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um: fix gcov build breakage

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a) exports in gmon_syms.c duplicate kernel/gcov/* ones
b) excluding -pg in vdso compile is not enough - -fprofile-arcs
and -ftest-coverage also needs to be excluded

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Al Viro 2011-08-18 20:11:49 +01:00 committed by Richard Weinberger
parent c32324e312
commit 4d211093e8
2 changed files with 2 additions and 17 deletions
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15
arch/um/kernel/gmon_syms.c
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@ -7,18 +7,3 @@
extern void __bb_init_func(void *) __attribute__((weak));
EXPORT_SYMBOL(__bb_init_func);
/*
* This is defined (and referred to in profiling stub code) only by some GCC
* versions in libgcov.
*
* Since SuSE backported the fix, we cannot handle it depending on GCC version.
* So, unconditionally export it. But also give it a weak declaration, which
* will be overridden by any other one.
*/
extern void __gcov_init(void *) __attribute__((weak));
EXPORT_SYMBOL(__gcov_init);
extern void __gcov_merge_add(void *) __attribute__((weak));
EXPORT_SYMBOL(__gcov_merge_add);

4
arch/x86/um/vdso/Makefile
View File

@ -46,8 +46,8 @@ $(vobjs): KBUILD_CFLAGS += $(CFL)
#
# vDSO code runs in userspace and -pg doesn't help with profiling anyway.
#
CFLAGS_REMOVE_vdso-note.o = -pg
CFLAGS_REMOVE_um_vdso.o = -pg
CFLAGS_REMOVE_vdso-note.o = -pg -fprofile-arcs -ftest-coverage
CFLAGS_REMOVE_um_vdso.o = -pg -fprofile-arcs -ftest-coverage
targets += vdso-syms.lds
obj-$(VDSO64-y) += vdso-syms.lds