Am Mon, 03 Sep 2018 06:35:42 -0600 schrieb "Jan Beulich" : > what is the actual problem? The mere > listing of compiler flags passed does not make clear to me where the clash > is, or how it would surface. As I noticed just now, it fails to build only in Tumbleweed. So in this specific case osstest would have caught it only in a few years from now. [ 38s] make -C x86_instruction_emulator install [ 38s] make[6]: Entering directory '/home/abuild/rpmbuild/BUILD/xen-4.12.20180831T120653.6164970942/non-dbg/tools/fuzz/x86_instruction_emulator' [ 38s] [ -L x86-emulate.h ] || ln -sf /home/abuild/rpmbuild/BUILD/xen-4.12.20180831T120653.6164970942/non-dbg/tools/fuzz/x86_instruction_emulator/../../../tools/tests/x86_emulator/x86-emulate.h [ 38s] [ -L x86_emulate ] || ln -sf /home/abuild/rpmbuild/BUILD/xen-4.12.20180831T120653.6164970942/non-dbg/tools/fuzz/x86_instruction_emulator/../../../xen/arch/x86/x86_emulate [ 38s] /usr/bin/gcc -m64 -DBUILD_ID -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes -Wdeclaration-after-statement -Wno-unused-but-set-variable -Wno-unused-local-typedefs -O0 -fno-omit-frame-pointer -D__XEN_INTERFACE_VERSION__=__XEN_LATEST_INTERFACE_VERSION__ -MMD -MF .fuzz-emul.o.d -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -I/home/abuild/rpmbuild/BUILD/xen-4.12.20180831T120653.6164970942/non-dbg/tools/fuzz/x86_instruction_emulator/../../../tools/include -D__XEN_TOOLS__ -I. -c -o fuzz-emul.o fuzz-emul.c [ 38s] In file included from /usr/include/features.h:428, [ 38s] from /usr/include/assert.h:35, [ 38s] from fuzz-emul.c:1: [ 38s] fuzz-emul.c: In function 'input_read': [ 38s] /usr/include/bits/string_fortified.h:31:1: error: inlining failed in call to always_inline 'memcpy': target specific option mismatch [ 38s] __NTH (memcpy (void *__restrict __dest, const void *__restrict __src, [ 38s] ^~~~~ [ 38s] fuzz-emul.c:67:5: note: called from here [ 38s] memcpy(dst, &s->corpus->data[s->data_index], size); [ 38s] ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [ 38s] In file included from /usr/include/features.h:428, [ 38s] from /usr/include/assert.h:35, [ 38s] from fuzz-emul.c:1: [ 38s] /usr/include/bits/string_fortified.h:31:1: error: inlining failed in call to always_inline 'memcpy': target specific option mismatch [ 38s] __NTH (memcpy (void *__restrict __dest, const void *__restrict __src, [ 38s] ^~~~~ [ 38s] fuzz-emul.c:67:5: note: called from here [ 38s] memcpy(dst, &s->corpus->data[s->data_index], size); [ 38s] ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [ 38s] make[6]: *** [/home/abuild/rpmbuild/BUILD/xen-4.12.20180831T120653.6164970942/non-dbg/tools/fuzz/x86_instruction_emulator/../../../tools/Rules.mk:225: fuzz-emul.o] Error 1 Appending -U_FORTIFY_SOURCE in tools/fuzz fixes it. Not sure why fuzz is different from the rest of tools. Olaf