From 19215d5795973d5eb5cbb171d06335f184ac5c46 Mon Sep 17 00:00:00 2001
From: veclavtalica <veclvatalica@poto.cafe>
Date: Mon, 4 Nov 2024 08:32:10 +0300
Subject: [PATCH] thinlto with either GNUgold or LDD supported

---
 CMakeLists.txt | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0e8e74b..d1492e6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -175,10 +175,18 @@ function(give_options_without_warnings target)
 		$<$<BOOL:${TWN_SANITIZE}>:-fstack-protector-all -fsanitize=undefined -fsanitize=address>
                 $<$<BOOL:${EMSCRIPTEN}>:-gsource-map>)
 
-        set(BUILD_SHARED_LIBRARY_FLAGS_RELEASE
-                -Wl,--gc-sections # TODO: is it even needed with LTO?
-                $<$<STREQUAL:${CMAKE_C_COMPILER_ID},Clang>:-Wl,-plugin-opt,cache-dir=${CMAKE_CURRENT_BINARY_DIR}/linker-cache/>
-                $<$<STREQUAL:${CMAKE_C_COMPILER_ID},Clang>:-Wl,-plugin-opt,cache-policy=prune_after=30m>)
+        if (CMAKE_C_COMPILER_LINKER_ID MATCHES GNUgold)
+                set(THINLTO_USAGE "-plugin-opt,")
+        endif()
+        if (CMAKE_C_COMPILER_LINKER_ID MATCHES LLD)
+                set(THINLTO_USAGE "--thinlto-")
+        endif()
+
+        if (THINLTO_USAGE)
+                set(BUILD_SHARED_LIBRARY_FLAGS_RELEASE
+                        $<$<STREQUAL:${CMAKE_C_COMPILER_ID},Clang>:-Wl,${THINLTO_USAGE}cache-dir=${CMAKE_CURRENT_BINARY_DIR}/linker-cache/>
+                        $<$<STREQUAL:${CMAKE_C_COMPILER_ID},Clang>:-Wl,${THINLTO_USAGE}cache-policy=prune_after=30m>)
+        endif()
 
         target_compile_options(${target} PUBLIC
                                          ${BUILD_FLAGS}