# main rc file for setting up emscripten toolchain paths


return


# ================================================================================
# *** THIS FILE HAS BEEN DECOMISSIONED ***
#       USE: emsdk's emsdk_set_env.sh
#
#
# the following are notes for reference
# ================================================================================


# ----- WINDOWS NOTES -----
#
# TL;DR;
#
# WARNING: DO NOT USE CYGWIN - but, you can use Git-Bash (mingw64)
#     - https://stackoverflow.com/questions/25019057/how-are-msys-msys2-and-msysgit-related-to-each-other
#     - https://sourceforge.net/p/msys2/wiki/How%20does%20MSYS2%20differ%20from%20Cygwin/
#
# essentially, "builds" on cygwin targets POSIX-compatible environments
#        while "builds" on MSYS2 targets native windows executables
#
#
# Long Form:
#
# "unix path" vs "drive:"
#     "windows python" version does not play nice within Cygwin environment
#
#     meaning, even if you tried using "cygwin python" from the cygwin environment
#     the build tools from this setup will not work from the windows command line
#
#
# WARNING: emscripten does not work if running "configure" in Windows (no "shell
#          program" available) -- also, even with Mingw64, "configure" errors on
#          compile tests (still thinks it's a unix environment)
#          (e.g. ICU uses ./configure to build the Makefiles)
#
#
# WARNING: shell scripts on some projects will still be broken if path contains spaces
#           (e.g. harfbuzz) -- will try to fix them in the near future


# basically, build all libs on OSX or Linux
# but, UE4 HTML5 projects can still be built on windows afterwards




	HOST=$(uname)
	if [ $HOST == 'Darwin' ]; then
		HOST='Mac'
	fi

	if [ $HOST == 'Mac' ] || [ $HOST == 'Linux' ]; then
		# emscripten uses "python2" explicitly
		# symlink link to python2.x bin
		if [ -e "/usr/bin/python" ]; then
			if [ ! -e "/usr/bin/python2" ]; then
				cp "/usr/bin/python" "/usr/bin/python2"
			fi
		elif [ -e "/usr/local/bin/python" ]; then
			if [ ! -e "/usr/local/bin/python2" ]; then
				cp "/usr/local/bin/python" "/usr/local/bin/python2"
			fi
		else
			echo ERROR: python not found
			exit
		fi

	else
		HOST=Win64
		PYTHON_ROOT="$EMSDK/$HOST/python/2.7.5.3_64bit"
		if [ ! -e "$PYTHON_ROOT/python2.exe" ]; then
			cp "$PYTHON_ROOT/python.exe" "$PYTHON_ROOT/python2.exe"
		fi

		CMAKEPATH='/c/Program Files (x86)/CMake/bin'
		if [ ! -d "$CMAKEPATH" ]; then
			echo ERROR: cmake not found
			exit
		fi
	fi




# upgrading emsdk - REMEMBER TO DO THE FOLLOWING:
#
# - edit Engine/Source/Programs/UnrealBuildTool/HTML5/HTML5SDKInfo.cs
#   + update version (paths)
#   + NOTE: requires UBT rebuild !!!
#
# - edit Engine/Extras/ThirdPartyNotUE/emsdk/emscripten/<version>/tools/file_packager.py
#   + scan for "data_target" -> ensure these are "escape_for_js_string(data_target)" where needed
#
# - path: Engine/Extras/ThirdPartyNotUE/emsdk/emscripten/<version>/tools/shared.py
#   + scan for "logging.warning" -> ensure these are "logging.info" where needed
#     -- i.e. java & closure
#     -- "source tree above" can also be marked as info = these have not been checked into perforce
#     CIS marks these and will SPAM developers -- doing this will reduce the noise




# optimization flags used in emscripten and their UE4 equivalents:
#     -03 release: shipping (higher compile time)
#     -02 release: development
#     -0z release: for size (at the cost of performance)
#     -00 debug
# for details, see: .../Engine/Source/Programs/UnrealBuildTool/HTML5/HTML5ToolChain.cs
#     GetCLArguments_Global() & GetLinkArguments()


# CMakefile projects - the following will prove to be useful:
#
# while using one of these:
#     export LIB_SUFFIX=
#     export LIB_SUFFIX=_Oz
#     export LIB_SUFFIX=_O2
#     export LIB_SUFFIX=_O3
#
# double check CMake files for either:
#     sed -e "s/\(add_library(libprojectname\)/\1$LIB_SUFFIX/" ../CMakeLists.txt.save > ../CMakeLists.txt
# - or -
#     SET(CMAKE_DEBUG_POSTFIX $ENV{LIB_SUFFIX})
#     SET(CMAKE_PROFILE_POSTFIX $ENV{LIB_SUFFIX})
#     SET(CMAKE_CHECKED_POSTFIX $ENV{LIB_SUFFIX})
#     SET(CMAKE_RELEASE_POSTFIX $ENV{LIB_SUFFIX})
#
# then, i try to always build: -DCMAKE_BUILD_TYPE="Release"
# - and because of that, while the following could have been used:
#     SET(CMAKE_CXX_FLAGS_DEBUG "-O0 -g")
#     SET(CMAKE_CXX_FLAGS_CHECKED "-O2")
#     SET(CMAKE_CXX_FLAGS_PROFILE "-O2")
#     SET(CMAKE_CXX_FLAGS_RELEASE "-O3")
# - but, Emscripten.cmake always uses -O2 -- which needs to be modified on the fly:
#	sed -e "s/\(EPIC_BUILD_FLAGS\} \).*-O2\"/\1$OPTIMIZATION\"/" "$EMSCRIPTEN/cmake/Modules/Platform/Emscripten.cmake" > $MAKE_PATH$OPTIMIZATION/Emscripten.cmake




# ================================================================================
# hacks no longer needed
# left here for reference
# ================================================================================

# - edit Engine/Extras/ThirdPartyNotUE/emsdk/emscripten/<version>/cmake/Modules/Platform/Emscripten.cmake
#   + uncomment:
#     SET(CMAKE_STATIC_LIBRARY_SUFFIX ".bc")
#     SET(CMAKE_SHARED_LIBRARY_SUFFIX ".bc")
#   + add:
#     SET(EPIC_BUILD_FLAGS "-msse -msse2 -s FULL_ES2=1 -s SIMD=1 -s USE_PTHREADS=1")
#
# - path: Engine/Extras/ThirdPartyNotUE/emsdk/emscripten/<version>/system/include/emscripten
#   + copy: vector.h to em_vector.h
#   + edit: xmmintrin.h and change:
#     -- from: #include <vector.h>
#     -- to:   #include <em_vector.h>
#
#     this is because on case-insensitive filesystems (i.e. windows)
#     it is getting lost with:
#     -- Engine/Source/Runtime/Core/Public/Math/Vector.h