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ladybird/Meta/CMake/use_linker.cmake

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Meta: Link Lagom with LLD by default and allow configuring the linker This ports over the `LADYBIRD_USE_LLD` option from the standalone Ladybird build and generalizes it to work for mold as well: the `LAGOM_USE_LINKER` variable can be set to the desired name of the linker. If it's empty, we default to trying LLD and Mold on ELF platforms (in this order).
2023-09-05 05:40:57 +00:00
# Copyright (c) 2022, Andrew Kaster <akaster@serenityos.org>
# Copyright (c) 2023, Daniel Bertalan <dani@danielbertalan.dev>
#
# SPDX-License-Identifier: BSD-2-Clause
#
CMake: Actually set the LAGOM_USE_LINKER option automatically When this feature was finally merged, the serenity_option in lagom_options.cmake had the unintended side effect of always setting the cache variable to "" in the initial cache. In order to actually set the linker to use to be lld or mold, we need to set with the FORCE flag in the use_linker.cmake file. Found by checking with the CMake variable_watch() function. This will stop the build from spamming the "Using LLD to link Lagom" message all over the place :^)
2023-10-11 18:27:07 +00:00
if (NOT APPLE AND NOT LAGOM_USE_LINKER)
Meta: Link Lagom with LLD by default and allow configuring the linker This ports over the `LADYBIRD_USE_LLD` option from the standalone Ladybird build and generalizes it to work for mold as well: the `LAGOM_USE_LINKER` variable can be set to the desired name of the linker. If it's empty, we default to trying LLD and Mold on ELF platforms (in this order).
2023-09-05 05:40:57 +00:00
find_program(LLD_LINKER NAMES "ld.lld")
if (LLD_LINKER)
CMake: Actually set the LAGOM_USE_LINKER option automatically When this feature was finally merged, the serenity_option in lagom_options.cmake had the unintended side effect of always setting the cache variable to "" in the initial cache. In order to actually set the linker to use to be lld or mold, we need to set with the FORCE flag in the use_linker.cmake file. Found by checking with the CMake variable_watch() function. This will stop the build from spamming the "Using LLD to link Lagom" message all over the place :^)
2023-10-11 18:27:07 +00:00
message(STATUS "Using LLD to link Lagom.")
set(LAGOM_USE_LINKER "lld" CACHE STRING "" FORCE)
Meta: Link Lagom with LLD by default and allow configuring the linker This ports over the `LADYBIRD_USE_LLD` option from the standalone Ladybird build and generalizes it to work for mold as well: the `LAGOM_USE_LINKER` variable can be set to the desired name of the linker. If it's empty, we default to trying LLD and Mold on ELF platforms (in this order).
2023-09-05 05:40:57 +00:00
else()
find_program(MOLD_LINKER NAMES "ld.mold")
if (MOLD_LINKER)
CMake: Actually set the LAGOM_USE_LINKER option automatically When this feature was finally merged, the serenity_option in lagom_options.cmake had the unintended side effect of always setting the cache variable to "" in the initial cache. In order to actually set the linker to use to be lld or mold, we need to set with the FORCE flag in the use_linker.cmake file. Found by checking with the CMake variable_watch() function. This will stop the build from spamming the "Using LLD to link Lagom" message all over the place :^)
2023-10-11 18:27:07 +00:00
message(STATUS "Using mold to link Lagom.")
set(LAGOM_USE_LINKER "mold" CACHE STRING "" FORCE)
Meta: Link Lagom with LLD by default and allow configuring the linker This ports over the `LADYBIRD_USE_LLD` option from the standalone Ladybird build and generalizes it to work for mold as well: the `LAGOM_USE_LINKER` variable can be set to the desired name of the linker. If it's empty, we default to trying LLD and Mold on ELF platforms (in this order).
2023-09-05 05:40:57 +00:00
endif()
endif()
endif()
CMake: Actually set the LAGOM_USE_LINKER option automatically When this feature was finally merged, the serenity_option in lagom_options.cmake had the unintended side effect of always setting the cache variable to "" in the initial cache. In order to actually set the linker to use to be lld or mold, we need to set with the FORCE flag in the use_linker.cmake file. Found by checking with the CMake variable_watch() function. This will stop the build from spamming the "Using LLD to link Lagom" message all over the place :^)
2023-10-11 18:27:07 +00:00
if (LAGOM_USE_LINKER)
Meta: Link Lagom with LLD by default and allow configuring the linker This ports over the `LADYBIRD_USE_LLD` option from the standalone Ladybird build and generalizes it to work for mold as well: the `LAGOM_USE_LINKER` variable can be set to the desired name of the linker. If it's empty, we default to trying LLD and Mold on ELF platforms (in this order).
2023-09-05 05:40:57 +00:00
set(LINKER_FLAG "-fuse-ld=${LAGOM_USE_LINKER}")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${LINKER_FLAG}")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${LINKER_FLAG}")
set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${LINKER_FLAG}")
endif()
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