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authorJoseph Myers <joseph@codesourcery.com>2017-03-16 13:31:57 +0000
committerJoseph Myers <joseph@codesourcery.com>2017-03-16 13:31:57 +0000
commit2072f5c34ede81dde9e0d953d57a0690a66b0f12 (patch)
tree0833e169e1c3e9b24ef64e9010f7bb1e862f7da8 /misc/sys
parentd6fc3f6516cd20f195758086fbbbe3f17a8a6d95 (diff)
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Remove C++ namespace handling from glibc headers.
glibc headers include some code (not particularly consistent or systematic) to put various declarations in C++ namespaces std and __c99, if _GLIBCPP_USE_NAMESPACES is defined. As noted in <https://gcc.gnu.org/ml/libstdc++/2017-03/msg00025.html>, this macro was removed from libstdc++ in 2000. I don't expect compilation with such old versions of libstdc++ to work with current glibc headers anyway (whereas old *binaries* are expected to stay working with current glibc); this patch (which should be a no-op with any libstdc++ version postdating that removal) removes all this code from the glibc headers. The begin-end-check.pl test, whose comments say it is about checking these namespace macro calls, is also removed. The code in that test would have covered __BEGIN_DECLS / __END_DECLS as well, but if those weren't properly matched it would show up with the check-installed-headers-cxx tests, so I don't think there is an actual use for keeping begin-end-check.pl with the namespace code removed. Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by the patch). * misc/sys/cdefs.h (__BEGIN_NAMESPACE_STD): Remove macro. (__END_NAMESPACE_STD): Likewise. (__USING_NAMESPACE_STD): Likewise. (__BEGIN_NAMESPACE_C99): Likewise. (__END_NAMESPACE_C99): Likewise. (__USING_NAMESPACE_C99): Likewise. * math/math.h (_Mdouble_BEGIN_NAMESPACE): Do not define and undefine macro. (_Mdouble_END_NAMESPACE): Likewise. * ctype/ctype.h: Do not handle C++ namespaces. * libio/bits/stdio-ldbl.h: Likewise. * libio/stdio.h: Likewise. * locale/locale.h: Likewise. * math/bits/mathcalls.h: Likewise. * setjmp/setjmp.h: Likewise. * signal/signal.h: Likewise. * stdlib/bits/stdlib-float.h: Likewise. * stdlib/bits/stdlib-ldbl.h: Likewise. * stdlib/stdlib.h: Likewise. * string/string.h: Likewise. * sysdeps/x86/fpu/bits/mathinline.h: Likewise. * time/bits/types/clock_t.h: Likewise. * time/bits/types/struct_tm.h: Likewise. * time/bits/types/time_t.h: Likewise. * time/time.h: Likewise. * wcsmbs/bits/wchar-ldbl.h: Likewise. * wcsmbs/uchar.h: Likewise. * wcsmbs/wchar.h: Likewise. [_GLIBCPP_USE_NAMESPACES] (wint_t): Remove conditional definition. * wctype/wctype.h: Do not handle C++ namespaces. * scripts/begin-end-check.pl: Remove. * Makefile (installed-headers): Likewise. (tests-special): Do not add $(objpfx)begin-end-check.out. ($(objpfx)begin-end-check.out): Remove.
Diffstat (limited to 'misc/sys')
-rw-r--r--misc/sys/cdefs.h25
1 files changed, 0 insertions, 25 deletions
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index e5fe4f89d9..b03ebda22f 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -112,31 +112,6 @@
#endif
-/* The standard library needs the functions from the ISO C90 standard
- in the std namespace. At the same time we want to be safe for
- future changes and we include the ISO C99 code in the non-standard
- namespace __c99. The C++ wrapper header take case of adding the
- definitions to the global namespace. */
-#if defined __cplusplus && defined _GLIBCPP_USE_NAMESPACES
-# define __BEGIN_NAMESPACE_STD namespace std {
-# define __END_NAMESPACE_STD }
-# define __USING_NAMESPACE_STD(name) using std::name;
-# define __BEGIN_NAMESPACE_C99 namespace __c99 {
-# define __END_NAMESPACE_C99 }
-# define __USING_NAMESPACE_C99(name) using __c99::name;
-#else
-/* For compatibility we do not add the declarations into any
- namespace. They will end up in the global namespace which is what
- old code expects. */
-# define __BEGIN_NAMESPACE_STD
-# define __END_NAMESPACE_STD
-# define __USING_NAMESPACE_STD(name)
-# define __BEGIN_NAMESPACE_C99
-# define __END_NAMESPACE_C99
-# define __USING_NAMESPACE_C99(name)
-#endif
-
-
/* Fortify support. */
#define __bos(ptr) __builtin_object_size (ptr, __USE_FORTIFY_LEVEL > 1)
#define __bos0(ptr) __builtin_object_size (ptr, 0)