Mercurial > gnulib
view m4/pwrite.m4 @ 17363:5a51fb7777a9
sys_select, sys_time: port 2013-01-30 Solaris 2.6 fix to Cygwin
Problem reported by Marco Atzeri in
<http://lists.gnu.org/archive/html/bug-gnulib/2013-03/msg00000.html>.
* lib/sys_select.in.h [HAVE_SYS_SELECT_H && _CYGWIN_SYS_TIME_H]:
Simply delegate to the system <sys/select.h> in this case too.
Also, pay attention to _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H only
if OSF/1, since otherwise Cygwin breaks, and it doesn't seem to
be needed on Solaris either.
* lib/sys_time.in.h [_CYGWIN_SYS_TIME_H]:
Simply delgate to the system <sys/time.h> in this case.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Tue, 19 Mar 2013 09:08:47 -0700 |
parents | e542fd46ad6f |
children | 344018b6e5d7 |
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# pwrite.m4 serial 5 dnl Copyright (C) 2010-2013 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_PWRITE], [ AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles dnl Persuade glibc <unistd.h> to declare pwrite(). AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) AC_CHECK_FUNCS_ONCE([pwrite]) if test $ac_cv_func_pwrite = yes; then dnl On HP-UX 11.11 with _FILE_OFFSET_BITS=64, pwrite() on a file does not dnl fail when an invalid (negative) offset is passed and uses an arbitrary dnl offset instead of the argument. AC_CACHE_CHECK([whether pwrite works], [gl_cv_func_pwrite_works], [ dnl Initial guess, used when cross-compiling. changequote(,)dnl case "$host_os" in # Guess no on HP-UX. hpux*) gl_cv_func_pwrite_works="guessing no" ;; # Guess yes otherwise. *) gl_cv_func_pwrite_works="guessing yes" ;; esac changequote([,])dnl gl_save_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS -D_FILE_OFFSET_BITS=64" rm -f conftest.out AC_RUN_IFELSE( [AC_LANG_PROGRAM([[ #include <sys/types.h> #include <unistd.h> #include <fcntl.h> ]], [[ { /* This test fails on HP-UX 11.00..11.11. */ { int fd = open ("conftest.out", O_RDWR | O_CREAT | O_TRUNC, 0600); if (fd < 0) return 1; if (pwrite (fd, "b", 1, (off_t) -1) >= 0) return 2; } /* This test fails on HP-UX 11.00..11.11. */ { int fd; char buf[] = "01"; fd = open ("conftest.out", O_WRONLY | O_CREAT | O_TRUNC, 0600); if (fd < 0) return 3; if (write (fd, buf, 2) < 2) return 4; if (close (fd) < 0) return 5; fd = open ("conftest.out", O_WRONLY, 0600); if (fd < 0) return 6; if (pwrite (fd, "W", 1, (off_t) 0) != 1) return 7; if (close (fd) < 0) return 8; fd = open ("conftest.out", O_RDONLY); if (fd < 0) return 9; if (read (fd, buf, 2) < 2) return 10; if (close (fd) < 0) return 11; if (buf[0] != 'W') return 12; if (buf[1] != '1') return 13; } return 0; }]])], [gl_cv_func_pwrite_works=yes], [gl_cv_func_pwrite_works=no], [:]) rm -f conftest.out CPPFLAGS="$gl_save_CPPFLAGS" ]) case "$gl_cv_func_pwrite_works" in *yes) ;; *) REPLACE_PWRITE=1 ;; esac else HAVE_PWRITE=0 fi ])