Added some more coments.
# include the system specific Makefile
#include ../../../Makefile.$(shell uname)
default: all
.PHONY: iec.flex
all: iec.flex.o iec.y.o
clean:
-rm -f *.o Makefile.depend
-rm -f iec.flex.c iec.y.cc iec.y.hh iec.y.output
-rm -f test_flex
#get warnings, debugging information and optimization
CFLAGS = -Wall -pedantic -Wpointer-arith -Wwrite-strings
# CFLAGS += -Werror
CFLAGS += -ggdb -O3 -funroll-loops
# Note: if the optimizer crashes, we'll leave out the -O3 for those files
CFLAGS += -I. -I../* -I../../absyntax
test_flex: iec.flex.c iec.y.hh
$(CXX) -o test_flex.o -c iec.flex.c -DTEST_MAIN $(CFLAGS)
$(CXX) -o test_flex test_flex.o
# $(CXX) -o test_flex test_flex.o ../util/symtable.o -DTEST_MAIN
iec.flex.c: iec.flex
flex -oiec.flex.c iec.flex
iec.flex.o: iec.y.hh iec.flex.c
$(CXX) -c iec.flex.c -D LIBDIRECTORY='"$(IECLIBDIR)"' $(CFLAGS)
iec.y.hh iec.y.cc: iec.y
bison -d -v -o iec.y.cc iec.y
iec.y.o: iec.y.cc iec.y.hh
$(CXX) -c iec.y.cc -D LIBDIRECTORY='"$(IECLIBDIR)"' $(CFLAGS)
#how to make things from other directories if they are missing
../% /%:
$(MAKE) -C $(@D) $(@F)