26xx v4 or newer like GCC 7.3.1 and 8.2.1+ compilers. Though I have found another possible reason that only happens on initial Centmin Mod installs - there's a hardcoded reference to system default /usr/bin/gcc compiler which needs changing too.

rdan said: ↑

This is the culprit:
DEVTOOLSETEIGHT='y'
Click to expand...

Ah yes i deliberately disabled that in PHP compiles as it was breaking 3rd party PHP extension compilations in the past private testing. I have tested with proper DEVTOOLSETEIGHT='y' support enabled now and it works.

Updated 123.09beta01 with latest fixes for this at https://community.centminmod.com/th...r-1-cpu-thread-systems-in-123-09beta01.16679/. So try a fresh CentOS 7.6 OS and fresh Centmin Mod 123.09beta01 install with PHP 7.3 default
Code (Text):
yum -y update; curl -O https://centminmod.com/betainstaller73.sh && chmod 0700 betainstaller73.sh && bash betainstaller73.sh

eva2000 · Feb 24, 2019

rdan said: ↑

https://www.ovh.com/world/dedicated-servers/enterprise/1901sp02.xml
CPU: Intel Xeon E3-1270v6 - 4c/8t - 3.8GHz /4.2GHz
RAM: 32GB DDR4 ECC 2400 MHz

Code:

# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    2
Core(s) per socket:    4
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 158
Model name:            Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
Stepping:              9
CPU MHz:               899.902
CPU max MHz:           4200.0000
CPU min MHz:           800.0000
BogoMIPS:              7584.00
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              8192K
NUMA node0 CPU(s):     0-7
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d



# cat /proc/cpuinfo
processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 826.843
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 0
cpu cores    : 4
apicid        : 0
initial apicid    : 0
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 1
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 823.364
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 1
cpu cores    : 4
apicid        : 2
initial apicid    : 2
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 2
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 823.364
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 2
cpu cores    : 4
apicid        : 4
initial apicid    : 4
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 3
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 838.671
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 3
cpu cores    : 4
apicid        : 6
initial apicid    : 6
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 4
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 799.938
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 0
cpu cores    : 4
apicid        : 1
initial apicid    : 1
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 5
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 838.208
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 1
cpu cores    : 4
apicid        : 3
initial apicid    : 3
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 6
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 2182.495
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 2
cpu cores    : 4
apicid        : 5
initial apicid    : 5
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

processor    : 7
vendor_id    : GenuineIntel
cpu family    : 6
model        : 158
model name    : Intel(R) Xeon(R) CPU E3-1270 v6 @ 3.80GHz
stepping    : 9
microcode    : 0x8e
cpu MHz        : 799.938
cache size    : 8192 KB
physical id    : 0
siblings    : 8
core id        : 3
cpu cores    : 4
apicid        : 7
initial apicid    : 7
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp flush_l1d
bogomips    : 7584.00
clflush size    : 64
cache_alignment    : 64
address sizes    : 39 bits physical, 48 bits virtual
power management:

Click to expand...

also what's output for these 3 commands - curious to see what GCC 4.8.5, GCC 7.3.1 and GCC 8.2.1 detect for Intel Xeon E3-1270v6 Kaby Lake's march

Code (Text):

gcc -c -Q -march=native --help=target
/opt/rh/devtoolset-7/root/bin/gcc -c -Q -march=native --help=target
/opt/rh/devtoolset-8/root/bin/gcc -c -Q -march=native --help=target

rdan · Feb 24, 2019

Code:

