added ICU M4 macros for autoconf

diff --git a/ac_check_icu.m4 b/ac_check_icu.m4
new file mode 100644 (file)
index 0000000..641f77d
--- /dev/null
+++ b/ac_check_icu.m4
@@ -0,0 +1,73 @@
+##### http://autoconf-archive.cryp.to/ac_check_icu.html
+#
+# SYNOPSIS
+#
+#   AC_CHECK_ICU(version, action-if, action-if-not)
+#
+# DESCRIPTION
+#
+#   Defines ICU_LIBS, ICU_CFLAGS, ICU_CXXFLAGS. See icu-config(1) man
+#   page.
+#
+# LAST MODIFICATION
+#
+#   2005-09-20
+#
+# COPYLEFT
+#
+#   Copyright (c) 2005 Akos Maroy <darkeye@tyrell.hu>
+#
+#   Copying and distribution of this file, with or without
+#   modification, are permitted in any medium without royalty provided
+#   the copyright notice and this notice are preserved.
+
+AC_DEFUN([AC_CHECK_ICU], [
+  succeeded=no
+
+  if test -z "$ICU_CONFIG"; then
+    AC_PATH_PROG(ICU_CONFIG, icu-config, no)
+  fi
+
+  if test "$ICU_CONFIG" = "no" ; then
+    echo "*** The icu-config script could not be found. Make sure it is"
+    echo "*** in your path, and that taglib is properly installed."
+    echo "*** Or see http://ibm.com/software/globalization/icu/"
+  else
+    ICU_VERSION=`$ICU_CONFIG --version`
+    AC_MSG_CHECKING(for ICU >= $1)
+        VERSION_CHECK=`expr $ICU_VERSION \>\= $1`
+        if test "$VERSION_CHECK" = "1" ; then
+            AC_MSG_RESULT(yes)
+            succeeded=yes
+
+            AC_MSG_CHECKING(ICU_CFLAGS)
+            ICU_CFLAGS=`$ICU_CONFIG --cflags`
+            AC_MSG_RESULT($ICU_CFLAGS)
+
+            AC_MSG_CHECKING(ICU_CXXFLAGS)
+            ICU_CXXFLAGS=`$ICU_CONFIG --cxxflags`
+            AC_MSG_RESULT($ICU_CXXFLAGS)
+
+            AC_MSG_CHECKING(ICU_LIBS)
+            ICU_LIBS=`$ICU_CONFIG --ldflags`
+            AC_MSG_RESULT($ICU_LIBS)
+        else
+            ICU_CFLAGS=""
+            ICU_CXXFLAGS=""
+            ICU_LIBS=""
+            ## If we have a custom action on failure, don't print errors, but
+            ## do set a variable so people can do so.
+            ifelse([$3], ,echo "can't find ICU >= $1",)
+        fi
+
+        AC_SUBST(ICU_CFLAGS)
+        AC_SUBST(ICU_CXXFLAGS)
+        AC_SUBST(ICU_LIBS)
+  fi
+
+  if test $succeeded = yes; then
+     ifelse([$2], , :, [$2])
+  else
+     ifelse([$3], , AC_MSG_ERROR([Library requirements (ICU) not met.]), [$3])
+  fi
+])