Disable automatic use of lld when using link-time optimization

1 files changed, 5 insertions, 1 deletions

diff --git a/src/main.cpp b/src/main.cpp
index 3c2ad46..de09301 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -666,7 +666,11 @@ static int buildProject(int argc, const _tinydir_char_t **argv, bool run)
 
     // TODO: Make mold the default linker if it's installed and the installed gcc version supports it with -fuse-ld= option
     if(linker.empty()) {
-        if(is_lld_linker_installed())
+        // Static object files compiled with gcc are not compatible with lld (llvm linker)
+        // and we dont know which compiler was used to compile to code so we disable automatic
+        // use of lld by default. The user can still force lld with --linker=lld, if they are
+        // sure that they used clang to compile the code.
+        if(!use_lto && is_lld_linker_installed())
             linker = "lld";
         else if(is_gold_linker_installed())
             linker = "gold";