# gcc -c -Q -march=native --help=target
The following options are target specific:
  -m128bit-long-double                [disabled]
  -m32                                [disabled]
  -m3dnow                             [disabled]
  -m3dnowa                            [disabled]
  -m64                                [enabled]
  -m80387                             [enabled]
  -m8bit-idiv                         [disabled]
  -m96bit-long-double                 [enabled]
  -mabi=                              sysv
  -mabm                               [enabled]
  -maccumulate-outgoing-args          [disabled]
  -maddress-mode=                     short
  -madx                               [enabled]
  -maes                               [enabled]
  -malign-double                      [disabled]
  -malign-functions=                  0
  -malign-jumps=                      0
  -malign-loops=                      0
  -malign-stringops                   [enabled]
  -mandroid                           [disabled]
  -march=                             core-avx2
  -masm=                              att
  -mavx                               [enabled]
  -mavx2                              [enabled]
  -mavx256-split-unaligned-load     [disabled]
  -mavx256-split-unaligned-store     [disabled]
  -mbionic                            [disabled]
  -mbmi                               [enabled]
  -mbmi2                              [enabled]
  -mbranch-cost=                      0
  -mcld                               [disabled]
  -mcmodel=                           32
  -mcpu=                             
  -mcrc32                             [disabled]
  -mcx16                              [enabled]
  -mdispatch-scheduler                [disabled]
  -mf16c                              [enabled]
  -mfancy-math-387                    [enabled]
  -mfentry                            [enabled]
  -mfma                               [enabled]
  -mfma4                              [disabled]
  -mforce-drap                        [disabled]
  -mfp-ret-in-387                     [enabled]
  -mfpmath=                           387
  -mfsgsbase                          [enabled]
  -mfunction-return=                  keep
  -mfused-madd                       
  -mfxsr                              [enabled]
  -mglibc                             [enabled]
  -mhard-float                        [enabled]
  -mhle                               [enabled]
  -mieee-fp                           [enabled]
  -mincoming-stack-boundary=          0
  -mindirect-branch-register          [disabled]
  -mindirect-branch=                  keep
  -minline-all-stringops              [disabled]
  -minline-stringops-dynamically     [disabled]
  -mintel-syntax                     
  -mlarge-data-threshold=             0x10000
  -mlong-double-64                    [disabled]
  -mlong-double-80                    [enabled]
  -mlwp                               [disabled]
  -mlzcnt                             [enabled]
  -mmmx                               [disabled]
  -mmovbe                             [enabled]
  -mms-bitfields                      [disabled]
  -mno-align-stringops                [disabled]
  -mno-fancy-math-387                 [disabled]
  -mno-push-args                      [disabled]
  -mno-red-zone                       [disabled]
  -mno-sse4                           [disabled]
  -momit-leaf-frame-pointer           [disabled]
  -mpc32                              [disabled]
  -mpc64                              [disabled]
  -mpc80                              [disabled]
  -mpclmul                            [enabled]
  -mpku                               [disabled]
  -mpopcnt                            [enabled]
  -mprefer-avx128                     [disabled]
  -mpreferred-stack-boundary=         0
  -mprfchw                            [enabled]
  -mpush-args                         [enabled]
  -mrdrnd                             [enabled]
  -mrdseed                            [enabled]
  -mrecip                             [disabled]
  -mrecip=                           
  -mred-zone                          [enabled]
  -mregparm=                          0
  -mrtd                               [disabled]
  -mrtm                               [enabled]
  -msahf                              [enabled]
  -msoft-float                        [disabled]
  -msse                               [enabled]
  -msse2                              [enabled]
  -msse2avx                           [disabled]
  -msse3                              [enabled]
  -msse4                              [enabled]
  -msse4.1                            [enabled]
  -msse4.2                            [enabled]
  -msse4a                             [disabled]
  -msse5                             
  -msseregparm                        [disabled]
  -mssse3                             [enabled]
  -mstack-arg-probe                   [disabled]
  -mstackrealign                      [enabled]
  -mstringop-strategy=                [default]
  -mtbm                               [disabled]
  -mtls-dialect=                      gnu
  -mtls-direct-seg-refs               [enabled]
  -mtune=                             generic
  -muclibc                            [disabled]
  -mveclibabi=                        [default]
  -mvect8-ret-in-mem                  [disabled]
  -mvzeroupper                        [disabled]
  -mx32                               [disabled]
  -mxop                               [disabled]
  -mxsave                             [enabled]
  -mxsaveopt                          [enabled]

  Known assembler dialects (for use with the -masm-dialect= option):
    att intel

  Known ABIs (for use with the -mabi= option):
    ms sysv

  Known code models (for use with the -mcmodel= option):
    32 kernel large medium small

  Valid arguments to -mfpmath=:
    387 387+sse 387,sse both sse sse+387 sse,387

  Known indirect branch choices (for use with the -mindirect-branch=/-mfunction-return= options):
    keep thunk thunk-extern thunk-inline

