Hello,
I found a bug in configure.in around line 2640:
ac_cv_have_visibility_builtin_bug=no
if ! ${CC-cc} ${CFLAGS} ${DSO_PIC_CFLAGS}
${DSO_LDOPTS} -O2 -S -o conftest.S conftest.c > /dev/null 2>&1 ; then
ac_cv_have_visibility_builtin_bug=yes
else
if test `grep -c "@PLT" conftest.S` = 0; then
ac_cv_visibility_builtin_bug=yes
fi
fi
The second 'if' uses a wrong variable name, so the result of 'grep' is
effectively ignored. The problem is that if I fix this bug, clang
(3.4.1) fails this test (it optimizes all code out with -O2), the
configuration variables (related to -fvisibility) are changed
accordingly, and then a simple firefox build fails. The same bug is also
in js/src/configure.in.
Is this configure check really relevant now? The fact that it is always
successfully passed by any compiler that can somehow compile the
conftest.c and that it has not been fixed since its introduction in 2006
probably shows that no. Does anybody have ideas about what should be
done with it, if any?
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