From f69a43285ec023f34a9913bfa55a317349a294df Mon Sep 17 00:00:00 2001
From: das <das>
Date: Sun, 21 Dec 2008 20:55:07 +0000
Subject: 	* unix/configure.in:	Preserve configure environment
 variables for 				sub-configures of bundled packages;
 reuse 				configure cache file for sub-configures.

---
 unix/configure.in | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/unix/configure.in b/unix/configure.in
index 6c694f6..607ac02 100644
--- a/unix/configure.in
+++ b/unix/configure.in
@@ -3,7 +3,7 @@ dnl	This file is an input file used by the GNU "autoconf" program to
 dnl	generate the file "configure", which is run during Tcl installation
 dnl	to configure the system for the local environment.
 #
-# RCS: @(#) $Id: configure.in,v 1.201 2008/12/20 01:11:10 das Exp $
+# RCS: @(#) $Id: configure.in,v 1.202 2008/12/21 20:55:07 das Exp $
 
 AC_INIT([tcl],[8.6])
 AC_PREREQ(2.59)
@@ -30,7 +30,24 @@ TCL_MINOR_VERSION=6
 TCL_PATCH_LEVEL="b1"
 VERSION=${TCL_VERSION}
 
-PKG_CFG_ARGS=$@
+#------------------------------------------------------------------------
+# Setup configure arguments for bundled packages
+#------------------------------------------------------------------------
+
+PKG_CFG_ARGS="$@ ${PKG_CFG_ARGS}"
+
+# Ensure environment of sub-configure is the same as ours
+for v in CC CPP CFLAGS CPPFLAGS LDFLAGS; do
+    eval 'test -n "$'$v'" && PKG_CFG_ARGS="$v=\"$'$v'\" $PKG_CFG_ARGS"'
+done
+
+if test -r "$cache_file" -a -f "$cache_file"; then
+    case $cache_file in
+	[[\\/]]* | ?:[[\\/]]* ) pkg_cache_file=$cache_file ;;
+	*) pkg_cache_file=../../$cache_file ;;
+    esac
+    PKG_CFG_ARGS="${PKG_CFG_ARGS} --cache-file=$pkg_cache_file"
+fi
 
 #------------------------------------------------------------------------
 # Handle the --prefix=... option
@@ -126,7 +143,6 @@ AC_CHECK_HEADER([zlib.h],[
 AS_IF([test $zlib_ok = yes], [
   AC_SEARCH_LIBS([deflateSetHeader],[z],[],[
     zlib_ok=no
-    AC_MSG_WARN([todo: Add compat/zlib to list of things to build])
   ])])
 AS_IF([test $zlib_ok = no], [
   AC_SUBST(ZLIB_DIR,[\${COMPAT_DIR}/zlib])
-- 
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