Mercurial > gnulib
view m4/pwrite.m4 @ 40177:dcd889592b62
dtoastr,ftoastr,ldtoastr: port to c-strtod changes
Decouple these modules from c-strtod. Nowadays it’s reasonable to
assume the C99 signatures for strtod and strtold. Programs that
require stricter adherence to C99 should also use the strtod and
strtold modules as needed, and we no longer need the
HAVE_C99_STRTOLD macro.
* NEWS: Mention this.
* lib/ftoastr.c (STRTOF) [LENGTH == 3]: Assume strtold.
* m4/c-strtod.m4 (gl_C_STRTOLD): Do not define HAVE_C99_STRTOLD.
* modules/dtoastr, modules/ftoastr, modules/ldtoastr:
(Files): Remove m4/c-strtod.m4.
(configure.ac): Do not require gl_C99_STRTOLD, which no longer
exists.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Sat, 02 Feb 2019 13:01:55 -0800 |
parents | b06060465f09 |
children |
line wrap: on
line source
# pwrite.m4 serial 5 dnl Copyright (C) 2010-2019 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 ])