Allow passing RTLIB=compiler-rt to make

justinkb · MichaelB7 · commit 1489275a0c07 · 2021-07-06T00:36:24.000-04:00
Not all linux users will have libatomic installed. When using clang as the system compiler with compiler-rt as the default runtime library instead of libgcc, atomic builtins may be provided by compiler-rt. This change allows such users to pass RTLIB=compiler-rt to make sure the build doesn't error out on the missing (unnecessary) libatomic. closes official-stockfish#3597 No functional change
diff --git a/src/Makefile b/src/Makefile
@@ -387,10 +387,12 @@ ifeq ($(COMP),clang)
 	ifneq ($(KERNEL),Darwin)
 	ifneq ($(KERNEL),OpenBSD)
 	ifneq ($(KERNEL),FreeBSD)
+	ifneq ($(RTLIB),compiler-rt)
 		LDFLAGS += -latomic
 	endif
 	endif
 	endif
+	endif
 
 	ifeq ($(arch),$(filter $(arch),armv7 armv8))
 		ifeq ($(OS),Android)
