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# Copyright 2023 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Input variables:
# CROSS_COMPILE: the prefix of the cross compiler.
# CC_NAME: the name of the C compiler.
# CXX_NAME: the name of the C++ compiler.
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
set(CMAKE_C_COMPILER "${CROSS_COMPILE}${CC_NAME}")
set(CMAKE_CXX_COMPILER "${CROSS_COMPILE}${CXX_NAME}")
set(CMAKE_OBJCOPY "${CROSS_COMPILE}objcopy")
set(CMAKE_OBJDUMP "${CROSS_COMPILE}objdump")
set(CMAKE_READELF "${CROSS_COMPILE}readelf")
if ("${CC_NAME}" STREQUAL "gcc")
set(CMAKE_LINKER "${CROSS_COMPILE}ld")
else()
set(CMAKE_LINKER "${CROSS_COMPILE}ld.lld")
endif()
# This is only for host unittests build.
if ("${CC_NAME}" STREQUAL gcc AND "${CMAKE_SYSROOT}" STREQUAL "")
set(CMAKE_AR "${CROSS_COMPILE}gcc-ar")
set(CMAKE_NM "${CROSS_COMPILE}gcc-nm")
set(CMAKE_RANLIB "${CROSS_COMPILE}gcc-ranlib")
else()
set(CMAKE_AR "${CROSS_COMPILE}ar")
set(CMAKE_NM "${CROSS_COMPILE}nm")
set(CMAKE_RANLIB "${CROSS_COMPILE}ranlib")
endif()
if ("${CC_NAME}" STREQUAL gcc)
add_compile_options(-Os)
else()
add_compile_options(-Oz)
endif()
# Enable Link Time Optimization.
add_compile_options(-flto)
add_link_options(-flto)
# See https://www.chromium.org/chromium-os/build/c-exception-support
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables")
set(CMAKE_POSITION_INDEPENDENT_CODE OFF)
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
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