110 lines
3.2 KiB
Text
110 lines
3.2 KiB
Text
|
# getline.m4 serial 30
|
||
|
|
|
||
|
|
dnl Copyright (C) 1998-2003, 2005-2007, 2009-2021 Free Software Foundation,
|
||
|
|
dnl Inc.
|
||
|
|
dnl
|
||
|
|
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_PREREQ([2.59])
|
||
|
|
|
||
|
|
dnl See if there's a working, system-supplied version of the getline function.
|
||
|
|
dnl We can't just do AC_REPLACE_FUNCS([getline]) because some systems
|
||
|
|
dnl have a function by that name in -linet that doesn't have anything
|
||
|
|
dnl to do with the function we need.
|
||
|
|
AC_DEFUN([gl_FUNC_GETLINE],
|
||
|
|
[
|
||
|
|
AC_REQUIRE([gl_STDIO_H_DEFAULTS])
|
||
|
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
|
|
||
|
|
dnl Persuade glibc <stdio.h> to declare getline().
|
||
|
|
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
|
||
|
|
|
||
|
|
AC_CHECK_DECLS_ONCE([getline])
|
||
|
|
|
||
|
|
gl_getline_needs_run_time_check=no
|
||
|
|
AC_CHECK_FUNC([getline],
|
||
|
|
[dnl Found it in some library. Verify that it works.
|
||
|
|
gl_getline_needs_run_time_check=yes],
|
||
|
|
[am_cv_func_working_getline=no])
|
||
|
|
if test $gl_getline_needs_run_time_check = yes; then
|
||
|
|
AC_CACHE_CHECK([for working getline function],
|
||
|
|
[am_cv_func_working_getline],
|
||
|
|
[echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
|
||
|
|
AC_RUN_IFELSE([AC_LANG_SOURCE([[
|
||
|
|
# include <stdio.h>
|
||
|
|
# include <stdlib.h>
|
||
|
|
# include <string.h>
|
||
|
|
int main ()
|
||
|
|
{
|
||
|
|
FILE *in = fopen ("./conftest.data", "r");
|
||
|
|
if (!in)
|
||
|
|
return 1;
|
||
|
|
{
|
||
|
|
/* Test result for a NULL buffer and a zero size.
|
||
|
|
Based on a test program from Karl Heuer. */
|
||
|
|
char *line = NULL;
|
||
|
|
size_t siz = 0;
|
||
|
|
int len = getline (&line, &siz, in);
|
||
|
|
if (!(len == 4 && line && strcmp (line, "foo\n") == 0))
|
||
|
|
{ free (line); fclose (in); return 2; }
|
||
|
|
free (line);
|
||
|
|
}
|
||
|
|
{
|
||
|
|
/* Test result for a NULL buffer and a non-zero size.
|
||
|
|
This crashes on FreeBSD 8.0. */
|
||
|
|
char *line = NULL;
|
||
|
|
size_t siz = (size_t)(~0) / 4;
|
||
|
|
if (getline (&line, &siz, in) == -1)
|
||
|
|
{ fclose (in); return 3; }
|
||
|
|
free (line);
|
||
|
|
}
|
||
|
|
fclose (in);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
]])],
|
||
|
|
[am_cv_func_working_getline=yes],
|
||
|
|
[am_cv_func_working_getline=no],
|
||
|
|
[dnl We're cross compiling.
|
||
|
|
dnl Guess it works on glibc2 systems and musl systems.
|
||
|
|
AC_EGREP_CPP([Lucky GNU user],
|
||
|
|
[
|
||
|
|
#include <features.h>
|
||
|
|
#ifdef __GNU_LIBRARY__
|
||
|
|
#if (__GLIBC__ >= 2) && !defined __UCLIBC__
|
||
|
|
Lucky GNU user
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
],
|
||
|
|
[am_cv_func_working_getline="guessing yes"],
|
||
|
|
[case "$host_os" in
|
||
|
|
*-musl*) am_cv_func_working_getline="guessing yes" ;;
|
||
|
|
*) am_cv_func_working_getline="$gl_cross_guess_normal" ;;
|
||
|
|
esac
|
||
|
|
])
|
||
|
|
])
|
||
|
|
])
|
||
|
|
fi
|
||
|
|
|
||
|
|
if test $ac_cv_have_decl_getline = no; then
|
||
|
|
HAVE_DECL_GETLINE=0
|
||
|
|
fi
|
||
|
|
|
||
|
|
case "$am_cv_func_working_getline" in
|
||
|
|
*yes) ;;
|
||
|
|
*)
|
||
|
|
dnl Set REPLACE_GETLINE always: Even if we have not found the broken
|
||
|
|
dnl getline function among $LIBS, it may exist in libinet and the
|
||
|
|
dnl executable may be linked with -linet.
|
||
|
|
REPLACE_GETLINE=1
|
||
|
|
;;
|
||
|
|
esac
|
||
|
|
])
|
||
|
|
|
||
|
|
# Prerequisites of lib/getline.c.
|
||
|
|
AC_DEFUN([gl_PREREQ_GETLINE],
|
||
|
|
[
|
||
|
|
:
|
||
|
|
])
|