Add logic to autodetect compiler and fix build with clang on linux

Signed-off-by: Violet Purcell <vimproved@inventati.org>

source/Makefile.deps.mk

@@ -55,6 +55,18 @@ endif # BSD
 # ---------------------------------------------------------------------------------------------------------------------
 # Auto-detect the processor
 
+COMPILER_VERSION := $(shell $(CC) --version)
+
+ifneq (,$(findstring clang,$(COMPILER_VERSION)))
+CLANG = true
+endif
+ifneq (,$(findstring gcc,$(COMPILER_VERSION)))
+GCC = true
+endif
+
+# ---------------------------------------------------------------------------------------------------------------------
+# Auto-detect the processor
+
 TARGET_PROCESSOR := $(firstword $(subst -, ,$(TARGET_MACHINE)))
 
 ifneq (,$(filter i%86,$(TARGET_PROCESSOR)))

source/Makefile.mk

@@ -85,7 +85,7 @@ CXXFLAGS   += -fvisibility-inlines-hidden
 endif
 
 ifneq ($(MACOS_OR_WASM_OR_WINDOWS),true)
-ifneq ($(BSD),true)
+ifeq ($(GCC),true)
 BASE_FLAGS += -fno-gnu-unique
 endif
 endif