# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

# We need to build a 64-bits binary during a 32-bits build. This requires
# a different compiler and different library paths. Until the build system
# supports this natively.

# Some Make magic to avoid CXX and LIB being evaluated when nothing
# is built in this directory
lazy = $(if $(___$(1)),,$(eval ___$(1) := $(2)))$(___$(1))

# We could use the `which` python module, but it needs more code to handle
# the situation where CXX points to an absolute path. But using the shell
# which returns a msys path, while we need a windows path. So force msys
# to do the conversion for us by calling python with an environment variable
# with the result of the call to `which`. Then munge that path to add the
# x64 cross-compiler path.
ifdef MOZ_USING_COMPILER_WRAPPER
ORIG_CXX := cl
else
ORIG_CXX := $(CXX)
endif
CXX = $(call lazy,CXX,"$$(subst amd64_x86/x86_amd64/,amd64/,$$(shell CL=`which "$(ORIG_CXX)"` $(PYTHON) -c 'import os; print os.path.dirname(os.environ["CL"])')/x86_amd64/cl.exe)")

MOZ_WINCONSOLE = 0

include $(topsrcdir)/config/config.mk

# Munge the LIB variable to contain paths to the x64 CRT and system libraries.
# Unconveniently, none of the paths have the same convention, including the
# compiler path above.
LIB = $(call lazy,LIB,$$(shell python -c 'import os; print ";".join(s.lower().replace(os.sep, "/").replace("/vc/lib", "/vc/lib/amd64").replace("/um/x86", "/um/x64").replace("/ucrt/x86", "/ucrt/x64") for s in os.environ["LIB"].split(";"))'))

CXXFLAGS := $(filter-out -arch:%,$(CXXFLAGS))

# OS_COMPILE_CXXFLAGS includes mozilla-config.h, which contains x86-specific
# defines breaking the build.
OS_COMPILE_CXXFLAGS :=

# LNK1246: '/SAFESEH' not compatible with 'x64' target machine
LDFLAGS := $(filter-out -SAFESEH,$(LDFLAGS))

# When targetting x64, we need to specify a subsystem of at least 5.02, because
# the 5.01 value we inherit from the x86 parts is silently ignored, making the
# linker default to 6.00 (Vista) as of VS2013.
WIN32_GUI_EXE_LDFLAGS=-SUBSYSTEM:WINDOWS,5.02