example makesfile to build jq

makesfile

#!/bin/sh
set -e
set -x

function clean {
	rm -f src/version.h
	rm -f src/builtin.inc
	rm -f src/*.o
	rm -f jq
}

function all {

# Remake the version.h header file if, and only if, the git ID has changed
#.PHONY: .FORCE
#.FORCE:
#generate_ver = ver="`{ $(srcdir)/scripts/version || echo '$(VERSION)' ; } | sed 's/.*/\#define JQ_VERSION \"&\"/'`"
#.remake-version-h: .FORCE
#        @ $(generate_ver); test "x`cat src/version.h 2>/dev/null`" = "x$$ver" || touch .remake-version-h
#src/version.h: .remake-version-h
#        $(AM_V_GEN) $(generate_ver); echo "$$ver" > $@
#src/main.c: src/version.h

makes src/version.h &&
	( ./scripts/version | sed 's/.*/\#define JQ_VERSION \"&\"/' > src/version.h )


#src/builtin.inc: src/builtin.jq
#        $(AM_V_GEN) sed -e 's/\\/\\\\/g' -e 's/"/\\"/g' -e 's/^/"/' -e 's/$$/\\n"/' $^ > $@
#src/builtin.o: src/builtin.inc

makes src/builtin.inc \
	src/builtin.jq &&
	sed -e 's/\\/\\\\/g' -e 's/"/\\"/g' -e 's/^/"/' -e 's/$/\\n"/' src/builtin.jq > src/builtin.inc


#BUILT_SOURCES = src/lexer.h src/lexer.c src/parser.h src/parser.c       \
#                src/builtin.inc src/version.h
#src/lexer.c: src/lexer.l
#        $(AM_V_LEX) flex -o src/lexer.c --header-file=src/lexer.h $<
#src/lexer.h: src/lexer.c
makes src/lexer.c \
	src/lexer.l &&
        flex -o src/lexer.c --header-file=src/lexer.h src/lexer.l
makes src/lexer.h \
	src/lexer.c &&
        flex -o src/lexer.c --header-file=src/lexer.h src/lexer.l

#AC_C_BIGENDIAN(
#   AC_DEFINE([IEEE_MC68k], 1, [machine is bigendian]),
#   AC_DEFINE([IEEE_8087], 1, [machine is littleendian]),
#   AC_MSG_ERROR(unknown endianess),
#   AC_MSG_ERROR(universial endianess not supported)
#)
CFLAGS+="-DIEEE_8087=1"

find src/ -iname '*.c' -print0 | \
	while IFS="" read -r -d "" file ; do
		echo processing "$file" ;
	 	makes "${file%.c}.o" \
			"$file" src/version.h src/builtin.inc &&
			gcc -c -o "${file%.c}.o" $CFLAGS -I . "$file" || exit
		true
	done

OBJECTS=" \
	./src/jv_print.o \
	./src/jv_unicode.o \
	./src/jv_aux.o \
	./src/jv_alloc.o \
	./src/jv_file.o \
	./src/jv_dtoa.o \
	./src/jq_test.o \
	./src/jv_parse.o \
	./src/parser.o \
	./src/main.o \
	./src/bytecode.o \
	./src/builtin.o \
	./src/inject_errors.o \
	./src/lexer.o \
	./src/util.o \
	./src/locfile.o \
	./src/linker.o \
	./src/jv.o \
	./src/execute.o \
	./src/compile.o \
	"
makes jq \
	$OBJECTS &&
	gcc -o jq -lm -ldl $OBJECTS

}

TARGET="${1:-all}"
case $TARGET in
clean*)
	clean
	;;
all*)
	all
	;;
esac