clang: Support ThinLTO with mold
@@ -19,7 +19,8 @@ import shutil
import typing as T
from ... import mesonlib
-from ...linkers import AppleDynamicLinker, ClangClDynamicLinker, LLVMDynamicLinker, GnuGoldDynamicLinker
+from ...linkers import AppleDynamicLinker, ClangClDynamicLinker, LLVMDynamicLinker, GnuGoldDynamicLinker, \
+ MoldDynamicLinker
from ...mesonlib import OptionKey
from ..compilers import CompileCheckMode
from .gnu import GnuLikeCompiler
@@ -149,9 +150,13 @@ class ClangCompiler(GnuLikeCompiler):
def get_lto_compile_args(self, *, threads: int = 0, mode: str = 'default') -> T.List[str]:
args: T.List[str] = []
if mode == 'thin':
- # Thin LTO requires the use of gold, lld, ld64, or lld-link
- if not isinstance(self.linker, (AppleDynamicLinker, ClangClDynamicLinker, LLVMDynamicLinker, GnuGoldDynamicLinker)):
- raise mesonlib.MesonException(f"LLVM's thinLTO only works with gnu gold, lld, lld-link, and ld64, not {self.linker.id}")
+ # ThinLTO requires the use of gold, lld, ld64, lld-link or mold 1.1+
+ if isinstance(self.linker, (MoldDynamicLinker)):
+ # https://github.com/rui314/mold/commit/46995bcfc3e3113133620bf16445c5f13cd76a18
+ if not mesonlib.version_compare(self.linker.version, '>=1.1'):
+ raise mesonlib.MesonException("LLVM's ThinLTO requires mold 1.1+")
+ elif not isinstance(self.linker, (AppleDynamicLinker, ClangClDynamicLinker, LLVMDynamicLinker, GnuGoldDynamicLinker)):
+ raise mesonlib.MesonException(f"LLVM's ThinLTO only works with gold, lld, lld-link, ld64 or mold, not {self.linker.id}")
args.append(f'-flto={mode}')
else:
assert mode == 'default', 'someone forgot to wire something up'
