I have the following in my Makefile.am, and automake is not using the rule to
build the executable.
tableopts_nr%.c: tableopts.l4
$(FLEX) -P $(subst -,_,$(*F)) $* -o $@ $<
tableopts_nr%.$(OBJEXT): tableopts_nr%.c
$(COMPILE) -c -o $@ $<
tableopts_nr%.tableopts$(EXEEXT): tableopts_nr.$(OBJEXT)
$(LINK) $^
The % is matching various things like -Ca and so on that are options to flex
for different kinds of tables that flex can produce. This is in the test suite
and I've generated the long list of _SOURCES variables and the programs are
listed in CHECK_PROGRAMS and TESTS.
The .tableopts suffix is present because I'm using the parallel test harness
to distinguish between various kinds of tests in the flex test suite that need
different kinds of arguments when they're run.
THe output from trying to build the program with the Makefile.am as above looks
like this:
/bin/bash ../libtool --tag=CC --mode=link gcc -g -O2 -o
tableopts_nr-Ca.tableopts -lm
libtool: link: gcc -g -O2 -o tableopts_nr-Ca.tableopts -lm
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/crt1.o: In function
`_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status
As a test, I did try explicitly listing tableopts_nr-Ca.tableopts$(EXEEXT) as a
target and make did build the program correctly.
How do I get automake to recognize my pattern rule? Or, if there's another way
to do this that's easier / better, what is that?
Thanks,
--Will
