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| author | Joseph Myers <joseph@codesourcery.com> | 2014-12-10 16:59:02 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2014-12-10 16:59:02 +0000 |
| commit | 2cfbdb9a27a8fb08e0249d790a7e6d6053adda59 (patch) | |
| tree | e92ccf8824e22d57a060529ce9a884b2374f342f /wcsmbs/wcschr.c | |
| parent | 1b8bf3518186cdc4f22037e5f226c34ffa143b89 (diff) | |
| download | glibc-2cfbdb9a27a8fb08e0249d790a7e6d6053adda59.tar.gz glibc-2cfbdb9a27a8fb08e0249d790a7e6d6053adda59.tar.xz glibc-2cfbdb9a27a8fb08e0249d790a7e6d6053adda59.zip | |
Fix strftime wcschr namespace (bug 17634).
Use of strftime, a C90 function, ends up bringing in wcschr, which is not a C90 function. Although not a conformance bug (C90 reserves wcs*), this is still contrary to glibc practice of avoiding relying on those reservations; this patch arranges for the internal uses to use __wcschr instead, with wcschr being a weak alias. This is more complicated than some such patches because of the various IFUNC definitions of wcschr (which include code redefining libc_hidden_def in a way that involves creating __GI_wcschr manually and so also needs to create __GI___wcschr after the change of internal uses to use __wcschr). Tested for x86_64 and 32-bit x86 (testsuite, and that disassembly of installed shared libraries is unchanged by the patch). 2014-12-10 Joseph Myers <joseph@codesourcery.com> Adhemerval Zanella <azanella@linux.vnet.ibm.com> [BZ #17634] * wcsmbs/wcschr.c [!WCSCHR] (wcschr): Define as __wcschr. Undefine after defining function. Define as weak alias of __wcschr. Use libc_hidden_weak. * include/wchar.h (__wcschr): Declare. Use libc_hidden_proto. * sysdeps/i386/i686/multiarch/wcschr-c.c [IS_IN (libc) && SHARED] (libc_hidden_def): Also define __GI___wcschr alias. * sysdeps/i386/i686/multiarch/wcschr.S (wcschr): Rename to __wcschr and define as weak alias of __wcschr. * sysdeps/powerpc/power6/wcschr.c [!WCSCHR] (WCSCHR): Define as __wcschr. [!WCSCHR] (DEFAULT_WCSCHR): Define. [DEFAULT_WCSCHR] (__wcschr): Use libc_hidden_def. [DEFAULT_WCSCHR] (wcschr): Define as weak alias of __wcschr. Use libc_hidden_weak. Do not use libc_hidden_def. * sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c [IS_IN (libc) && SHARED] (libc_hidden_def): Also define __GI___wcschr alias. * sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c [IS_IN (libc)] (wcschr): Define as macro expanding to __redirect_wcschr. [IS_IN (libc)] (__wcschr_ppc): Use __redirect_wcschr in typeof. [IS_IN (libc)] (__wcschr_power6): Likewise. [IS_IN (libc)] (__wcschr_power7): Likewise. [IS_IN (libc)] (__libc_wcschr): New. Define with libc_ifunc instead of wcschr. [IS_IN (libc)] (wcschr): Undefine and define as weak alias of __libc_wcschr. [!IS_IN (libc)] (libc_hidden_def): Do not undefine and redefine. * sysdeps/powerpc/powerpc64/multiarch/wcschr.c (wcschr): Rename to __wcschr and define as weak alias of __wcschr. Use libc_hidden_builtin_def. * sysdeps/x86_64/wcschr.S (wcschr): Rename to __wcschr and define as weak alias of __wcschr. Use libc_hidden_weak. * time/alt_digit.c (_nl_get_walt_digit): Use __wcschr instead of wcschr. * time/era.c (_nl_init_era_entries): Likewise. * conform/Makefile (test-xfail-ISO/time.h/linknamespace): Remove variable. (test-xfail-XPG3/time.h/linknamespace): Likewise. (test-xfail-XPG4/time.h/linknamespace): Likewise.
Diffstat (limited to 'wcsmbs/wcschr.c')
| -rw-r--r-- | wcsmbs/wcschr.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/wcsmbs/wcschr.c b/wcsmbs/wcschr.c index 1a35b8044d..bed66a7033 100644 --- a/wcsmbs/wcschr.c +++ b/wcsmbs/wcschr.c @@ -20,6 +20,8 @@ /* Find the first occurrence of WC in WCS. */ #ifdef WCSCHR # define wcschr WCSCHR +#else +# define wcschr __wcschr #endif wchar_t * @@ -35,3 +37,8 @@ wcschr (wcs, wc) return NULL; } libc_hidden_def (wcschr) +#ifndef WCSCHR +# undef wcschr +weak_alias (__wcschr, wcschr) +libc_hidden_weak (wcschr) +#endif |