  Known vectorization library ABIs (for use with the -mveclibabi= option):
    acml svml

  Known address mode (for use with the -maddress-mode= option):
    long short

  Valid arguments to -mstringop-strategy=:
    byte_loop libcall loop rep_4byte rep_8byte rep_byte unrolled_loop

  Known TLS dialects (for use with the -mtls-dialect= option):
    gnu gnu2

# /opt/rh/devtoolset-7/root/bin/gcc -c -Q -march=native --help=target
The following options are target specific:
  -m128bit-long-double                [enabled]
  -m16                                [disabled]
  -m32                                [disabled]
  -m3dnow                             [disabled]
  -m3dnowa                            [disabled]
  -m64                                [enabled]
  -m80387                             [enabled]
  -m8bit-idiv                         [disabled]
  -m96bit-long-double                 [disabled]
  -mabi=                              sysv
  -mabm                               [enabled]
  -maccumulate-outgoing-args          [disabled]
  -maddress-mode=                     long
  -madx                               [enabled]
  -maes                               [enabled]
  -malign-data=                       compat
  -malign-double                      [disabled]
  -malign-functions=                  0
  -malign-jumps=                      0
  -malign-loops=                      0
  -malign-stringops                   [enabled]
  -mandroid                           [disabled]
  -march=                             broadwell
  -masm=                              att
  -mavx                               [enabled]
  -mavx2                              [enabled]
  -mavx256-split-unaligned-load     [enabled]
  -mavx256-split-unaligned-store     [enabled]
  -mavx5124fmaps                      [disabled]
  -mavx5124vnniw                      [disabled]
  -mavx512bw                          [disabled]
  -mavx512cd                          [disabled]
  -mavx512dq                          [disabled]
  -mavx512er                          [disabled]
  -mavx512f                           [disabled]
  -mavx512ifma                        [disabled]
  -mavx512pf                          [disabled]
  -mavx512vbmi                        [disabled]
  -mavx512vl                          [disabled]
  -mavx512vpopcntdq                   [disabled]
  -mbionic                            [disabled]
  -mbmi                               [enabled]
  -mbmi2                              [enabled]
  -mbranch-cost=                      3
  -mcld                               [disabled]
  -mclflushopt                        [enabled]
  -mclwb                              [disabled]
  -mclzero                            [disabled]
  -mcmodel=                           [default]
  -mcpu=                             
  -mcrc32                             [disabled]
  -mcx16                              [enabled]
  -mdispatch-scheduler                [disabled]
  -mdump-tune-features                [disabled]
  -mf16c                              [enabled]
  -mfancy-math-387                    [enabled]
  -mfentry                            [disabled]
  -mfma                               [enabled]
  -mfma4                              [disabled]
  -mforce-drap                        [disabled]
  -mfp-ret-in-387                     [enabled]
  -mfpmath=                           sse
  -mfsgsbase                          [enabled]
  -mfunction-return=                  keep
  -mfused-madd                       
  -mfxsr                              [enabled]
  -mgeneral-regs-only                 [disabled]
  -mglibc                             [enabled]
  -mhard-float                        [enabled]
  -mhle                               [enabled]
  -miamcu                             [disabled]
  -mieee-fp                           [enabled]
  -mincoming-stack-boundary=          0
  -mindirect-branch-register          [disabled]
  -mindirect-branch=                  keep
  -minline-all-stringops              [disabled]
  -minline-stringops-dynamically     [disabled]
  -mintel-syntax                     
  -mlarge-data-threshold=<number>     65536
  -mlong-double-128                   [disabled]
  -mlong-double-64                    [disabled]
  -mlong-double-80                    [enabled]
  -mlwp                               [disabled]
  -mlzcnt                             [enabled]
  -mmemcpy-strategy=                 
  -mmemset-strategy=                 
  -mmitigate-rop                      [disabled]
  -mmmx                               [enabled]
  -mmovbe                             [enabled]
  -mmpx                               [disabled]
  -mms-bitfields                      [disabled]
  -mmusl                              [disabled]
  -mmwaitx                            [disabled]
  -mno-align-stringops                [disabled]
  -mno-default                        [disabled]
  -mno-fancy-math-387                 [disabled]
  -mno-push-args                      [disabled]
  -mno-red-zone                       [disabled]
  -mno-sse4                           [disabled]
  -mnop-mcount                        [disabled]
  -momit-leaf-frame-pointer           [disabled]
  -mpc32                              [disabled]
  -mpc64                              [disabled]
  -mpc80                              [disabled]
  -mpclmul                            [enabled]
  -mpcommit                           [disabled]
  -mpku                               [disabled]
  -mpopcnt                            [enabled]
  -mprefer-avx128                     [disabled]
  -mpreferred-stack-boundary=         0
  -mprefetchwt1                       [disabled]
  -mprfchw                            [enabled]
  -mpush-args                         [enabled]
  -mrdpid                             [disabled]
  -mrdrnd                             [enabled]
  -mrdseed                            [enabled]
  -mrecip                             [disabled]
  -mrecip=                           
  -mrecord-mcount                     [disabled]
  -mred-zone                          [enabled]
  -mregparm=                          6
  -mrtd                               [disabled]
  -mrtm                               [enabled]
  -msahf                              [enabled]
  -msgx                               [enabled]
  -msha                               [disabled]
  -mskip-rax-setup                    [disabled]
  -msoft-float                        [disabled]
  -msse                               [enabled]
  -msse2                              [enabled]
  -msse2avx                           [disabled]
  -msse3                              [enabled]
  -msse4                              [enabled]
  -msse4.1                            [enabled]
  -msse4.2                            [enabled]
  -msse4a                             [disabled]
  -msse5                             
  -msseregparm                        [disabled]
  -mssse3                             [enabled]
  -mstack-arg-probe                   [disabled]
  -mstack-protector-guard=            tls
  -mstackrealign                      [disabled]
  -mstringop-strategy=                [default]
  -mstv                               [enabled]
  -mtbm                               [disabled]
  -mtls-dialect=                      gnu
  -mtls-direct-seg-refs               [enabled]
  -mtune-ctrl=                       
  -mtune=                             generic
  -muclibc                            [disabled]
  -mveclibabi=                        [default]
  -mvect8-ret-in-mem                  [disabled]
  -mvzeroupper                        [enabled]
  -mx32                               [disabled]
  -mxop                               [disabled]
  -mxsave                             [enabled]
  -mxsavec                            [enabled]
  -mxsaveopt                          [enabled]
  -mxsaves                            [enabled]

