Am 23.05.2017 um 07:00 schrieb Pete Zaitcev:
Hi, All:
I'm going to re-state the problem in short, but in case, URL
https://bugzilla.redhat.com/show_bug.cgi?id=1454543
- I maintain a library (liberasurecode)
- It contains a call to ceill() from -lm
- When Koji builds the code, something makes gcc to inline AVX
- The result blows up:
Program received signal SIGILL, Illegal instruction.
0x00007fafaf9e04bd in liberasurecode_get_aligned_data_size (
=> 0x00007ffff78c44bd <+61>: vxorpd %xmm0,%xmm0,%xmm0
As much as I can tell, there's nothing custom in CFLAGS in Makefile.am,
everything is inherited from RPM somehow. Here's how the actual line
looks like in Koji logs:
libtool: compile: gcc -DHAVE_CONFIG_H -I. -I../include
-I../include/erasurecode -I../include/xor_codes -I../include/rs_vand
-I../include/isa_l -I../include/shss -Werror -O2 -g -Werror -D_GNU_SOURCE=1
-Wall -pedantic -std=c99 -O2 -g -pipe -Wall -Werror=format-security
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong
--param=ssp-buffer-size=4 -grecord-gcc-switches
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -mmmx
-DINTEL_MMX -msse -DINTEL_SSE -msse2 -DINTEL_SSE2 -msse3 -DINTEL_SSE3 -mssse3
-DINTEL_SSSE3 -msse4.1 -DINTEL_SSE41 -msse4.2 -DINTEL_SSE42 -mavx -DINTEL_AVX
-DARCH_64 -c erasurecode.c -fPIC -DPIC -o .libs/liberasurecode_la-erasurecode.o
So, what now? I have no clue where to start fixing this.
Thanks in advance for any suggestions,
-- Pete
Hi Pete,
for some reason upstream appends `-mmmx -DINTEL_MMX -msse -DINTEL_SSE
-msse2 -DINTEL_SSE2 -msse3 -DINTEL_SSE3 -mssse3 -DINTEL_SSSE3 -msse4.1
-DINTEL_SSE41 -msse4.2 -DINTEL_SSE42 -mavx -DINTEL_AVX` to CFLAGS,
activating avx and several different sse versions…
You must remove remove those (except for sse <= 2 on x86_64), to make
the compiled binaries portable between different (older) CPUs; those
might be set in configure.ac [1] as well…
Cheers,
Björn
[1]
https://github.com/openstack/liberasurecode/blob/master/configure.ac#L155
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