http://bugzilla.suse.com/show_bug.cgi?id=1092456
http://bugzilla.suse.com/show_bug.cgi?id=1092456#c8
--- Comment #8 from Michal Kubeček ---
HAVE_JUMP_LABEL is defined in this way:
#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
# define HAVE_JUMP_LABEL
#endif
where CONFIG_JUMP_LABEL is enabled. CC_HAVE_ASM_GOTO is detected on build
time by trying to compile this (see scripts/gcc-goto.sh):
-----------------------------------------------------------------------------
int main(void)
{
#if defined(__arm__) || defined(__aarch64__)
/*
* Not related to asm goto, but used by jump label
* and broken on some ARM GCC versions (see GCC Bug 48637).
*/
static struct { int dummy; int state; } tp;
asm (".long %c0" :: "i" (&tp.state));
#endif
entry:
asm goto ("" :::: entry);
return 0;
}
-----------------------------------------------------------------------------
For some reason this succeeds when building the module but fails when building
the kernel packages in IBS. There is one related commit between 4.16 and
4.17-rc1: e501ce957a78 ("x86: Force asm-goto") but I don't see how it could
break the detection in IBS.
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