Makefile.uk: Don't add unsupported warnings when built with clang

Clang (12.0.0) does not recognize the warnings: no-unused-but-set-variable, no-maybe-uninitialized, no-builtin-declaration-mismatch. It would print "unknown warning option" warning messages during compilation. These should be enabled only when compiling with GCC (tested with 11.3.0). GitHub-Fixes: unikraft#1 Co-authored-by: Nikos Oikonomou <[email protected]> Signed-off-by: Nikos Oikonomou <[email protected]> Signed-off-by: Groute <[email protected]>
iAmGroute · May 10, 2023 · 6567bec · 6567bec
1 parent 60ba9f5
commit 6567bec
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/Makefile.uk b/Makefile.uk
@@ -71,9 +71,10 @@ CXXINCLUDES-$(CONFIG_LIBCOMPILER_RT) += -I$(LIBCOMPILER_RT_SRC)/include
 # Global flags
 ################################################################################
 
-LIBCOMPILER_RT_SUPPRESS_FLAGS += -Wno-unused-parameter -Wno-builtin-declaration-mismatch
-LIBCOMPILER_RT_CFLAGS-y   += $(LIBCOMPILER_RT_SUPPRESS_FLAGS)
-LIBCOMPILER_RT_CXXFLAGS-y += $(LIBCOMPILER_RT_SUPPRESS_FLAGS)
+LIBCOMPILER_RT_SUPPRESS_FLAGS-$(call have_gcc) += -Wno-unused-but-set-variable -Wno-maybe-uninitialized -Wno-builtin-declaration-mismatch
+LIBCOMPILER_RT_SUPPRESS_FLAGS-y += -Wno-unused-parameter
+LIBCOMPILER_RT_CFLAGS-y   += $(LIBCOMPILER_RT_SUPPRESS_FLAGS-y)
+LIBCOMPILER_RT_CXXFLAGS-y += $(LIBCOMPILER_RT_SUPPRESS_FLAGS-y)
 
 ################################################################################
 # Library sources