Mercurial > gnulib
view m4/lseek.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 |
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# lseek.m4 serial 10 dnl Copyright (C) 2007, 2009-2019 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_LSEEK], [ AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) AC_REQUIRE([AC_CANONICAL_HOST]) AC_REQUIRE([AC_PROG_CC]) AC_CHECK_HEADERS_ONCE([unistd.h]) AC_CACHE_CHECK([whether lseek detects pipes], [gl_cv_func_lseek_pipe], [case "$host_os" in mingw*) dnl Native Windows. dnl The result of lseek (fd, (off_t)0, SEEK_CUR) or dnl SetFilePointer(handle, 0, NULL, FILE_CURRENT) dnl for a pipe depends on the environment: In a Cygwin 1.5 dnl environment it succeeds (wrong); in a Cygwin 1.7 environment dnl it fails with a wrong errno value. gl_cv_func_lseek_pipe=no ;; *) if test $cross_compiling = no; then AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> /* for off_t */ #include <stdio.h> /* for SEEK_CUR */ #if HAVE_UNISTD_H # include <unistd.h> #else /* on Windows with MSVC */ # include <io.h> #endif ]], [[ /* Exit with success only if stdin is seekable. */ return lseek (0, (off_t)0, SEEK_CUR) < 0; ]])], [if test -s conftest$ac_exeext \ && ./conftest$ac_exeext < conftest.$ac_ext \ && test 1 = "`echo hi \ | { ./conftest$ac_exeext; echo $?; cat >/dev/null; }`"; then gl_cv_func_lseek_pipe=yes else gl_cv_func_lseek_pipe=no fi ], [gl_cv_func_lseek_pipe=no]) else AC_COMPILE_IFELSE( [AC_LANG_SOURCE([[ #if defined __BEOS__ /* BeOS mistakenly return 0 when trying to seek on pipes. */ Choke me. #endif]])], [gl_cv_func_lseek_pipe=yes], [gl_cv_func_lseek_pipe=no]) fi ;; esac ]) if test $gl_cv_func_lseek_pipe = no; then REPLACE_LSEEK=1 AC_DEFINE([LSEEK_PIPE_BROKEN], [1], [Define to 1 if lseek does not detect pipes.]) fi AC_REQUIRE([gl_SYS_TYPES_H]) if test $WINDOWS_64_BIT_OFF_T = 1; then REPLACE_LSEEK=1 fi ])