cmake: move cflag defaults into a separate module

1 files changed, 18 insertions, 171 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 040881f83..f7f19468c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,23 +8,6 @@ project(libgit2 VERSION "1.3.0" LANGUAGES C)
 # Add find modules to the path
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${libgit2_SOURCE_DIR}/cmake")
 
-# Modules
-
-include(CheckLibraryExists)
-include(CheckFunctionExists)
-include(CheckSymbolExists)
-include(CheckStructHasMember)
-include(CheckPrototypeDefinition)
-include(AddCFlagIfSupported)
-include(FindPkgLibraries)
-include(FindThreads)
-include(FindStatNsec)
-include(Findfutimens)
-include(GNUInstallDirs)
-include(IdeSplitSources)
-include(FeatureSummary)
-include(EnableWarnings)
-
 #
 # Build options
 #
@@ -98,6 +81,24 @@ if(WIN32)
 endif()
 
 
+# Modules
+
+include(CheckLibraryExists)
+include(CheckFunctionExists)
+include(CheckSymbolExists)
+include(CheckStructHasMember)
+include(CheckPrototypeDefinition)
+include(AddCFlagIfSupported)
+include(FindPkgLibraries)
+include(FindThreads)
+include(FindStatNsec)
+include(Findfutimens)
+include(GNUInstallDirs)
+include(IdeSplitSources)
+include(FeatureSummary)
+include(EnableWarnings)
+include(DefaultCFlags)
+
 #
 # Compiler / linker flags
 #
@@ -106,160 +107,6 @@ if(DEPRECATE_HARD)
 	add_definitions(-DGIT_DEPRECATE_HARD)
 endif()
 
