thodg/libgit2/deps/winhttp/CMakeLists.txt

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• Hash : c5cd71b2
  Author :
  Date : 2021-12-23T18:23:34
  

  cmake: use PROJECT_SOURCE_DIR of CMAKE_SOURCE_DIR
  
  Also applies to *_BINARY_DIR.
  
  This effectively reverts 84083dcc8bd41332ccac9d7b537f3e254d79011c,
  which broke all users of libgit2 that use it as a CMake subdirectory
  (via `add_subdirectory()`). This is because CMAKE_SOURCE_DIR refers
  to the root-most CMake directory, which in the case of
  `add_subdirectory()` is a parent project to libgit2 and thus the paths
  don't make any sense to the configuration files. Corollary,
  CMAKE_SOURCE_DIR only makes sense if the CMake project is always the
  root project - which can rarely be guaranteed.
  
  In all honesty, CMake should deprecate and eventually remove
  CMAKE_SOURCE_DIR and CMAKE_BINARY_DIR. It's been the source of headaches
  and confusion for years, they're rarely useful over
  CMAKE_CURRENT_(SOURCE|BINARY)_DIR or PROJECT_(SOURCE|BINARY)_DIR,
  and they cause a lot of confusing configuration and source
  code layouts to boot.
  
  Any time they are used, they break `add_subdirectory()` almost 100% of
  the time, cause confusing error messages, and hide subtle bugs.
  

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• deps/winhttp/CMakeLists.txt

• find_program(DLLTOOL dlltool CMAKE_FIND_ROOT_PATH_BOTH)
  if(NOT DLLTOOL)
  	message(FATAL_ERROR "Could not find dlltool command")
  endif()
  
  set(LIBWINHTTP_PATH "${PROJECT_BINARY_DIR}/deps/winhttp")
  set(LIBWINHTTP_PATH ${LIBWINHTTP_PATH} PARENT_SCOPE)
  file(MAKE_DIRECTORY ${LIBWINHTTP_PATH})
  
  if(CMAKE_SIZEOF_VOID_P EQUAL 8)
  	set(WINHTTP_DEF "winhttp64.def")
  else()
  	set(WINHTTP_DEF "winhttp.def")
  endif()
  
  add_custom_command(
  	OUTPUT ${LIBWINHTTP_PATH}/libwinhttp.a
  	COMMAND ${DLLTOOL} -d ${WINHTTP_DEF} -k -D winhttp.dll -l libwinhttp.a
  	DEPENDS ${WINHTTP_DEF}
  	WORKING_DIRECTORY ${LIBWINHTTP_PATH})
  
  set_source_files_properties(
  	${CMAKE_CURRENT_SOURCE_DIR}/src/transports/winhttp.c
  	PROPERTIES OBJECT_DEPENDS ${LIBWINHTTP_PATH}/libwinhttp.a)
  

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