Handle compiler issues in makefile

Makefile

@@ -13,28 +13,45 @@ BUILD_DIR = build
 LIBRARY_NAME = gpt
 PLATFORM = $(shell uname -s)
 
-ifeq "$(CC)" "gcc"
+# check if gcc is clang as in the case of macos
+GCC_IS_CLANG=$(shell $(CC) --version | grep -i clang >/dev/null && echo yes || echo no)
+CLANG_IS_GCC=$(shell $(CC) --version | grep -i GCC >/dev/null && echo yes || echo no)
+ifeq ($(CC), gcc)
+ifeq ($(GCC_IS_CLANG), yes)
+	$(info Using clang instead of gcc. gcc is aliased to clang on your system.)
+	CC = clang
+endif
+endif
+
+ifeq ($(CC), clang)
+ifeq ($(CLANG_IS_GCC), yes)
+	$(info Using gcc instead of clang. clang is aliased to gcc on your system.)
+	CC = clang
+endif
+endif
+
+ifeq ($(CC),gcc)
 	CFLAGS_RELEASE += -fopenmp -DOMP
 	CFLAGS_DEBUG += -fopenmp -DOMP
 	LDFLAGS += -lgomp
 endif
 
-ifeq "$(CC)" "clang"
+ifeq ($(CC),clang)
 	LDFLAGS += -lomp
 endif
 
-ifeq "$(PLATFORM)" "Darwin"
+ifeq ($(PLATFORM),Darwin)
     SHARED_SUFFIX=dylib
 	BREW_PATH=$(shell brew --prefix)
 	INCLUDES += -I $(BREW_PATH)/opt/libomp/include -I $(BREW_PATH)/opt/argp-standalone/include
 	LDFLAGS += -L $(BREW_PATH)/opt/libomp/lib -L $(BREW_PATH)/opt/argp-standalone/lib
 endif
 
-ifeq "$(PLATFORM)" "Linux"
+ifeq ($(PLATFORM),Linux)
     SHARED_SUFFIX=so
-	ifeq "$(CC)" "clang"
-		CFLAGS_RELEASE += -fopenmp -DOMP
-		CFLAGS_DEBUG += -fopenmp -DOMP
+	ifeq ($(CC),clang)
+		CFLAGS_RELEASE += -Xclang -fopenmp -DOMP
+		CFLAGS_DEBUG += -Xclang -fopenmp -DOMP
 	endif
 endif