From ab1bc5b5ba466acee87267f39c77a04d75709f3a Mon Sep 17 00:00:00 2001
From: rikky <rikky@ffa7fe5e-494d-0410-b361-a75ebd5db220>
Date: Sun, 23 Jan 2011 20:47:58 +0000
Subject: Fix:Build/cmake:Make user defined settings survive a cmake cache
 refresh

git-svn-id: http://svn.code.sf.net/p/navit/code/trunk/navit@3951 ffa7fe5e-494d-0410-b361-a75ebd5db220
---
 cmake/navit_macros.cmake | 35 ++++++++++++++++++++++-------------
 1 file changed, 22 insertions(+), 13 deletions(-)

(limited to 'cmake')

diff --git a/cmake/navit_macros.cmake b/cmake/navit_macros.cmake
index 5c40eaaa..08647e2a 100644
--- a/cmake/navit_macros.cmake
+++ b/cmake/navit_macros.cmake
@@ -1,14 +1,26 @@
+macro(internal_set VARIABLE REASON)
+   if (NOT DEFINED ${VARIABLE})
+      set(${VARIABLE} ${ARGN})
+      set(${VARIABLE}_REASON ${REASON} CACHE STRING "reason")
+   else()
+      set(${VARIABLE}_REASON "User defined" CACHE STRING "reason")
+   endif()
+endmacro()
+
 macro(set_with_reason VARIABLE REASON ENABLE)
-   set(${VARIABLE} ${ENABLE})
-   set(${VARIABLE}_REASON ${REASON})
-   string(REPLACE "/" "_" VARIABLE_NAMES ${VARIABLE})
-   set(${VARIABLE_NAMES}_LIBS ${ARGN})
+   if (DEFINED ${VARIABLE}_REASON AND NOT ${VARIABLE}_REASON STREQUAL "User defined")
+      set(${VARIABLE} ${ENABLE})
+      set(${VARIABLE}_REASON ${REASON})
+      string(REPLACE "/" "_" VARIABLE_NAMES ${VARIABLE})
+      set(${VARIABLE_NAMES}_LIBS ${ARGN})
+   else()
+      message("Do not change user defined settings for ${VARIABLE}")
+   endif()
 endmacro()
 
 macro(add_feature FEATURE REASON ENABLE)
    list(APPEND ALL_FEATURES ${FEATURE})
-   set(${FEATURE} ${ENABLE})
-   set(${FEATURE}_REASON ${REASON})
+   internal_set(${FEATURE} ${REASON} ${ENABLE})
 endmacro()
 
 macro(cfg_feature FEATURE REASON ENABLE)
@@ -16,18 +28,15 @@ macro(cfg_feature FEATURE REASON ENABLE)
    set(${FEATURE}_REASON ${REASON})
 endmacro()
 
-# modules may be linked static, or shared for import at runtime
-macro(add_module MODULE_PATH REASON)
+macro(add_module MODULE_PATH REASON ENABLE)
    list(APPEND ALL_MODULES ${MODULE_PATH})
-   set(${MODULE_PATH} ${ARGN})
-   set(${MODULE_PATH}_REASON ${REASON})
+   internal_set(${MODULE_PATH} ${REASON} ${ENABLE})
 endmacro()
 
 # plugins are always linked static
-macro(add_plugin PLUGIN_PATH REASON)
+macro(add_plugin PLUGIN_PATH REASON ENABLE)
    list(APPEND ALL_PLUGINS ${PLUGIN_PATH})
-   set(${PLUGIN_PATH} ${ARGN})
-   set(${PLUGIN_PATH}_REASON ${REASON})
+   internal_set(${PLUGIN_PATH} ${REASON} ${ENABLE})
 endmacro()
 
 macro(module_add_library MODULE_NAME )
-- 
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