[clutter] build: Use AC_CACHE_SAVE

[Emmanuele Bassi <ebassi src gnome org>]

commit dc672b5c89c2b4300b16f117aff26a1fe1f7bbfa
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Wed Nov 2 17:30:30 2011 +0000

    build: Use AC_CACHE_SAVE
    
    Delimit the points in the configure script that should save the state,
    so that running the script multiple times doesn't require starting from
    scratch even if it didn't terminate successfully.

 configure.ac |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index be0849d..8777ad6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -83,6 +83,8 @@ AC_SUBST([CLUTTER_LT_VERSION],  [$CLUTTER_LT_VERSION])
 
 AC_PROG_SED
 
+dnl = Preliminary platform checks =============================================
+
 AC_CANONICAL_HOST
 
 platform_win32=no
@@ -112,7 +114,9 @@ AM_CONDITIONAL(OS_GLX, [test "$platform_glx" = "yes"])
 
 AC_SUBST(CLUTTER_LT_LDFLAGS)
 
-dnl ========================================================================
+AC_CACHE_SAVE
+
+dnl = Dependencies =========================================================
 
 # Checks for programs.
 AM_PROG_CC_C_O
@@ -181,6 +185,8 @@ AC_ARG_ENABLE([Bsymbolic],
 AS_IF([test "x$enable_Bsymbolic" = "xyes"], [CLUTTER_LINK_FLAGS=-Wl[,]-Bsymbolic-functions])
 AC_SUBST(CLUTTER_LINK_FLAGS)
 
+AC_CACHE_SAVE
+
 dnl ========================================================================
 
 FLAVOUR_LIBS=""
@@ -453,6 +459,8 @@ dnl strip leading spaces
 CLUTTER_BACKENDS=${CLUTTER_BACKENDS#* }
 AC_SUBST(CLUTTER_BACKENDS)
 
+AC_CACHE_SAVE
+
 dnl === Clutter configuration =================================================
 
 CLUTTER_CONFIG_DEFINES=