Revert -flto=auto on mingw

causes issues on some installations (glinscott/fishtest#1255).

closes https://github.com/official-stockfish/Stockfish/pull/3898

No functional change

diff --git a/src/Makefile b/src/Makefile
index 1b1212994881508ef9f021c33449758e68c3fa70..5f3e739f788fc47fa182ba54be5ad8d7492d9fa7 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -683,7 +683,7 @@ ifeq ($(debug), no)
 # the tool chain requires gcc version 10.1 or later.
        else ifeq ($(comp),mingw)
        ifneq ($(arch),i386)
-               CXXFLAGS += -flto=auto
+               CXXFLAGS += -flto
                LDFLAGS += $(CXXFLAGS) -save-temps
        endif
        endif