# Generic GNU Makefile
# Version 2.21
#
# Mark Allman (mallman@ir.bbn.com)
# BBN Technologies/NASA GRC
#
# Last Updated: Fri Apr  5, 2002

# General variables...

CC := gcc
CFLAGS := -g
CCC := g++
CCFLAGS := $(CFLAGS)
YACC := yacc
YFLAGS :=
LEX := lex
LFLAGS :=
PC := pc
PFLAGS := -g
FC := f77
FFLAGS := -g
AS := $(CC)
ASFLAGS := -g -c
JAVACC := gcj
JAVAFLAGS := -g
JLIBS :=
LD := $(CC)
EXE := a.out

# Find all source files...

CSRCS := $(notdir $(wildcard *.[cs]))
CCSRCS := $(notdir $(wildcard *.cc))
PSRCS := $(notdir $(wildcard *.p))
FSRCS := $(notdir $(wildcard *.f))
JSRCS := $(notdir $(wildcard *.java))

YSRCS := $(notdir $(wildcard *.y))
ifneq ($(strip $(YSRCS)),)
	ODD_OBJS += y.tab.o
endif

LSRCS := $(notdir $(wildcard *.l))
ifneq ($(strip $(LSRCS)),)
	ODD_OBJS += lex.yy.o
endif

SOURCES := $(CSRCS) $(CCSRCS) $(PSRCS) $(FSRCS)
OBJECTS := $(ODD_OBJS) $(addsuffix .o, $(basename $(SOURCES)))
JCLASS := $(addsuffix .class, $(basename $(JSRCS)))
JCLASS_ALL := $(addsuffix *.class, $(basename $(JSRCS)))

# Include needed libraries...

LIBS := -lm

ifneq ($(strip $(PSRCS)),)
	LIBS += -lp
endif
ifneq ($(strip $(FSRCS)),)
	LIBS += -lf2c
endif
ifneq ($(strip $(CCSRCS)),)
	LIBS += -lg++
endif
ifneq ($(strip $(LSRCS)),)
	LIBS += -ll
endif

ARCH := $(shell uname)
ifeq ($(ARCH),SunOS)
	VERS := $(shell uname -r)
	ifeq ($(basename $(VERS)),5)
		LIBS += -L/usr/ucblib -lsocket -lnsl -lelf -lucb
	endif
endif
ifeq ($(ARCH),FreeBSD)
	JLIBS += -pthread
endif

# Determine what output we need to generate...

TODO :=

ifneq ($(strip $(OBJECTS)),)
	TODO += standard
endif

ifneq ($(strip $(JCLASS)),)
	TODO += javabin
	MAIN := $(shell jv-scan --print-main *.java)
endif

default: $(TODO)

# Compile a binary from a bunch of non-java sources.

standard: $(OBJECTS)
	$(LD) $(CFLAGS) $(OBJECTS) -o $(EXE) $(LIBS)

# Compile to byte-code...

javabin: $(JCLASS)
	$(JAVACC) -o $(EXE) --main=$(MAIN) $(JCLASS) $(JLIBS)

%.class: %.java
	$(JAVACC) -C $(JAVAFLAGS) $<

# Lex/Yacc Rules...

y.tab.o: y.tab.c
	$(CC) -c y.tab.c

y.tab.c: $(YSRCS)
	$(YACC) -dvt $(YFLAGS) $<

lex.yy.c: $(LSRCS)
	$(LEX) $(LFLAGS) $<

# Cleaning rules...

clean:
	rm -f $(OBJECTS) $(JCLASS_ALL) lex.yy.c y.tab.c y.tab.h y.output core

clobber: clean
	rm -f $(EXE)