Update Makefile for partial static compilation on freebsd

Makefile

@@ -92,15 +92,17 @@ ifneq ($(PLATFORM) $(ARCH),macos arm64)
 endif
 
 ifeq ($(STATIC),true)
-	ifeq ($(CXX_IS_CLANG),true)
+	ifeq ($(CXX_IS_CLANG) $(CLANG_WORKS),true true)
 		ifeq ($(shell $(CXX) -print-target-triple | grep gnu >/dev/null; echo $$?),0)
 $(error $(shell printf "\033[1;91mERROR: \033[97m$(CXX) can't statically link glibc\033[0m"))
 		endif
 	else
 		override ADDFLAGS += -static-libgcc -static-libstdc++
 	endif
-	ifneq ($(PLATFORM),macos)
+	ifeq ($(PLATFORM_LC),linux)
 		override ADDFLAGS += -DSTATIC_BUILD -static -Wl,--fatal-warnings
+	else ifeq ($(PLATFORM_LC),freebsd)
+		override ADDFLAGS += -DSTATIC_BUILD
 	endif
 endif
 
@@ -123,7 +125,10 @@ else ifeq ($(PLATFORM_LC),freebsd)
 	PLATFORM_DIR := freebsd
 	THREADS	:= $(shell getconf NPROCESSORS_ONLN 2>/dev/null || echo 1)
 	SU_GROUP := wheel
-	override ADDFLAGS += -lstdc++ -lm -lkvm -ldevstat -Wl,-rpath=/usr/local/lib/gcc$(CXX_VERSION_MAJOR)
+	override ADDFLAGS += -lm -lkvm -ldevstat -Wl,-rpath=/usr/local/lib/gcc$(CXX_VERSION_MAJOR)
+	ifneq ($(STATIC),true)
+		override ADDFLAGS += -lstdc++
+	endif
 	export MAKE = gmake
 else ifeq ($(PLATFORM_LC),macos)
 	PLATFORM_DIR := osx

README.md

@@ -510,6 +510,8 @@ Also needs a UTF8 locale and a font that covers:
 
    Append `VERBOSE=true` to display full compiler/linker commands.
 
+   Append `STATIC=true` for static compilation (only libgcc and libstdc++ will be static!).
+
    Append `QUIET=true` for less verbose output.
 
    Append `STRIP=true` to force stripping of debug symbols (adds `-s` linker flag).