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| author | Paolo Carlini <pcarlini@unitus.it> | 2003-07-14 20:23:12 +0200 |
|---|---|---|
| committer | Paolo Carlini <paolo@gcc.gnu.org> | 2003-07-14 18:23:12 +0000 |
| commit | bda243ec50619e4b80e35a8c77a9ebc44647ca38 (patch) | |
| tree | 11c82ea18a45d7f42a2a512635da67b8184d3c7a /libstdc++-v3/aclocal.m4 | |
| parent | 19948e32a8be1a439f58c2d34a7f0b03ec03b85c (diff) | |
| download | gcc-bda243ec50619e4b80e35a8c77a9ebc44647ca38.zip gcc-bda243ec50619e4b80e35a8c77a9ebc44647ca38.tar.gz gcc-bda243ec50619e4b80e35a8c77a9ebc44647ca38.tar.bz2 | |
Nathan C.
2003-07-14 Paolo Carlini <pcarlini@unitus.it>
Nathan C. Myers <ncm-nospam@cantrip.org>
PR libstdc++/11378
* include/std/std_fstream.h (xsputn): Declare only.
* include/bits/fstream.tcc (xsputn): Define, optimize for the
always_noconv() case: when __n is sufficiently large flush
the buffer and issue a direct write, if possible combining the
two with writev in __basic_file<>::xsputn_2.
* config/io/basic_file_stdio.h (__basic_file<>::xsputn_2):
New, declare.
* config/io/basic_file_stdio.cc (__basic_file<>::xsputn_2):
Define.
* acinclude.m4 (GLIBCXX_CHECK_WRITE): New macro, checking for
the availability of writev in <sys/uio.h>.
* configure.in: Call here.
* acconfig.h: Add undef for the corresponding symbol.
* aclocal.m4: Regenerate.
* configure: Regenerate.
* config.h.in: Regenerate.
* testsuite/27_io/basic_filebuf/setbuf/char/3.cc: Tweak.
* include/std/std_fstream.h (sync): Constify a variable.
Co-Authored-By: Nathan C. Myers <ncm-nospam@cantrip.org>
From-SVN: r69341
Diffstat (limited to 'libstdc++-v3/aclocal.m4')
| -rw-r--r-- | libstdc++-v3/aclocal.m4 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libstdc++-v3/aclocal.m4 b/libstdc++-v3/aclocal.m4 index b0cdfd9..f5677b8 100644 --- a/libstdc++-v3/aclocal.m4 +++ b/libstdc++-v3/aclocal.m4 @@ -2174,6 +2174,23 @@ AC_DEFUN(GLIBCXX_CHECK_POLL, [ fi ]) +dnl +dnl Check whether writev is available in <sys/uio.h>. +dnl + +AC_DEFUN(GLIBCXX_CHECK_WRITEV, [ + AC_CACHE_VAL(glibcxx_cv_WRITEV, [ + AC_TRY_COMPILE([#include <sys/uio.h>], + [struct iovec iov[2]; writev(0, iov, 0); ], + [glibcxx_cv_WRITEV=yes], + [glibcxx_cv_WRITEV=no]) + ]) + if test x$glibcxx_cv_WRITEV = xyes; then + AC_DEFINE(HAVE_WRITEV) + fi +]) + + # Check whether LC_MESSAGES is available in <locale.h>. # Ulrich Drepper <drepper@cygnus.com>, 1995. # |