# 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 "$LIBICONV"; then dnl First, try to link without -liconv. libunistring often depends on dnl libiconv, but we don't know (and often don't need to know) where dnl libiconv is installed. AC_LIB_HAVE_LINKFLAGS([unistring], [], [#include ], [u8_strconv_from_locale((char*)0);], [no, trying again together with libiconv]) if test "$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 $LIBICONV" AC_LIB_HAVE_LINKFLAGS([unistring], [], [#include ], [u8_strconv_from_locale((char*)0);], [no, consider installing GNU libunistring]) if test -n "$LIBUNISTRING"; then LIBUNISTRING="$LIBUNISTRING $LIBICONV" LTLIBUNISTRING="$LTLIBUNISTRING $LTLIBICONV" fi LIBS="$glus_save_LIBS" fi else AC_LIB_HAVE_LINKFLAGS([unistring], [], [#include ], [u8_strconv_from_locale((char*)0);], [no, consider installing GNU libunistring]) fi ])