63 lines
2.1 KiB
Plaintext
63 lines
2.1 KiB
Plaintext
# Configure a replacement for <strings.h>.
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# serial 9
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# Copyright (C) 2007, 2009-2023 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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AC_DEFUN_ONCE([gl_STRINGS_H],
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[
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dnl Ensure to expand the default settings once only, before all statements
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dnl that occur in other macros.
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AC_REQUIRE([gl_STRINGS_H_DEFAULTS])
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gl_CHECK_NEXT_HEADERS([strings.h])
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if test $ac_cv_header_strings_h = yes; then
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HAVE_STRINGS_H=1
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else
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HAVE_STRINGS_H=0
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fi
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AC_SUBST([HAVE_STRINGS_H])
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dnl Check for declarations of anything we want to poison if the
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dnl corresponding gnulib module is not in use.
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gl_WARN_ON_USE_PREPARE([[
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/* Minix 3.1.8 has a bug: <sys/types.h> must be included before
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<strings.h>. */
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#include <sys/types.h>
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#include <strings.h>
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]], [ffs strcasecmp strncasecmp])
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])
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# gl_STRINGS_MODULE_INDICATOR([modulename])
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# sets the shell variable that indicates the presence of the given module
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# to a C preprocessor expression that will evaluate to 1.
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# This macro invocation must not occur in macros that are AC_REQUIREd.
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AC_DEFUN([gl_STRINGS_MODULE_INDICATOR],
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[
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dnl Ensure to expand the default settings once only.
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gl_STRINGS_H_REQUIRE_DEFAULTS
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gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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])
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# Initializes the default values for AC_SUBSTed shell variables.
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# This macro must not be AC_REQUIREd. It must only be invoked, and only
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# outside of macros or in macros that are not AC_REQUIREd.
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AC_DEFUN([gl_STRINGS_H_REQUIRE_DEFAULTS],
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[
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m4_defun(GL_MODULE_INDICATOR_PREFIX[_STRINGS_H_MODULE_INDICATOR_DEFAULTS], [
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gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FFS])
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])
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m4_require(GL_MODULE_INDICATOR_PREFIX[_STRINGS_H_MODULE_INDICATOR_DEFAULTS])
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AC_REQUIRE([gl_STRINGS_H_DEFAULTS])
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])
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AC_DEFUN([gl_STRINGS_H_DEFAULTS],
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[
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dnl Assume proper GNU behavior unless another module says otherwise.
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HAVE_FFS=1; AC_SUBST([HAVE_FFS])
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HAVE_STRCASECMP=1; AC_SUBST([HAVE_STRCASECMP])
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HAVE_DECL_STRNCASECMP=1; AC_SUBST([HAVE_DECL_STRNCASECMP])
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])
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