From 6b836c6ba70a4b8f4c213fcf8e30effa35797354 Mon Sep 17 00:00:00 2001
From: Tsuda Kageyu <tsuda.kageyu@gmail.com>
Date: Fri, 27 Nov 2015 12:15:03 +0900
Subject: [PATCH] Add ENABLE_CCACHE build option to allow users opt in to use
 ccache.

---
 CMakeLists.txt | 15 +++++++++------
 NEWS           |  1 +
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8dcb72b4..9491d47f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,6 +17,15 @@ else()
 endif()
 option(ENABLE_STATIC_RUNTIME "Visual Studio, link with runtime statically" OFF)
 
+option(ENABLE_CCACHE "Use ccache when building libtag" OFF)
+if(ENABLE_CCACHE)
+  find_program(CCACHE_FOUND ccache)
+  if(CCACHE_FOUND)
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
+  endif()
+endif()
+
 option(VISIBILITY_HIDDEN "Build with -fvisibility=hidden" OFF)
 if(VISIBILITY_HIDDEN)
   add_definitions(-fvisibility=hidden)
@@ -146,12 +155,6 @@ configure_file("${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.cmake" "${CMAKE_CURRENT_BIN
 file(COPY doc/taglib.png DESTINATION doc)
 add_custom_target(docs doxygen)
 
-find_program(CCACHE_FOUND ccache)
-if(CCACHE_FOUND)
-  set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
-  set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
-endif()
-
 # uninstall target
 configure_file("${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in" "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake" IMMEDIATE @ONLY)
 
diff --git a/NEWS b/NEWS
index ade98dba..86680008 100644
--- a/NEWS
+++ b/NEWS
@@ -11,6 +11,7 @@
  * Fixed possible file corruptions when saving ASF files.
  * Fixed updating the comment field of Vorbis comments.
  * Added BUILD_BINDINGS build option.
+ * Added ENABLE_CCACHE build option.
  * Marked ByteVector::null and ByteVector::isNull() deprecated.
  * Marked String::null and ByteVector::isNull() deprecated.
  * Marked XiphComment::removeField() deprecated.