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authorJoseph Myers <joseph@codesourcery.com>2014-12-10 16:59:02 +0000
committerJoseph Myers <joseph@codesourcery.com>2014-12-10 16:59:02 +0000
commit2cfbdb9a27a8fb08e0249d790a7e6d6053adda59 (patch)
treee92ccf8824e22d57a060529ce9a884b2374f342f /include
parent1b8bf3518186cdc4f22037e5f226c34ffa143b89 (diff)
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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 'include')
-rw-r--r--include/wchar.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/wchar.h b/include/wchar.h
index 8207a53..7b5e1a1 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -85,6 +85,12 @@ libc_hidden_proto (wcscmp)
libc_hidden_proto (wcsftime)
libc_hidden_proto (wcsspn)
libc_hidden_proto (wcschr)
+/* The C++ overloading of wcschr means we have to repeat the type to
+ declare __wcschr instead of using typeof, to avoid errors in C++
+ tests. */
+extern wchar_t *__wcschr (const wchar_t *__wcs, wchar_t __wc)
+ __THROW __attribute_pure__;
+libc_hidden_proto (__wcschr)
libc_hidden_proto (wcscoll)
libc_hidden_proto (wcspbrk)