Mercurial > gnulib
view m4/isapipe.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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# Test whether a file descriptor is a pipe. dnl Copyright (C) 2006, 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. dnl Written by Paul Eggert. AC_DEFUN([gl_ISAPIPE], [ # OpenVMS has isapipe already, so check for it. AC_CHECK_FUNCS([isapipe]) if test $ac_cv_func_isapipe = yes; then HAVE_ISAPIPE=1 else HAVE_ISAPIPE=0 fi ]) # Prerequisites of lib/isapipe.c. AC_DEFUN([gl_PREREQ_ISAPIPE], [ AC_CACHE_CHECK([whether pipes are FIFOs (and for their link count)], [gl_cv_pipes_are_fifos], [AC_RUN_IFELSE( [AC_LANG_SOURCE( [[#include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #ifndef S_ISFIFO #define S_ISFIFO(m) 0 #endif #ifndef S_ISSOCK #define S_ISSOCK(m) 0 #endif int main (int argc, char **argv) { int fd[2]; struct stat st; if (pipe (fd) != 0) return 1; if (fstat (fd[0], &st) != 0) return 2; if (2 <= argc && argv[1][0] == '-') { char const *yesno = (S_ISFIFO (st.st_mode) ? "yes" : "no"); if (st.st_nlink <= 1) { long int i = st.st_nlink; if (i != st.st_nlink) return 3; printf ("%s (%ld)\n", yesno, i); } else { unsigned long int i = st.st_nlink; if (i != st.st_nlink) return 4; printf ("%s (%lu)\n", yesno, i); } } else { if (! S_ISFIFO (st.st_mode) && ! S_ISSOCK (st.st_mode)) return 5; } return 0; }]])], [gl_cv_pipes_are_fifos=`./conftest$ac_exeext -` test -z "$gl_cv_pipes_are_fifos" && gl_cv_pipes_are_fifos=no], [gl_cv_pipes_are_fifos=unknown], [gl_cv_pipes_are_fifos=cross-compiling])]) case $gl_cv_pipes_are_fifos in #( 'yes ('*')') AC_DEFINE([HAVE_FIFO_PIPES], [1], [Define to 1 if pipes are FIFOs, 0 if sockets. Leave undefined if not known.]);; #( 'no ('*')') AC_DEFINE([HAVE_FIFO_PIPES], [0]);; esac case $gl_cv_pipes_are_fifos in #( *'('*')') AC_DEFINE_UNQUOTED([PIPE_LINK_COUNT_MAX], [`expr "$gl_cv_pipes_are_fifos" : '.*\((.*)\)'`], [Define to the maximum link count that a true pipe can have.]);; esac ])