From fb1c564b78032b61bba182e748cdbadf94d26e15 Mon Sep 17 00:00:00 2001
From: Jelmer Vernooij <jelmer@samba.org>
Date: Sat, 21 Feb 2009 18:21:20 +0100
Subject: Add --enable-external-* flags for libraries shipped with Samba, to
 allow explicitly enabling or disabling the use of the version provided by the
 system.

---
 source4/build/m4/public.m4 | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'source4/build')

diff --git a/source4/build/m4/public.m4 b/source4/build/m4/public.m4
index 1823f1ba97..a707a113cd 100644
--- a/source4/build/m4/public.m4
+++ b/source4/build/m4/public.m4
@@ -6,6 +6,8 @@ dnl Published under the GPL
 dnl
 dnl SMB_EXT_LIB_FROM_PKGCONFIG(name,pkg-config name,[ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
 dnl
+dnl SMB_INCLUDED_LIB_PKGCONFIG(name,pkg-config name,[ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
+dnl
 dnl SMB_EXT_LIB(name,libs,cflags,cppflags,ldflags)
 dnl
 dnl SMB_ENABLE(name,default_build)
@@ -125,6 +127,26 @@ AC_DEFUN([SMB_EXT_LIB_FROM_PKGCONFIG],
 	fi
 ])
 
+dnl SMB_INCLUDED_LIB_PKGCONFIG(name,pkg-config name,[ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
+AC_DEFUN([SMB_INCLUDED_LIB_PKGCONFIG],
+[
+	AC_ARG_ENABLE([external-]translit($1,`A-Z',`a-z'),
+		AS_HELP_STRING([--enable-external-]translit($1,`A-Z',`a-z'), [Use external $1 instead of built-in (default=auto)]), [], [enableval=auto])
+
+	if test $enableval = yes -o $enableval = auto; then
+		SMB_EXT_LIB_FROM_PKGCONFIG([$1], [$2], [$3], [
+			if test $enableval = yes; then
+				AC_MSG_ERROR([Unable to find external $1])
+			fi
+		])
+	else
+		ifelse([$4], [], [
+			  SMB_EXT_LIB($1)
+			  SMB_ENABLE($1, NO)
+		], [$4])
+	fi
+])
+
 dnl SMB_INCLUDE_MK(file)
 AC_DEFUN([SMB_INCLUDE_MK],
 [
-- 
cgit