From 4cbba1ff92ef4b29dee6dbc2a37fc0b77d348393 Mon Sep 17 00:00:00 2001
From: Lars Bilke <lars.bilke@ufz.de>
Date: Wed, 19 Apr 2017 14:48:40 +0200
Subject: [PATCH] [CMake] Check for required ccache config.
---
CMakeLists.txt | 1 +
scripts/cmake/CCacheSetup.cmake | 28 ++++++++++++++++++++++++++++
scripts/cmake/Find.cmake | 10 +---------
3 files changed, 30 insertions(+), 9 deletions(-)
create mode 100644 scripts/cmake/CCacheSetup.cmake
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 50eaa95913f..5faa2f647ae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,6 +34,7 @@ include(scripts/cmake/Functions.cmake)
include(scripts/cmake/CMakeSetup.cmake)
include(scripts/cmake/CompilerSetup.cmake)
include(scripts/cmake/Find.cmake)
+include(scripts/cmake/CCacheSetup.cmake)
include(scripts/cmake/SubmoduleSetup.cmake)
include(scripts/cmake/ProjectSetup.cmake)
include(scripts/cmake/DocumentationSetup.cmake)
diff --git a/scripts/cmake/CCacheSetup.cmake b/scripts/cmake/CCacheSetup.cmake
new file mode 100644
index 00000000000..ddac17905d4
--- /dev/null
+++ b/scripts/cmake/CCacheSetup.cmake
@@ -0,0 +1,28 @@
+if(NOT CCACHE_TOOL_PATH)
+ return()
+endif()
+
+# Set ccache as the compiler launcher
+set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
+set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
+
+if(COMPILER_IS_CLANG)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Qunused-arguments")
+endif()
+
+# Check ccache pre-compiled headers config
+execute_process(COMMAND ${CCACHE_TOOL_PATH} --print-config
+ OUTPUT_VARIABLE CCACHE_CONFIG
+ ERROR_VARIABLE CCACHE_CONFIG
+)
+
+# Regex should be "sloppiness.*time_macros.*pch_defines.*" but due to bug fixed
+# in https://ccache.samba.org/releasenotes.html#_ccache_3_2_5 we have to leave
+# out pch_defines. Ubuntu 16.04 comes with ccache 3.2.4 ...
+string(REGEX MATCH "sloppiness.*time_macros.*"
+ COTIRE_CCACHE_CONFIG ${CCACHE_CONFIG}
+)
+
+if(NOT COTIRE_CCACHE_CONFIG)
+ message(FATAL_ERROR "CCache not configured! You must set sloppiness to pch_defines,time_macros. See https://docs.opengeosys.org/docs/devguide/advanced/using-ccache")
+endif()
diff --git a/scripts/cmake/Find.cmake b/scripts/cmake/Find.cmake
index d2baee31e8d..f482c13d647 100644
--- a/scripts/cmake/Find.cmake
+++ b/scripts/cmake/Find.cmake
@@ -54,15 +54,7 @@ find_program(CURL_TOOL_PATH curl DOC "The curl-tool")
find_program(S3CMD_TOOL_PATH s3cmd DOC "S3cmd tool for uploading to Amazon S3")
-## CCache
-find_program(CCACHE_FOUND ccache)
-if(CCACHE_FOUND)
- set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
- set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
- if(COMPILER_IS_CLANG)
- set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Qunused-arguments")
- endif()
-endif(CCACHE_FOUND)
+find_program(CCACHE_TOOL_PATH ccache)
# Tools for web
find_program(VTKJS_CONVERTER vtkDataConverter
--
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