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* [glibc] powerpc: Fix powerpc64 strchrnul build with old gcc
@ 2023-07-26 14:22 Adhemerval Zanella
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From: Adhemerval Zanella @ 2023-07-26 14:22 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=648c3b574d4465042116db6016c13bf6cc53db54
commit 648c3b574d4465042116db6016c13bf6cc53db54
Author: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
Date: Mon Jul 24 14:15:24 2023 -0300
powerpc: Fix powerpc64 strchrnul build with old gcc
The compiler might not see that internal definition is an alias
due the libc_ifunc macro, which redefines __strchrnul. With
gcc 6 it fails with:
In file included from <command-line>:0:0:
./../include/libc-symbols.h:472:33: error: ‘__EI___strchrnul’ aliased to
undefined symbol ‘__GI___strchrnul’
extern thread __typeof (name) __EI_##name \
^
./../include/libc-symbols.h:468:3: note: in expansion of macro
‘__hidden_ver2’
__hidden_ver2 (, local, internal, name)
^~~~~~~~~~~~~
./../include/libc-symbols.h:476:29: note: in expansion of macro
‘__hidden_ver1’
# define hidden_def(name) __hidden_ver1(__GI_##name, name, name);
^~~~~~~~~~~~~
./../include/libc-symbols.h:557:32: note: in expansion of macro
‘hidden_def’
# define libc_hidden_def(name) hidden_def (name)
^~~~~~~~~~
../sysdeps/powerpc/powerpc64/multiarch/strchrnul.c:38:1: note: in
expansion of macro ‘libc_hidden_def’
libc_hidden_def (__strchrnul)
^~~~~~~~~~~~~~~
Use libc_ifunc_hidden as stpcpy. Checked on powerpc64 with
gcc 6 and gcc 13.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diff:
---
sysdeps/powerpc/powerpc64/multiarch/strchrnul.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strchrnul.c b/sysdeps/powerpc/powerpc64/multiarch/strchrnul.c
index 94873507a6..87dd41f72d 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strchrnul.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strchrnul.c
@@ -27,13 +27,13 @@ extern __typeof (__strchrnul) __strchrnul_power8 attribute_hidden;
/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
ifunc symbol properly. */
-libc_ifunc (__strchrnul,
- (hwcap2 & PPC_FEATURE2_ARCH_2_07
- && hwcap & PPC_FEATURE_HAS_ALTIVEC)
- ? __strchrnul_power8 :
- (hwcap & PPC_FEATURE_ARCH_2_06)
- ? __strchrnul_power7
- : __strchrnul_ppc);
+libc_ifunc_hidden (__strchrnul, __strchrnul,
+ (hwcap2 & PPC_FEATURE2_ARCH_2_07
+ && hwcap & PPC_FEATURE_HAS_ALTIVEC)
+ ? __strchrnul_power8 :
+ (hwcap & PPC_FEATURE_ARCH_2_06)
+ ? __strchrnul_power7
+ : __strchrnul_ppc);
libc_hidden_def (__strchrnul)
weak_alias (__strchrnul, strchrnul)
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2023-07-26 14:22 [glibc] powerpc: Fix powerpc64 strchrnul build with old gcc Adhemerval Zanella
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