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RESOURCES_LIBRARY()
DEFAULT(LLD_VERSION ${CLANG_VER})
TOOLCHAIN(lld)
VERSION(${LLD_VERSION})
# There is no backward compatibility between LLVM IR versions 16 and 18.
# So, we need to select lld18 when using clang18 to compile src in LTO mode.
IF (LLD_VERSION == 18)
DECLARE_EXTERNAL_HOST_RESOURCES_BUNDLE_BY_JSON(LLD_ROOT lld18.json)
ELSEIF (LLD_VERSION == 16)
DECLARE_EXTERNAL_HOST_RESOURCES_BUNDLE_BY_JSON(LLD_ROOT lld16.json)
ENDIF()
IF (OS_ANDROID)
# Use LLD shipped with Android NDK.
LDFLAGS(
-fuse-ld=lld
)
IF (ANDROID_API < 29)
# Dynamic linker on Android does not support lld's default rosegment
# prior to API Level 29 (Android Q)
# See:
# https://android.googlesource.com/platform/ndk/+/master/docs/BuildSystemMaintainers.md#additional-required-arguments
# https://github.com/android/ndk/issues/1196
LDFLAGS(
-Wl,--no-rosegment
)
ENDIF()
# Enable optimized relocations format (e.g. .rela.dyn section) to reduce binary size
# See:
# https://android.googlesource.com/platform/ndk/+/master/docs/BuildSystemMaintainers.md#relr-and-relocation-packing
IF (ANDROID_API >= 30)
LDFLAGS(-Wl,--pack-dyn-relocs=android+relr)
ELSEIF (ANDROID_API >= 28)
LDFLAGS(-Wl,--pack-dyn-relocs=android+relr,--use-android-relr-tags)
ELSEIF (ANDROID_API >= 23)
LDFLAGS(-Wl,--pack-dyn-relocs=android)
ENDIF()
ELSEIF (OS_LINUX)
LDFLAGS(
-fuse-ld=lld
--ld-path=${LLD_ROOT_RESOURCE_GLOBAL}/bin/ld.lld
# dynlinker on auld ubuntu versions can not handle .rodata stored in standalone segment [citation needed]
-Wl,--no-rosegment
# add build-id to binaries to allow external tools check equality of binaries
-Wl,--build-id=sha1
)
ELSEIF (OS_DARWIN OR OS_IOS)
LDFLAGS(
-fuse-ld=lld
--ld-path=${LLD_ROOT_RESOURCE_GLOBAL}/bin/ld64.lld
)
ELSEIF (OS_EMSCRIPTEN)
LDFLAGS(
-fuse-ld=${LLD_ROOT_RESOURCE_GLOBAL}/bin/wasm-ld
# FIXME: Linker does not capture "ld-path" and therefore it can not find "wasm-ld"
)
ENDIF()
END()
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