configure.ac |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

New commits:
commit 9ffa51c3cb27cf3ec58c24c8e5b41cd2bf09fd5b
Author: Norbert Thiebaud <[email protected]>
Date:   Thu Mar 17 12:20:27 2016 -0500

    clang and ccache do not play nice if CCACHE_CCP2=YES is not set
    
    that cause surious warning that are turned into error with -Werror
    indicate that this will cause errors (not only warning)
    and disable ccache if it was an implicit enable-ccache.
    error out if it was an explicit --enable-ccache
    
    Change-Id: I351af8b8d73175cd2ce9e52ee3c376ba6a387af1
    Reviewed-on: https://gerrit.libreoffice.org/23338
    Tested-by: Jenkins <[email protected]>
    Reviewed-by: Norbert Thiebaud <[email protected]>

diff --git a/configure.ac b/configure.ac
index 23b6fb0..c2bb656 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3793,8 +3793,13 @@ AC_SUBST(COM_IS_CLANG)
 
 if test "$CCACHE" != "" -a "$COM_IS_CLANG" = TRUE; then
     if test -z "$CCACHE_CPP2"; then
-        AC_MSG_WARN([Using ccache with Clang without CCACHE_CPP2 set causes 
spurious warnings.])
-        add_warning "Using ccache with Clang without CCACHE_CPP2 set causes 
spurious warnings."
+        if test "$enable_ccache" = "" ; then
+            AC_MSG_WARN([Using ccache with Clang without CCACHE_CPP2 set 
causes spurious warnings/errors.])
+            add_warning "Using ccache with Clang without CCACHE_CPP2 set 
causes spurious warnings/errors. Disabling it."
+            CCACHE=
+        else
+            AC_MSG_ERROR([Using --enable-ccache with Clang without CCACHE_CPP2 
set causes spurious warnings/errors.])
+        fi
     fi
 fi
 
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