From f8f343fd3ae5bff315224b30d8a8ac9293da6b14 Mon Sep 17 00:00:00 2001
From: Jon Siwek <jsiwek@corelight.com>
Date: Wed, 29 Nov 2017 14:01:37 -0600
Subject: [PATCH] Add --ccache option to configure script (requires CMake
 3.10+).

This just provides a convient way of indicating that ccache should
be used as compiler-wrapper during builds. e.g. when I want dev/debug
builds that (re)compile quickly, I do:

./configure --build-type=debug --generator=Ninja --ccache
---
 CHANGES        |  4 ++++
 CMakeLists.txt | 12 ++++++++++++
 VERSION        |  2 +-
 configure      |  5 +++++
 4 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/CHANGES b/CHANGES
index c664bca820..f8c54b1b19 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,4 +1,8 @@
 
+2.5-359 | 2017-11-29 14:01:37 -0600
+
+  * Add --ccache option to configure script (requires CMake 3.10+). (Corelight)
+
 2.5-358 | 2017-11-28 12:28:14 -0800
 
   * Extend the TLS analyzer with several events containing cryptographic
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 31e2346dfe..2abd715732 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,6 +9,18 @@ include(cmake/CommonCMakeConfig.cmake)
 ########################################################################
 ## Project/Build Configuration
 
+if ( ENABLE_CCACHE )
+    find_program(CCACHE_PROGRAM ccache)
+
+    if ( NOT CCACHE_PROGRAM )
+        message(FATAL_ERROR "ccache not found")
+    endif ()
+
+    message(STATUS "Using ccache: ${CCACHE_PROGRAM}")
+    set(CMAKE_C_COMPILER_LAUNCHER   ${CCACHE_PROGRAM})
+    set(CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE_PROGRAM})
+endif ()
+
 set(BRO_ROOT_DIR ${CMAKE_INSTALL_PREFIX})
 if (NOT BRO_SCRIPT_INSTALL_PATH)
     # set the default Bro script installation path (user did not specify one)
diff --git a/VERSION b/VERSION
index d05adf51f7..253e551217 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.5-358
+2.5-359
diff --git a/configure b/configure
index 757dfc595b..23b12bfb03 100755
--- a/configure
+++ b/configure
@@ -25,6 +25,8 @@ Usage: $0 [OPTION]... [VAR=VALUE]...
                              - RelWithDebInfo: optimizations on,
                                    debug symbols on, debug flags off
     --generator=GENERATOR  CMake generator to use (see cmake --help)
+    --ccache               use ccache to speed up recompilation (requires
+                           ccache installation and CMake 3.10+)
 
   Installation Directories:
     --prefix=PREFIX        installation directory [/usr/local/bro]
@@ -169,6 +171,9 @@ while [ $# -ne 0 ]; do
         --generator=*)
             CMakeGenerator="$optarg"
             ;;
+        --ccache)
+            append_cache_entry ENABLE_CCACHE         BOOL   true
+            ;;
         --prefix=*)
             prefix=$optarg
             append_cache_entry CMAKE_INSTALL_PREFIX PATH   $optarg