xref: /third_party/libwebsockets/contrib/cross-w32.cmake

#
# CMake Toolchain file for crosscompiling on 32bit Windows platforms.
#
# This can be used when running cmake in the following way:
#  cd build/
#  cmake .. -DCMAKE_TOOLCHAIN_FILE=../contrib/cross-w32.cmake -DLWS_WITH_SSL=0
#

# the outermost path to your cross toolchain
#set(CROSS_PATH /opt/mingw32)
set(CROSS_PATH /usr)
# your cross root
set(CROSS_ROOT ${CROSS_PATH}/i686-w64-mingw32/sys-root/)

# Target operating system name.
set(CMAKE_SYSTEM_NAME Windows)

# Name of C compiler.
set(CMAKE_C_COMPILER "${CROSS_PATH}/bin/i686-w64-mingw32-gcc")
set(CMAKE_CXX_COMPILER "${CROSS_PATH}/bin/i686-w64-mingw32-g++")
set(CMAKE_RC_COMPILER "${CROSS_PATH}/bin/i686-w64-mingw32-windres")

#
# Different build system distros set release optimization level to different
# things according to their local policy, eg, Fedora is -O2 and Ubuntu is -O3
# here.  Actually the build system's local policy is completely unrelated to
# our desire for cross-build release optimization policy for code built to run
# on a completely different target than the build system itself.
#
# Since this goes last on the compiler commandline we have to override it to a
# sane value for cross-build here.  Notice some gcc versions enable broken
# optimizations with -O3.
#
if (CMAKE_BUILD_TYPE MATCHES RELEASE OR CMAKE_BUILD_TYPE MATCHES Release OR CMAKE_BUILD_TYPE MATCHES release)
	set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O2")
	set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2")
endif()

# Where to look for the target environment. (More paths can be added here)
set(CMAKE_FIND_ROOT_PATH "${CROSS_ROOT}/mingw")
set(CMAKE_SYSROOT ${CROSS_ROOT})

# Adjust the default behavior of the FIND_XXX() commands:
# search programs in the host environment only.
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)

# Search headers and libraries in the target environment only.
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)