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| author | Jonathan Wakely <jwakely@redhat.com> | 2021-04-30 15:54:14 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2021-04-30 20:30:46 +0100 |
| commit | 7ddcd26ebb60a8a4b57330442631115cabb6ec22 (patch) | |
| tree | e797c6b35100d8a67d310fb1327ae5c337cc3347 /libstdc++-v3/config.h.in | |
| parent | d8d291f3367230fdfdacc9868b0aa01de1dabb13 (diff) | |
| download | gcc-7ddcd26ebb60a8a4b57330442631115cabb6ec22.zip gcc-7ddcd26ebb60a8a4b57330442631115cabb6ec22.tar.gz gcc-7ddcd26ebb60a8a4b57330442631115cabb6ec22.tar.bz2 | |
libstdc++: Remove GLIBCXX_CHECK_INT64_T checks
This simplifies the definition of std::streamoff by using the predefined
__INT64_TYPE__ macro, instead of the _GLIBCXX_HAVE_INT64_T_LONG,
_GLIBCXX_HAVE_INT64_T_LONG_LONG and _GLIBCXX_HAVE_INT64_T macros defined
by configure.
By using the __INT64_TYPE__ macro (which all of GCC, Clang and Intel
define) we do not need to determine the type of int64_t in configure, we
can just use that type directly.
The background for the change was explained by David Edelsohn:
Currently the type of streamoff is determined at libstdc++ configure
time, chosen by the definitions of _GLIBCXX_HAVE_INT64_T_LONG and
_GLIBCXX_HAVE_INT64_T_LONG_LONG. For a multilib configuration, the
difference is encoded in the different multilib header file paths.
For "FAT" library targets that package 32 bit and 64 bit libraries
together, G++ also expects a single header file directory hierarchy,
causing an incorrect value for streamoff in some situations.
And in a subsequent mail:
Most of the libstdc++ headers are architecture-neutral, OS neutral and
ABI neutral. The differences are localized in bits/c++config.h. And
most of c++config.h is identical for 32 bit AIX and 64 bit AIX. The
only differences that matter are __int128 and __int64_t.
This change removes some of those differences. With the only uses of the
INT64_T configure macros removed, the configure checks themselves can
also be removed.
Co-authored-by: David Edelsohn <dje.gcc@gmail.com>
libstdc++-v3/ChangeLog:
* acinclude.m4 (GLIBCXX_CHECK_INT64_T): Delete.
* config.h.in: Regenerate.
* configure: Regenerate.
* configure.ac: Do not use GLIBCXX_CHECK_INT64_T.
* include/bits/postypes.h: Remove include of <stdint.h> and
definition/undefinition of the __STDC_LIMIT_MACROS and
__STDC_CONSTANT_MACROS macros.
(streamoff): Use __INT64_TYPE__ if defined.
Diffstat (limited to 'libstdc++-v3/config.h.in')
| -rw-r--r-- | libstdc++-v3/config.h.in | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in index 37b56b8..197e8e6 100644 --- a/libstdc++-v3/config.h.in +++ b/libstdc++-v3/config.h.in @@ -153,15 +153,6 @@ /* Define to 1 if you have the <ieeefp.h> header file. */ #undef HAVE_IEEEFP_H -/* Define if int64_t is available in <stdint.h>. */ -#undef HAVE_INT64_T - -/* Define if int64_t is a long. */ -#undef HAVE_INT64_T_LONG - -/* Define if int64_t is a long long. */ -#undef HAVE_INT64_T_LONG_LONG - /* Define to 1 if you have the <inttypes.h> header file. */ #undef HAVE_INTTYPES_H |