From 0d7738dce5f2dac9fd4732f1b79456f2c5871018 Mon Sep 17 00:00:00 2001
From: Julius Michaelis <gitter@liftm.de>
Date: Thu, 4 Oct 2018 08:33:31 +0200
Subject: [PATCH] Drop broken GCC precompiled header support

---
 CMakeLists.txt            | 15 --------
 cmake/GccPchSupport.cmake | 72 ---------------------------------------
 2 files changed, 87 deletions(-)
 delete mode 100644 cmake/GccPchSupport.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 66107204f..b52f29a12 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1439,21 +1439,6 @@ if(CMAKE_GENERATOR MATCHES "^Visual Studio 14 2015")
 	)
 endif()
 
-############################################################################
-# Precompiled header support, gcc part (it needs the cxx flags)
-############################################################################
-
-if(CMAKE_COMPILER_IS_GNUCXX)
-	include(GccPchSupport)
-	option(USE_GCC_PCH "Use GCC precompiled headers" OFF)
-endif()
-if(USE_GCC_PCH)
-	add_precompiled_header(libmisc src/C4Include.h)
-	add_precompiled_header(libc4script src/C4Include.h)
-	add_precompiled_header(openclonk src/C4Include.h)
-	add_precompiled_header(openclonk-server src/C4Include.h)
-endif()
-
 ############################################################################
 # installation
 ############################################################################
diff --git a/cmake/GccPchSupport.cmake b/cmake/GccPchSupport.cmake
deleted file mode 100644
index 5311bddf1..000000000
--- a/cmake/GccPchSupport.cmake
+++ /dev/null
@@ -1,72 +0,0 @@
-#Copied from http://www.mail-archive.com/cmake@cmake.org/msg04394.html which copied it from the rosengarden project
-#see also: http://gcc.gnu.org/onlinedocs/gcc-4.0.4/gcc/Precompiled-Headers.html
-
-MACRO(ADD_PRECOMPILED_HEADER _targetName _input)
-
-	# Prepare environment
-	GET_FILENAME_COMPONENT(_name ${_input} NAME)
-	SET(_pchdir "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/${_targetName}_pch.dir")
-	MAKE_DIRECTORY(${_pchdir})
-	SET(_source "${CMAKE_CURRENT_SOURCE_DIR}/${_input}")
-	SET(_includeput "${_pchdir}/${_name}")
-	SET(_output "${_includeput}.gch")
-
-	# Assemble the compiler command with which future stuff will be built
-	STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name) # Don't worry: CMake won't use any of the R/D/RWDI/MSR vars if the build type is not defined
-	if(CMAKE_CXX_COMPILER_ARG1) # please, know what you're doing if you rely on this...
-		STRING(STRIP ${CMAKE_CXX_COMPILER_ARG1} _ccache_tweak)
-		SET(_ccache_tweak "\"${_ccache_tweak}\"")
-	endif()
-	SET(_compiler_FLAGS ${_ccache_tweak} ${CMAKE_CXX_FLAGS} ${${_flags_var_name}})
-	if(CMAKE_BUILD_TYPE)
-        if(${CMAKE_BUILD_TYPE} STREQUAL "Debug")
-            LIST(APPEND _compiler_FLAGS "-D_DEBUG")
-        endif()
-	endif()
-	GET_TARGET_PROPERTY(_compile_defines ${_targetName} COMPILE_DEFINITIONS)
-	if(_compile_defines)
-		FOREACH(item ${_compile_defines})
-			STRING(REPLACE "\"" "\\\"" item ${item})
-			LIST(APPEND _compiler_FLAGS "-D${item}")
-		ENDFOREACH(item)
-	endif()
-	GET_TARGET_PROPERTY(_compile_defines ${_targetName} COMPILE_DEFINITIONS_${CMAKE_BUILD_TYPE})
-	if(_compile_defines)
-		FOREACH(item ${_compile_defines})
-			STRING(REPLACE "\"" "\\\"" item ${item})
-			LIST(APPEND _compiler_FLAGS "$<$<NOT:$<STREQUAL:,${item}>>:-D${item}>")
-		ENDFOREACH(item)
-	endif()
-	GET_DIRECTORY_PROPERTY(_compile_defines COMPILE_DEFINITIONS)
-	if(_compile_defines)
-		FOREACH(item ${_compile_defines})
-			STRING(REPLACE "\"" "\\\"" item ${item})
-			LIST(APPEND _compiler_FLAGS "$<$<NOT:$<STREQUAL:,${item}>>:-D${item}>")
-		ENDFOREACH(item)
-	endif()
-	GET_DIRECTORY_PROPERTY(_compile_defines COMPILE_DEFINITIONS_${CMAKE_BUILD_TYPE})
-	if(_compile_defines)
-		FOREACH(item ${_compile_defines})
-			STRING(REPLACE "\"" "\\\"" item ${item})
-			LIST(APPEND _compiler_FLAGS "$<$<NOT:$<STREQUAL:,${item}>>:-D${item}>")
-		ENDFOREACH(item)
-	endif()
-	GET_DIRECTORY_PROPERTY(_directory_flags INCLUDE_DIRECTORIES)
-	FOREACH(item ${_directory_flags})
-		LIST(APPEND _compiler_FLAGS "-I\"${item}\"")
-	ENDFOREACH(item)
-	SEPARATE_ARGUMENTS(_compiler_FLAGS)
-	list(REMOVE_DUPLICATES _compiler_FLAGS)
-	# Add a target with the pch
-	ADD_CUSTOM_COMMAND(
-		OUTPUT ${_output}
-		COMMAND "${CMAKE_CXX_COMPILER}"
-			${_compiler_FLAGS} -x c++-header -o ${_output} ${_source}
-		IMPLICIT_DEPENDS CXX ${_source}
-	)
-	FILE(WRITE "${_pchdir}/${_name}" "#ifdef __cplusplus\n#warning Precompiled header not used. Turn off or fix!\n#endif") # This file is added so the cc-units don't stumble over not being able to include the file
-	ADD_CUSTOM_TARGET(${_targetName}_pch DEPENDS ${_output})
-	ADD_DEPENDENCIES(${_targetName} ${_targetName}_pch)
-	SET_TARGET_PROPERTIES(${_targetName} PROPERTIES	COMPILE_FLAGS "-include ${_includeput}")
-
-ENDMACRO(ADD_PRECOMPILED_HEADER)