  Known assembler dialects (for use with the -masm= option):
    att intel

  Known ABIs (for use with the -mabi= option):
    ms sysv

  Known code models (for use with the -mcmodel= option):
    32 kernel large medium small

  Valid arguments to -mfpmath=:
    387 387+sse 387,sse both sse sse+387 sse,387

  Known indirect branch choices (for use with the -mindirect-branch=/-mfunction-return= options):
    keep thunk thunk-extern thunk-inline

  Known data alignment choices (for use with the -malign-data= option):
    abi cacheline compat

  Known vectorization library ABIs (for use with the -mveclibabi= option):
    acml svml

  Known address mode (for use with the -maddress-mode= option):
    long short

  Known stack protector guard (for use with the -mstack-protector-guard= option):
    global tls

  Valid arguments to -mstringop-strategy=:
    byte_loop libcall loop rep_4byte rep_8byte rep_byte unrolled_loop vector_loop

  Known TLS dialects (for use with the -mtls-dialect= option):
    gnu gnu2

# /opt/rh/devtoolset-8/root/bin/gcc -c -Q -march=native --help=target
The following options are target specific:
  -m128bit-long-double                [enabled]
  -m16                                [disabled]
  -m32                                [disabled]
  -m3dnow                             [disabled]
  -m3dnowa                            [disabled]
  -m64                                [enabled]
  -m80387                             [enabled]
  -m8bit-idiv                         [disabled]
  -m96bit-long-double                 [disabled]
  -mabi=                              sysv
  -mabm                               [enabled]
  -maccumulate-outgoing-args          [disabled]
  -maddress-mode=                     long
  -madx                               [enabled]
  -maes                               [enabled]
  -malign-data=                       compat
  -malign-double                      [disabled]
  -malign-functions=                  0
  -malign-jumps=                      0
  -malign-loops=                      0
  -malign-stringops                   [enabled]
  -mandroid                           [disabled]
  -march=                             skylake
  -masm=                              att
  -mavx                               [enabled]
  -mavx2                              [enabled]
  -mavx256-split-unaligned-load     [disabled]
  -mavx256-split-unaligned-store     [disabled]
  -mavx5124fmaps                      [disabled]
  -mavx5124vnniw                      [disabled]
  -mavx512bitalg                      [disabled]
  -mavx512bw                          [disabled]
  -mavx512cd                          [disabled]
  -mavx512dq                          [disabled]
  -mavx512er                          [disabled]
  -mavx512f                           [disabled]
  -mavx512ifma                        [disabled]
  -mavx512pf                          [disabled]
  -mavx512vbmi                        [disabled]
  -mavx512vbmi2                       [disabled]
  -mavx512vl                          [disabled]
  -mavx512vnni                        [disabled]
  -mavx512vpopcntdq                   [disabled]
  -mbionic                            [disabled]
  -mbmi                               [enabled]
  -mbmi2                              [enabled]
  -mbranch-cost=<0,5>                 3
  -mcall-ms2sysv-xlogues              [disabled]
  -mcet                               
  -mcet-switch                        [disabled]
  -mcld                               [disabled]
  -mclflushopt                        [enabled]
  -mclwb                              [disabled]
  -mclzero                            [disabled]
  -mcmodel=                           [default]
  -mcpu=                             
  -mcrc32                             [disabled]
  -mcx16                              [enabled]
  -mdispatch-scheduler                [disabled]
  -mdump-tune-features                [disabled]
  -mf16c                              [enabled]
  -mfancy-math-387                    [enabled]
  -mfentry                            [disabled]
  -mfma                               [enabled]
  -mfma4                              [disabled]
  -mforce-drap                        [disabled]
  -mforce-indirect-call               [disabled]
  -mfp-ret-in-387                     [enabled]
  -mfpmath=                           sse
  -mfsgsbase                          [enabled]
  -mfunction-return=                  keep
  -mfused-madd                       
  -mfxsr                              [enabled]
  -mgeneral-regs-only                 [disabled]
  -mgfni                              [disabled]
  -mglibc                             [enabled]
  -mhard-float                        [enabled]
