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Kernel: Use the C preprocessor to avoid two copies of the linker script

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This commit is contained in:
Gunnar Beutner 2021-07-20 10:40:09 +02:00 • committed by Andreas Kling
parent 56f952a5f2
commit 2019cf3289
3 changed files with 21 additions and 101 deletions
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16
Kernel/CMakeLists.txt
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@ -356,11 +356,9 @@ endif()
if ("${SERENITY_ARCH}" STREQUAL "x86_64")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcmodel=large -fno-pic -mno-red-zone")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -faligned-new=8")
set(KERNEL_LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/linker_amd64.ld)
else()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pie -fPIE")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -faligned-new=4")
set(KERNEL_LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/linker_i386.ld)
endif()
# Kernel Undefined Behavior Sanitizer (KUBSAN)
@ -396,8 +394,18 @@ endif()
add_executable(Kernel ${SOURCES})
add_dependencies(Kernel generate_EscapeSequenceStateMachine.h)
target_link_options(Kernel PRIVATE LINKER:-T ${KERNEL_LINKER_SCRIPT} -nostdlib)
set_target_properties(Kernel PROPERTIES LINK_DEPENDS ${KERNEL_LINKER_SCRIPT})
add_custom_command(
OUTPUT linker.ld
COMMAND "${CMAKE_CXX_COMPILER}" -E -P -x c -I${CMAKE_CURRENT_SOURCE_DIR}/.. "${CMAKE_CURRENT_SOURCE_DIR}/linker.ld" -o "${CMAKE_CURRENT_BINARY_DIR}/linker.ld"
MAIN_DEPENDENCY "${CMAKE_CURRENT_SOURCE_DIR}/linker.ld"
COMMENT "Preprocessing linker.ld"
VERBATIM
)
add_custom_target(generate_kernel_linker_script DEPENDS linker.ld)
target_link_options(Kernel PRIVATE LINKER:-T ${CMAKE_CURRENT_BINARY_DIR}/linker.ld -nostdlib)
set_target_properties(Kernel PROPERTIES LINK_DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/linker.ld")
if (ENABLE_KERNEL_LTO)
include(CheckIPOSupported)