-# Platform specific compilation flags
-if(MSVC)
-	add_definitions(-D_SCL_SECURE_NO_WARNINGS)
-	add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
-	add_definitions(-D_CRT_NONSTDC_NO_DEPRECATE)
-
-	string(REPLACE "/Zm1000" " " CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
-
-	# /GF - String pooling
-	# /MP - Parallel build
-	set(CMAKE_C_FLAGS "/GF /MP /nologo ${CMAKE_C_FLAGS}")
-
-	# /Gd - explicitly set cdecl calling convention
-	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /Gd")
-
-	if(NOT (MSVC_VERSION LESS 1900))
-		# /guard:cf - Enable Control Flow Guard
-		set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /guard:cf")
-	endif()
-
-	if(STATIC_CRT)
-		set(CRT_FLAG_DEBUG "/MTd")
-		set(CRT_FLAG_RELEASE "/MT")
-	else()
-		set(CRT_FLAG_DEBUG "/MDd")
-		set(CRT_FLAG_RELEASE "/MD")
-	endif()
-
-	if(WIN32_LEAKCHECK)
-		set(GIT_WIN32_LEAKCHECK 1)
-		set(CRT_FLAG_DEBUG "${CRT_FLAG_DEBUG}")
-		set(CMAKE_C_STANDARD_LIBRARIES "${CMAKE_C_STANDARD_LIBRARIES} Dbghelp.lib")
-	endif()
-
-	# /Zi - Create debugging information
-	# /Od - Disable optimization
-	# /D_DEBUG - #define _DEBUG
-	# /MTd - Statically link the multithreaded debug version of the CRT
-	# /MDd - Dynamically link the multithreaded debug version of the CRT
-	# /RTC1 - Run time checks
-	set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} /Zi /Od /D_DEBUG /RTC1 ${CRT_FLAG_DEBUG}")
-
-	# /DNDEBUG - Disables asserts
-	# /MT - Statically link the multithreaded release version of the CRT
-	# /MD - Dynamically link the multithreaded release version of the CRT
-	# /O2 - Optimize for speed
-	# /Oy - Enable frame pointer omission (FPO) (otherwise CMake will automatically turn it off)
-	# /GL - Link time code generation (whole program optimization)
-	# /Gy - Function-level linking
-	set(CMAKE_C_FLAGS_RELEASE "/DNDEBUG /O2 /Oy /GL /Gy ${CRT_FLAG_RELEASE}")
-
-	# /Oy- - Disable frame pointer omission (FPO)
-	set(CMAKE_C_FLAGS_RELWITHDEBINFO "/DNDEBUG /Zi /O2 /Oy- /GL /Gy ${CRT_FLAG_RELEASE}")
-
-	# /O1 - Optimize for size
-	set(CMAKE_C_FLAGS_MINSIZEREL "/DNDEBUG /O1 /Oy /GL /Gy ${CRT_FLAG_RELEASE}")
-
-	# /IGNORE:4221 - Ignore empty compilation units
-	set(CMAKE_STATIC_LINKER_FLAGS "/IGNORE:4221")
-
-	# /DYNAMICBASE - Address space load randomization (ASLR)
-	# /NXCOMPAT - Data execution prevention (DEP)
-	# /LARGEADDRESSAWARE - >2GB user address space on x86
-	# /VERSION - Embed version information in PE header
-	set(CMAKE_EXE_LINKER_FLAGS "/DYNAMICBASE /NXCOMPAT /LARGEADDRESSAWARE /VERSION:${libgit2_VERSION_MAJOR}.${libgit2_VERSION_MINOR}")
-
-	if(NOT (MSVC_VERSION LESS 1900))
-		# /GUARD:CF - Enable Control Flow Guard
-		set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /GUARD:CF")
-	endif()
-
-	# /DEBUG - Create a PDB
-	# /LTCG - Link time code generation (whole program optimization)
-	# /OPT:REF /OPT:ICF - Fold out duplicate code at link step
-	# /INCREMENTAL:NO - Required to use /LTCG
-	# /DEBUGTYPE:cv,fixup - Additional data embedded in the PDB (requires /INCREMENTAL:NO, so not on for Debug)
-	set(CMAKE_EXE_LINKER_FLAGS_DEBUG "/DEBUG")
-	set(CMAKE_EXE_LINKER_FLAGS_RELEASE "/RELEASE /LTCG /OPT:REF /OPT:ICF /INCREMENTAL:NO")
-	set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "/DEBUG /RELEASE /LTCG /OPT:REF /OPT:ICF /INCREMENTAL:NO /DEBUGTYPE:cv,fixup")
-	set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "/RELEASE /LTCG /OPT:REF /OPT:ICF /INCREMENTAL:NO")
-
-	# Same linker settings for DLL as EXE
-	set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
-	set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG}")
-	set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE}")
-	set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
-	set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL}")
-else()
-	if(ENABLE_REPRODUCIBLE_BUILDS)
-		set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> Dqc <TARGET> <LINK_FLAGS> <OBJECTS>")
-		set(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> Dq  <TARGET> <LINK_FLAGS> <OBJECTS>")
-		set(CMAKE_C_ARCHIVE_FINISH "<CMAKE_RANLIB> -D <TARGET>")
-	endif()
-
-	if(NOT BUILD_SHARED_LIBS)
-		set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
-	endif()
-
-	set(CMAKE_C_FLAGS "-D_GNU_SOURCE ${CMAKE_C_FLAGS}")
-
-	enable_warnings(all)
-	enable_warnings(extra)
-
-	if(CMAKE_SYSTEM_NAME MATCHES "(Solaris|SunOS)")
-		set(CMAKE_C_FLAGS "-D_POSIX_C_SOURCE=200112L -D__EXTENSIONS__ -D_POSIX_PTHREAD_SEMANTICS ${CMAKE_C_FLAGS}")
-	endif()
-
-	set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -D_DEBUG -O0")
-
-	if(MINGW OR MSYS) # MinGW and MSYS always do PIC and complain if we tell them to
-		string(REGEX REPLACE "-fPIC" "" CMAKE_SHARED_LIBRARY_C_FLAGS "${CMAKE_SHARED_LIBRARY_C_FLAGS}")
-	elseif(BUILD_SHARED_LIBS)
-		add_c_flag_IF_SUPPORTED(-fvisibility=hidden)
-
-		set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
-	endif()
-
-	if(MINGW)
-		# MinGW >= 3.14 uses the C99-style stdio functions
-		# automatically, but forks like mingw-w64 still want
-		# us to define this in order to use them
-		add_definitions(-D__USE_MINGW_ANSI_STDIO=1)
-	endif()
-
-	enable_warnings(documentation)
-	disable_warnings(documentation-deprecated-sync)
-	disable_warnings(missing-field-initializers)
-	enable_warnings(strict-aliasing)
-	enable_warnings(strict-prototypes)
-	enable_warnings(declaration-after-statement)
-	enable_warnings(shift-count-overflow)
-	enable_warnings(unused-const-variable)
-	enable_warnings(unused-function)
-	enable_warnings(int-conversion)
-	enable_warnings(c11-extensions)
-	enable_warnings(c99-c11-compat)
-
-	# MinGW uses gcc, which expects POSIX formatting for printf, but
-	# uses the Windows C library, which uses its own format specifiers.
-	# Disable format specifier warnings.
-	if(MINGW)
-		disable_warnings(format)
-		disable_warnings(format-security)
-	else()
-		enable_warnings(format)
-		enable_warnings(format-security)
-	endif()
-endif()
-
-# Ensure that MinGW provides the correct header files.
-if(WIN32 AND NOT CYGWIN)
-	add_definitions(-DWIN32 -D_WIN32_WINNT=0x0600)
-endif()
-
 if(NOT CMAKE_CONFIGURATION_TYPES)
 	# Build Debug by default
 	if(NOT CMAKE_BUILD_TYPE)