  -mhle                               [enabled]
  -miamcu                             [disabled]
  -mieee-fp                           [enabled]
  -mincoming-stack-boundary=          0
  -mindirect-branch-register          [disabled]
  -mindirect-branch=                  keep
  -minline-all-stringops              [disabled]
  -minline-stringops-dynamically     [disabled]
  -mintel-syntax                     
  -mlarge-data-threshold=<number>     65536
  -mlong-double-128                   [disabled]
  -mlong-double-64                    [disabled]
  -mlong-double-80                    [enabled]
  -mlwp                               [disabled]
  -mlzcnt                             [enabled]
  -mmemcpy-strategy=                 
  -mmemset-strategy=                 
  -mmitigate-rop                      [disabled]
  -mmmx                               [enabled]
  -mmovbe                             [enabled]
  -mmovdir64b                         [disabled]
  -mmovdiri                           [disabled]
  -mmpx                               [disabled]
  -mms-bitfields                      [disabled]
  -mmusl                              [disabled]
  -mmwaitx                            [disabled]
  -mno-align-stringops                [disabled]
  -mno-default                        [disabled]
  -mno-fancy-math-387                 [disabled]
  -mno-push-args                      [disabled]
  -mno-red-zone                       [disabled]
  -mno-sse4                           [disabled]
  -mnop-mcount                        [disabled]
  -momit-leaf-frame-pointer           [disabled]
  -mpc32                              [disabled]
  -mpc64                              [disabled]
  -mpc80                              [disabled]
  -mpclmul                            [enabled]
  -mpcommit                           [disabled]
  -mpconfig                           [disabled]
  -mpku                               [disabled]
  -mpopcnt                            [enabled]
  -mprefer-avx128                     
  -mprefer-vector-width=              none
  -mpreferred-stack-boundary=         0
  -mprefetchwt1                       [disabled]
  -mprfchw                            [enabled]
  -mpush-args                         [enabled]
  -mrdpid                             [disabled]
  -mrdrnd                             [enabled]
  -mrdseed                            [enabled]
  -mrecip                             [disabled]
  -mrecip=                           
  -mrecord-mcount                     [disabled]
  -mred-zone                          [enabled]
  -mregparm=                          6
  -mrtd                               [disabled]
  -mrtm                               [enabled]
  -msahf                              [enabled]
  -msgx                               [enabled]
  -msha                               [disabled]
  -mshstk                             [disabled]
  -mskip-rax-setup                    [disabled]
  -msoft-float                        [disabled]
  -msse                               [enabled]
  -msse2                              [enabled]
  -msse2avx                           [disabled]
  -msse3                              [enabled]
  -msse4                              [enabled]
  -msse4.1                            [enabled]
  -msse4.2                            [enabled]
  -msse4a                             [disabled]
  -msse5                             
  -msseregparm                        [disabled]
  -mssse3                             [enabled]
  -mstack-arg-probe                   [disabled]
  -mstack-protector-guard-offset=     
  -mstack-protector-guard-reg=         
  -mstack-protector-guard-symbol=     
  -mstack-protector-guard=            tls
  -mstackrealign                      [disabled]
  -mstringop-strategy=                [default]
  -mstv                               [enabled]
  -mtbm                               [disabled]
  -mtls-dialect=                      gnu
  -mtls-direct-seg-refs               [enabled]
  -mtune-ctrl=                       
  -mtune=                             skylake
  -muclibc                            [disabled]
  -mvaes                              [disabled]
  -mveclibabi=                        [default]
  -mvect8-ret-in-mem                  [disabled]
  -mvpclmulqdq                        [disabled]
  -mvzeroupper                        [enabled]
  -mwbnoinvd                          [disabled]
  -mx32                               [disabled]
  -mxop                               [disabled]
  -mxsave                             [enabled]
  -mxsavec                            [enabled]
  -mxsaveopt                          [enabled]
  -mxsaves                            [enabled]

