-#serial 4
+# getline.m4 serial 15
+
+dnl Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006 Free Software
+dnl Foundation, 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(2.52)
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(AM_FUNC_GETLINE,
-[dnl
- am_getline_needs_run_time_check=no
+AC_DEFUN([gl_FUNC_GETLINE],
+[
+ dnl Persuade glibc <stdio.h> to declare getline().
+ AC_REQUIRE([AC_GNU_SOURCE])
+
+ AC_CHECK_DECLS([getline])
+
+ gl_getline_needs_run_time_check=no
AC_CHECK_FUNC(getline,
dnl Found it in some library. Verify that it works.
- am_getline_needs_run_time_check=yes,
+ gl_getline_needs_run_time_check=yes,
am_cv_func_working_getline=no)
- if test $am_getline_needs_run_time_check = yes; then
- AC_CHECK_HEADERS(string.h)
+ if test $gl_getline_needs_run_time_check = yes; then
AC_CACHE_CHECK([for working getline function], am_cv_func_working_getline,
[echo fooN |tr -d '\012'|tr N '\012' > conftest.data
AC_TRY_RUN([
# include <stdio.h>
-# include <sys/types.h>
-# if HAVE_STRING_H
-# include <string.h>
-# endif
+# include <stdlib.h>
+# include <string.h>
int main ()
{ /* Based on a test program from Karl Heuer. */
char *line = NULL;
}
], am_cv_func_working_getline=yes dnl The library version works.
, am_cv_func_working_getline=no dnl The library version does NOT work.
- , am_cv_func_working_getline=no dnl We're cross compiling.
+ , dnl We're cross compiling. Assume it works on glibc2 systems.
+ [AC_EGREP_CPP([Lucky GNU user],
+ [
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+ #if (__GLIBC__ >= 2)
+ Lucky GNU user
+ #endif
+#endif
+ ],
+ [am_cv_func_working_getline=yes],
+ [am_cv_func_working_getline=no])]
)])
fi
if test $am_cv_func_working_getline = no; then
- AC_LIBOBJ([getline])
+ dnl We must choose a different name for our function, since on ELF systems
+ dnl a broken getline() in libc.so would override our getline() in
+ dnl libgettextlib.so.
+ AC_DEFINE([getline], [gnu_getline],
+ [Define to a replacement function name for getline().])
+ AC_LIBOBJ(getline)
+
+ gl_PREREQ_GETLINE
fi
])
+
+# Prerequisites of lib/getline.c.
+AC_DEFUN([gl_PREREQ_GETLINE],
+[
+ gl_FUNC_GETDELIM
+])