From 00e96f59f7af7fd7a47421ea0f118036182f8ea6 Mon Sep 17 00:00:00 2001
From: Ghislain MARY <ghislain.mary@belledonne-communications.com>
Date: Thu, 15 Oct 2015 15:27:49 +0200
Subject: [PATCH] Regenerate liblinphone_gitversion.h with CMake when the git
 revision has changed.

---
 coreapi/CMakeLists.txt   | 15 +++++++--------
 coreapi/gitversion.cmake | 11 +++--------
 coreapi/gitversion.h.in  | 21 +++++++++++++++++++++
 3 files changed, 31 insertions(+), 16 deletions(-)
 create mode 100644 coreapi/gitversion.h.in

diff --git a/coreapi/CMakeLists.txt b/coreapi/CMakeLists.txt
index 79cb1dcb5..10e39316e 100644
--- a/coreapi/CMakeLists.txt
+++ b/coreapi/CMakeLists.txt
@@ -120,13 +120,11 @@ else()
 	list(APPEND SOURCE_FILES linphone_tunnel_stubs.c)
 endif()
 
-set(GENERATED_SOURCE_FILES
-	${CMAKE_CURRENT_BINARY_DIR}/liblinphone_gitversion.h
-)
-set_source_files_properties(${GENERATED_SOURCE_FILES} PROPERTIES GENERATED TRUE)
 find_package(Git)
-add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/liblinphone_gitversion.h
-	COMMAND ${CMAKE_COMMAND} -DGIT_EXECUTABLE=${GIT_EXECUTABLE} -DWORK_DIR=${CMAKE_CURRENT_SOURCE_DIR} -DOUTPUT_DIR=${CMAKE_CURRENT_BINARY_DIR} -P ${CMAKE_CURRENT_SOURCE_DIR}/gitversion.cmake)
+add_custom_target(liblinphone-git-version
+	COMMAND ${CMAKE_COMMAND} -DGIT_EXECUTABLE=${GIT_EXECUTABLE} -DWORK_DIR=${CMAKE_CURRENT_SOURCE_DIR} -DOUTPUT_DIR=${CMAKE_CURRENT_BINARY_DIR} -P ${CMAKE_CURRENT_SOURCE_DIR}/gitversion.cmake
+	BYPRODUCTS "${CMAKE_CURRENT_BINARY_DIR}/liblinphone_gitversion.h"
+)
 
 add_definitions(
 	-DUSE_BELLESIP
@@ -161,10 +159,10 @@ if(INTL_FOUND)
 endif()
 
 if(ENABLE_STATIC)
-	add_library(linphone STATIC ${SOURCE_FILES} ${GENERATED_SOURCE_FILES})
+	add_library(linphone STATIC ${SOURCE_FILES})
 	target_link_libraries(linphone ${LIBS})
 else()
-	add_library(linphone SHARED ${SOURCE_FILES} ${GENERATED_SOURCE_FILES})
+	add_library(linphone SHARED ${SOURCE_FILES})
 	set_target_properties(linphone PROPERTIES VERSION ${LINPHONE_SO_VERSION} LINKER_LANGUAGE CXX)
 	target_link_libraries(linphone ${LIBS})
 	if(MSVC)
@@ -176,6 +174,7 @@ else()
 		endif()
 	endif()
 endif()
+add_dependencies(linphone liblinphone-git-version)
 if(WIN32 AND CMAKE_SYSTEM_NAME STREQUAL "WindowsPhone")
 	set_target_properties(linphone PROPERTIES PREFIX "lib")
 endif()
diff --git a/coreapi/gitversion.cmake b/coreapi/gitversion.cmake
index 23fecb10c..eb0f99e3c 100644
--- a/coreapi/gitversion.cmake
+++ b/coreapi/gitversion.cmake
@@ -27,13 +27,8 @@ if(GIT_EXECUTABLE)
 		OUTPUT_VARIABLE GIT_REVISION
 		OUTPUT_STRIP_TRAILING_WHITESPACE
 	)
-	execute_process(
-		COMMAND ${CMAKE_COMMAND} -E echo "#define LIBLINPHONE_GIT_VERSION \"${GIT_REVISION}\""
-		OUTPUT_FILE ${OUTPUT_DIR}/liblinphone_gitversion.h
-	)
 else()
-	execute_process(
-		COMMAND ${CMAKE_COMMAND} -E echo "#define LIBLINPHONE_GIT_VERSION \"unknown\""
-		OUTPUT_FILE ${OUTPUT_DIR}/liblinphone_gitversion.h
-	)
+	set(GIT_REVISION "unknown")
 endif()
+
+configure_file("${WORK_DIR}/gitversion.h.in" "${OUTPUT_DIR}/liblinphone_gitversion.h" @ONLY)
diff --git a/coreapi/gitversion.h.in b/coreapi/gitversion.h.in
new file mode 100644
index 000000000..493b4bcb1
--- /dev/null
+++ b/coreapi/gitversion.h.in
@@ -0,0 +1,21 @@
+/*
+linphone
+Copyright (C) 2010-2014  Belledonne Communications SARL
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+
+#define LIBLINPHONE_GIT_VERSION "@GIT_REVISION@"
\ No newline at end of file