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+# argp.m4 serial 14
+dnl Copyright (C) 2003-2015 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_ARGP],
+[
+ AC_REQUIRE([AC_C_INLINE])
+ AC_REQUIRE([AC_C_RESTRICT])
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+ AC_CHECK_DECLS([program_invocation_name], [],
+ [AC_DEFINE([GNULIB_PROGRAM_INVOCATION_NAME], [1],
+ [Define to 1 to add extern declaration of program_invocation_name to argp.h])],
+ [[#include <errno.h>]])
+ AC_CHECK_DECLS([program_invocation_short_name], [],
+ [AC_DEFINE([GNULIB_PROGRAM_INVOCATION_SHORT_NAME], [1],
+ [Define to 1 to add extern declaration of program_invocation_short_name to argp.h])],
+ [[#include <errno.h>]])
+
+ # Check if program_invocation_name and program_invocation_short_name
+ # are defined elsewhere. It is improbable that only one of them will
+ # be defined and other not, I prefer to stay on the safe side and to
+ # test each one separately.
+ AC_MSG_CHECKING([whether program_invocation_name is defined])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <argp.h>]],
+ [[program_invocation_name = "test";]])],
+ [AC_DEFINE([HAVE_PROGRAM_INVOCATION_NAME], [1],
+ [Define if program_invocation_name is defined])
+ AC_MSG_RESULT([yes])],
+ [AC_MSG_RESULT([no])])
+
+ AC_MSG_CHECKING([whether program_invocation_short_name is defined])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <argp.h>]],
+ [[program_invocation_short_name = "test";]])],
+ [AC_DEFINE([HAVE_PROGRAM_INVOCATION_SHORT_NAME], [1],
+ [Define if program_invocation_short_name is defined])
+ AC_MSG_RESULT([yes])],
+ [AC_MSG_RESULT([no])])
+
+ AC_CHECK_DECLS_ONCE([clearerr_unlocked])
+ AC_CHECK_DECLS_ONCE([feof_unlocked])
+ AC_CHECK_DECLS_ONCE([ferror_unlocked])
+ AC_CHECK_DECLS_ONCE([fflush_unlocked])
+ AC_CHECK_DECLS_ONCE([fgets_unlocked])
+ AC_CHECK_DECLS_ONCE([fputc_unlocked])
+ AC_CHECK_DECLS_ONCE([fputs_unlocked])
+ AC_CHECK_DECLS_ONCE([fread_unlocked])
+ AC_CHECK_DECLS_ONCE([fwrite_unlocked])
+ AC_CHECK_DECLS_ONCE([getc_unlocked])
+ AC_CHECK_DECLS_ONCE([getchar_unlocked])
+ AC_CHECK_DECLS_ONCE([putc_unlocked])
+ AC_CHECK_DECLS_ONCE([putchar_unlocked])
+ AC_CHECK_FUNCS_ONCE([flockfile funlockfile])
+ AC_CHECK_HEADERS_ONCE([features.h linewrap.h])
+])
+
+dnl argp-parse.c depends on GNU getopt internals, therefore use GNU getopt
+dnl always.
+AC_DEFUN([gl_REPLACE_GETOPT_ALWAYS], [])