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 _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx