[fU-cvs] libfunutil/toc/make flex.make,NONE,1.1

[<sg...@us...>]

Update of /cvsroot/libfunutil/libfunutil/toc/make
In directory sc8-pr-cvs1:/tmp/cvs-serv25087/toc/make

Added Files:
	flex.make 
Log Message:
egg

--- NEW FILE: flex.make ---
#!make
# snippet to compile .flex files into .cpp

# usage:
# define:
#    FLEXES = foo bar
# all: flex_files
# You must have foo.flex for each $(FLEXES) and foo.flex.cpp will
# be generated. It will be "massaged" a bit to allow it to compile
# under newer GCC versions (3.2+ish, i think).

FLEX_CPPFILE_SUFFIX = .cpp
FLEX_FILE_SUFFIX ?= .flex

%$(FLEX_FILE_SUFFIX):# undefine make's implicite rule

FLEX_MAKEFILE = $(toc_makesdir)/flex.make
ifneq (,$(FLEXES))

FLEX_BIN = $(firstword $(wildcard $(addsuffix /flex,$(subst :, ,$(PATH)))))
ifeq (,$(FLEX_BIN))
$(error This makefile snippet requires that 'flex' be found in the PATH!)
endif
FLEX_FLEX_FILES = $(addsuffix $(FLEX_FILE_SUFFIX),$(FLEXES))
FLEX_CPP_FILES = $(addsuffix $(FLEX_CPPFILE_SUFFIX),$(FLEX_FLEX_FILES))

# $(FLEX_FLEX_FILES): Makefile
# %.flex: Makefile
%$(FLEX_FILE_SUFFIX)$(FLEX_CPPFILE_SUFFIX): %$(FLEX_FILE_SUFFIX) $(FLEX_MAKEFILE) Makefile
	@echo "Flexing $< to $@, plus doing iostream hacks :/."; \
	flex -+ -t $< | \
		perl -p \
		-e 's/iostream\.h/iostream/;' \
		-e 'next if m/iostream/;' \
		-e 'next if m/::[io]stream/;' \
		-e 's/(ostream|istream)([^\.])/std::$$1$$2/g;' > $@

CLEAN_FILES += $(FLEX_CPP_FILES)

flexes: $(FLEX_CPP_FILES)

else
flexes:
endif