2 dnl Copyright (C) 2003-2020 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
9 AC_REQUIRE([AC_C_INLINE])
10 AC_REQUIRE([AC_C_RESTRICT])
11 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
13 AC_CHECK_DECLS([program_invocation_name],
15 [AC_DEFINE([GNULIB_PROGRAM_INVOCATION_NAME], [1],
16 [Define to 1 to add extern declaration of program_invocation_name to argp.h])],
17 [[#include <errno.h>]])
18 AC_CHECK_DECLS([program_invocation_short_name],
20 [AC_DEFINE([GNULIB_PROGRAM_INVOCATION_SHORT_NAME], [1],
21 [Define to 1 to add extern declaration of program_invocation_short_name to argp.h])],
22 [[#include <errno.h>]])
24 # Check if program_invocation_name and program_invocation_short_name
25 # are defined elsewhere. It is improbable that only one of them will
26 # be defined and other not, I prefer to stay on the safe side and to
27 # test each one separately.
28 AC_MSG_CHECKING([whether program_invocation_name is defined])
31 [[extern char *program_invocation_name;]],
32 [[program_invocation_name = "test";]])],
33 [AC_DEFINE([HAVE_PROGRAM_INVOCATION_NAME], [1],
34 [Define if program_invocation_name is defined])
37 [AC_MSG_RESULT([no])])
39 AC_MSG_CHECKING([whether program_invocation_short_name is defined])
42 [[extern char *program_invocation_short_name;]],
43 [[program_invocation_short_name = "test";]])],
44 [AC_DEFINE([HAVE_PROGRAM_INVOCATION_SHORT_NAME], [1],
45 [Define if program_invocation_short_name is defined])
48 [AC_MSG_RESULT([no])])
50 AC_CHECK_DECLS_ONCE([clearerr_unlocked])
51 AC_CHECK_DECLS_ONCE([feof_unlocked])
52 AC_CHECK_DECLS_ONCE([ferror_unlocked])
53 AC_CHECK_DECLS_ONCE([fflush_unlocked])
54 AC_CHECK_DECLS_ONCE([fgets_unlocked])
55 AC_CHECK_DECLS_ONCE([fputc_unlocked])
56 AC_CHECK_DECLS_ONCE([fputs_unlocked])
57 AC_CHECK_DECLS_ONCE([fread_unlocked])
58 AC_CHECK_DECLS_ONCE([fwrite_unlocked])
59 AC_CHECK_DECLS_ONCE([getc_unlocked])
60 AC_CHECK_DECLS_ONCE([getchar_unlocked])
61 AC_CHECK_DECLS_ONCE([putc_unlocked])
62 AC_CHECK_DECLS_ONCE([putchar_unlocked])
63 AC_CHECK_FUNCS_ONCE([flockfile funlockfile])
64 AC_CHECK_HEADERS_ONCE([features.h linewrap.h])
65 AC_REQUIRE([AC_FUNC_STRERROR_R])
68 dnl argp-parse.c depends on GNU getopt internals, therefore use GNU getopt
70 AC_DEFUN([gl_REPLACE_GETOPT_ALWAYS], [])