1 # Configure a replacement for <strings.h>.
4 # Copyright (C) 2007, 2009-2020 Free Software Foundation, Inc.
5 # This file is free software; the Free Software Foundation
6 # gives unlimited permission to copy and/or distribute it,
7 # with or without modifications, as long as this notice is preserved.
9 AC_DEFUN([gl_HEADER_STRINGS_H],
11 dnl Use AC_REQUIRE here, so that the default behavior below is expanded
12 dnl once only, before all statements that occur in other macros.
13 AC_REQUIRE([gl_HEADER_STRINGS_H_BODY])
16 AC_DEFUN([gl_HEADER_STRINGS_H_BODY],
18 AC_REQUIRE([gl_HEADER_STRINGS_H_DEFAULTS])
20 gl_CHECK_NEXT_HEADERS([strings.h])
21 if test $ac_cv_header_strings_h = yes; then
26 AC_SUBST([HAVE_STRINGS_H])
28 dnl Check for declarations of anything we want to poison if the
29 dnl corresponding gnulib module is not in use.
30 gl_WARN_ON_USE_PREPARE([[
31 /* Minix 3.1.8 has a bug: <sys/types.h> must be included before
33 #include <sys/types.h>
35 ]], [ffs strcasecmp strncasecmp])
38 AC_DEFUN([gl_STRINGS_MODULE_INDICATOR],
40 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
41 AC_REQUIRE([gl_HEADER_STRINGS_H_DEFAULTS])
42 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
45 AC_DEFUN([gl_HEADER_STRINGS_H_DEFAULTS],
47 GNULIB_FFS=0; AC_SUBST([GNULIB_FFS])
48 dnl Assume proper GNU behavior unless another module says otherwise.
49 HAVE_FFS=1; AC_SUBST([HAVE_FFS])
50 HAVE_STRCASECMP=1; AC_SUBST([HAVE_STRCASECMP])
51 HAVE_DECL_STRNCASECMP=1; AC_SUBST([HAVE_DECL_STRNCASECMP])