Add thinlto support. Closes #7493.

3 files changed, 12 insertions, 3 deletions

diff --git a/mesonbuild/compilers/mixins/clang.py b/mesonbuild/compilers/mixins/clang.py
index acdb352..773d9dc 100644
--- a/mesonbuild/compilers/mixins/clang.py
+++ b/mesonbuild/compilers/mixins/clang.py
@@ -77,6 +77,13 @@ class ClangCompiler(GnuLikeCompiler):
         # so it might change semantics at any time.
         return ['-include-pch', os.path.join(pch_dir, self.get_pch_name(header))]
 
+    def get_lto_compile_args(self, lto_type: str) -> T.List[str]:
+        if lto_type == 'thin':
+            return ['-flto=thin']
+        if lto_type == 'true':
+            return ['-flto']
+        return []
+
     def get_compiler_check_args(self, mode: CompileCheckMode) -> T.List[str]:
         myargs = []  # type: T.List[str]
         if mode is CompileCheckMode.COMPILE:
diff --git a/mesonbuild/compilers/mixins/gnu.py b/mesonbuild/compilers/mixins/gnu.py
index bb1fc66..5771ad8 100644
--- a/mesonbuild/compilers/mixins/gnu.py
+++ b/mesonbuild/compilers/mixins/gnu.py
@@ -295,8 +295,10 @@ class GnuLikeCompiler(Compiler, metaclass=abc.ABCMeta):
                 return self._split_fetch_real_dirs(line.split('=', 1)[1])
         return []
 
-    def get_lto_compile_args(self) -> T.List[str]:
-        return ['-flto']
+    def get_lto_compile_args(self, lto_type: str) -> T.List[str]:
+        if lto_type != 'false':
+            return ['-flto']
+        return []
 
     def sanitizer_compile_args(self, value: str) -> T.List[str]:
         if value == 'none':
diff --git a/mesonbuild/compilers/mixins/islinker.py b/mesonbuild/compilers/mixins/islinker.py
index 2445eec..67ac497 100644
--- a/mesonbuild/compilers/mixins/islinker.py
+++ b/mesonbuild/compilers/mixins/islinker.py
@@ -48,7 +48,7 @@ class BasicLinkerIsCompilerMixin(Compiler):
     def sanitizer_link_args(self, value: str) -> T.List[str]:
         return []
 
-    def get_lto_link_args(self) -> T.List[str]:
+    def get_lto_link_args(self, lto_type: str) -> T.List[str]:
         return []
 
     def can_linker_accept_rsp(self) -> bool: