build: leave alone gcc.mak [dosemu2#16]

Create the private clang.mak.

drivers/makefile

@@ -51,6 +51,3 @@ clean:
 device.lib : $(OBJS)
 	-$(RM) device.lib
 	$(LIBUTIL) $(LIBFLAGS) $@ $(LIBOBJS) $(LIBTERM)
-
-.asm.obj:
-	$(NASM) -D$(COMPILER) $(NASMFLAGS) -f obj -o $@ $<

fdpp/clang.mak

@@ -0,0 +1,36 @@
+#
+# CLANG.MAK - kernel copiler options for clang
+#
+
+DIRSEP=/
+RM=rm -f
+CP=cp
+CC=clang++ -std=c++11
+CL=clang++
+
+TARGETOPT=-c -fno-unwind-tables -fno-asynchronous-unwind-tables \
+    -fno-exceptions -fno-threadsafe-statics -fno-rtti -Wno-inline-new-delete
+ifneq ($(XCPU),386)
+$(error unsupported CPU 186)
+endif
+
+TARGET=fdppkrnl
+
+ALLCFLAGS += -iquote ../hdr $(TARGETOPT) -Wall -fpic -O2 \
+    -ggdb3 -fdebug-macro -fno-strict-aliasing -Wno-format-invalid-specifier
+
+CFLAGS=$(ALLCFLAGS)
+LDFLAGS=-shared -Wl,-Bsymbolic
+CLC = clang
+
+ALLCFLAGS:=$(ALLCFLAGS) -DI386
+
+ifeq ($(XFAT),32)
+ALLCFLAGS:=$(ALLCFLAGS) -DWITHFAT32
+NASMFLAGS:=$(NASMFLAGS) -DWITHFAT32
+endif
+
+NASM=$(XNASM)
+NASMFLAGS   := $(NASMFLAGS) -i../hdr/ -DXCPU=$(XCPU)
+
+LINK=$(XLINK)

fdpp/makefile

@@ -7,7 +7,7 @@ XNASM ?= nasm
 XCPU ?= 386
 XLINK = ../contrib/jwlink
 XFAT ?= 32
-include ../mkfiles/generic.mak
+include clang.mak
 
 LIBS=..$(DIRSEP)lib$(DIRSEP)device.lib
 HDR=../hdr/

mkfiles/generic.mak

@@ -49,3 +49,6 @@ TARGET=$(TARG)$(XCPU)$(XFAT)
 endif
 
 .SUFFIXES: .c .cpp .cc .obj .asm .o
+
+.asm.obj:
+	$(NASM) -D$(COMPILER) $(NASMFLAGS) -f obj -o $@ $<