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# libunistring.m4 serial 5
dnl Copyright (C) 2009-2010 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.
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 and augments the CPPFLAGS variable, and
dnl #defines HAVE_LIBUNISTRING to 1. Otherwise, it sets and AC_SUBSTs
dnl HAVE_LIBUNISTRING=no and LIBUNISTRING and LTLIBUNISTRING to empty.
AC_DEFUN([gl_LIBUNISTRING],
[
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_save_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_save_LIBS"
fi
else
AC_LIB_HAVE_LINKFLAGS([unistring], [],
[#include <uniconv.h>], [u8_strconv_from_locale((char*)0);],
[no, consider installing GNU libunistring])
fi
])
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