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m4/libunistring.m4
143 строки
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Tim Rühsen
Add configure flag --with-libunistring-prefix
25 мар 2024, 20:26
25 мар 2024, 20:26
d0967ae
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# libunistring.m4 serial 13 dnl Copyright (C) 2009-2024 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_PREREQ([2.64]) dnl gl_LIBUNISTRING dnl Searches for an installed libunistring. dnl If found, it sets and AC_SUBSTs HAVE_LIBUNISTRING=yes and the LIBUNISTRING dnl and LTLIBUNISTRING variables, sets the LIBUNISTRING_VERSION variable, and dnl augments the CPPFLAGS variable, and #defines HAVE_LIBUNISTRING to 1. dnl Otherwise, it sets and AC_SUBSTs HAVE_LIBUNISTRING=no and LIBUNISTRING and dnl LTLIBUNISTRING to empty. dnl Define gl_LIBUNISTRING using AC_DEFUN_ONCE, in order dnl to avoid warnings dnl like dnl "warning: AC_REQUIRE: `gl_LIBUNISTRING' was expanded before it was required". dnl This is tricky because of the way 'aclocal' is implemented: dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN. dnl Otherwise aclocal's initial scan pass would miss the macro definition. dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions. dnl Otherwise aclocal would emit many "Use of uninitialized value $1" dnl warnings. AC_DEFUN_ONCE([gl_LIBUNISTRING], [ AC_BEFORE([$0], [gl_LIBUNISTRING_MODULE]) AC_BEFORE([$0], [gl_LIBUNISTRING_LIBHEADER]) AC_BEFORE([$0], [gl_LIBUNISTRING_LIB_PREPARE]) m4_ifdef([gl_LIBUNISTRING_OPTIONAL], [ AC_MSG_CHECKING([whether included libunistring is requested]) AC_ARG_WITH([included-libunistring], [ --with-included-libunistring use the libunistring parts included here], [gl_libunistring_force_included=$withval], [gl_libunistring_force_included=no]) AC_MSG_RESULT([$gl_libunistring_force_included]) gl_libunistring_use_included="$gl_libunistring_force_included" if test "$gl_libunistring_use_included" = yes; then dnl Assume that libunistring is not installed until some other macro dnl explicitly invokes gl_LIBUNISTRING_CORE. if test -z "$HAVE_LIBUNISTRING"; then HAVE_LIBUNISTRING=no fi LIBUNISTRING= LTLIBUNISTRING= else gl_LIBUNISTRING_CORE if test $HAVE_LIBUNISTRING = no; then gl_libunistring_use_included=yes LIBUNISTRING= LTLIBUNISTRING= fi fi ], [gl_LIBUNISTRING_CORE]) ]) AC_DEFUN([gl_LIBUNISTRING_CORE], [ AC_REQUIRE([AM_ICONV]) if test -n "$LIBICONV"; then dnl First, try to link without -liconv. libunistring often depends on dnl libiconv, but we don't know (and often don't need to know) where dnl libiconv is installed. AC_LIB_HAVE_LINKFLAGS([unistring], [], [#include <uniconv.h>], [u8_strconv_from_locale((char*)0);], [no, trying again together with libiconv]) if test "$ac_cv_libunistring" != yes; then dnl Second try, with -liconv. dnl We have to erase the cached result of the first AC_LIB_HAVE_LINKFLAGS dnl invocation, otherwise the second one will not be run. unset ac_cv_libunistring glus_saved_LIBS="$LIBS" LIBS="$LIBS $LIBICONV" AC_LIB_HAVE_LINKFLAGS([unistring], [], [#include <uniconv.h>], [u8_strconv_from_locale((char*)0);], [no, consider installing GNU libunistring]) if test -n "$LIBUNISTRING"; then LIBUNISTRING="$LIBUNISTRING $LIBICONV" LTLIBUNISTRING="$LTLIBUNISTRING $LTLIBICONV" fi LIBS="$glus_saved_LIBS" fi else AC_LIB_HAVE_LINKFLAGS([unistring], [], [#include <uniconv.h>], [u8_strconv_from_locale((char*)0);], [no, consider installing GNU libunistring]) fi if test $HAVE_LIBUNISTRING = yes; then dnl Determine the installed version. AC_CACHE_CHECK([for libunistring version], [gl_cv_libunistring_version], [AC_COMPUTE_INT([gl_libunistring_hexversion], [_LIBUNISTRING_VERSION], [#include <unistring/version.h>]) dnl Versions <= 0.9.3 had a hexversion of 0x0009. dnl Use other tests to distinguish them. if test $gl_libunistring_hexversion = 9; then dnl Version 0.9.2 introduced the header <unistring/cdefs.h>. AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([[#include <unistring/cdefs.h>]], [[]])], [gl_cv_libunistring_version092=true], [gl_cv_libunistring_version092=false]) if $gl_cv_libunistring_version092; then dnl Version 0.9.3 changed a comment in <unistr.h>. gl_ABSOLUTE_HEADER_ONE([unistr.h]) if test -n "$gl_cv_absolute_unistr_h" \ && grep 'Copy no more than N units of SRC to DEST. Return a pointer' $gl_cv_absolute_unistr_h > /dev/null; then dnl Detected version 0.9.3. gl_libunistring_hexversion=2307 else dnl Detected version 0.9.2. gl_libunistring_hexversion=2306 fi else dnl Version 0.9.1 introduced the type casing_suffix_context_t. AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[#include <unicase.h> casing_suffix_context_t ct;]], [[]])], [gl_cv_libunistring_version091=true], [gl_cv_libunistring_version091=false]) if $gl_cv_libunistring_version091; then dnl Detected version 0.9.1. gl_libunistring_hexversion=2305 else dnl Detected version 0.9. gl_libunistring_hexversion=2304 fi fi fi dnl Transform into the usual major.minor.subminor notation. gl_libunistring_major=`expr $gl_libunistring_hexversion / 65536` gl_libunistring_minor=`expr $gl_libunistring_hexversion / 256 % 256` gl_libunistring_subminor=`expr $gl_libunistring_hexversion % 256` gl_cv_libunistring_version="$gl_libunistring_major.$gl_libunistring_minor.$gl_libunistring_subminor" ]) LIBUNISTRING_VERSION="$gl_cv_libunistring_version" fi ])