X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2FMakefile;h=c3660a20fa674739009e3fe65eb9ba9a06e2d8fa;hp=492403d3ce875b60e4027710c951b9b94a5e3f64;hb=ca41ee6632368676a2fb98fd2970ac9b183f0aa9;hpb=aecfca2dc2d760df257e18cd6b29d266a3c3e68a

diff --git a/src/Makefile b/src/Makefile
index 492403d3..c3660a20 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -344,10 +344,20 @@ endif
 ### needs access to the optimization flags.
 ifeq ($(optimize),yes)
 ifeq ($(debug), no)
-	ifeq ($(comp),$(filter $(comp),gcc clang mingw))
+	ifeq ($(comp),$(filter $(comp),gcc clang))
 		CXXFLAGS += -flto
 		LDFLAGS += $(CXXFLAGS)
 	endif
+
+# To use LTO and static linking on windows, the tool chain requires a recent gcc:
+# gcc version 10.1 in msys2 or TDM-GCC version 9.2 are know to work, older might not.
+# So, only enable it for a cross from Linux by default.
+	ifeq ($(comp),mingw)
+	ifeq ($(KERNEL),Linux)
+		CXXFLAGS += -flto
+		LDFLAGS += $(CXXFLAGS)
+	endif
+	endif
 endif
 endif