  Known assembler dialects (for use with the -masm= option):
    att intel

  Known ABIs (for use with the -mabi= option):
    ms sysv

  Known code models (for use with the -mcmodel= option):
    32 kernel large medium small

  Valid arguments to -mfpmath=:
    387 387+sse 387,sse both sse sse+387 sse,387

  Known indirect branch choices (for use with the -mindirect-branch=/-mfunction-return= options):
    keep thunk thunk-extern thunk-inline

  Known data alignment choices (for use with the -malign-data= option):
    abi cacheline compat

  Known vectorization library ABIs (for use with the -mveclibabi= option):
    acml svml

  Known address mode (for use with the -maddress-mode= option):
    long short

  Known preferred register vector length (to use with the -mprefer-vector-width= option)
    128 256 512 none

  Known stack protector guard (for use with the -mstack-protector-guard= option):
    global tls

  Valid arguments to -mstringop-strategy=:
    byte_loop libcall loop rep_4byte rep_8byte rep_byte unrolled_loop vector_loop

  Known TLS dialects (for use with the -mtls-dialect= option):
    gnu gnu2

eva2000 · Feb 24, 2019

Thanks so Intel Xeon E3-1270v6 is detected as

core-avx2 march with GCC 4.8.5

broadwell march with GCC 7.3.1

skylake march with GCC 8.2.1

Thinking we should move to DEVTOOLSETEIGHT='y' default instead of DEVTOOLSETSEVEN='y' default in 123.09beta01 especially with newer than Intel Broadwell architecture based processors like Intel Kaby Lake and Intel Skylake.

eva2000 · Feb 24, 2019

Centmin Mod 123.09beta01 updated to switch from DEVTOOLSETSEVEN='y' default GCC 7.3.1 compilations for Nginx to DEVTOOLSETEIGHT='y' default GCC 8.2.1 compilations for Nginx and optionally for PHP-FPM if using PHP_PGO='y' or if PHP 7.3 is detected https://community.centminmod.com/threads/switch-to-devtoolseteight-y-default-in-123-09beta01.16680/

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