output directory of generated files

[Thomas Porschberg]

Hi,

we have the following project structure and a file foo.ts:

project/
      +--src/foo.ts
      |
      |
      +--utils/PROG2

The goal is
1) to translate foo.ts to foo.qm (with an external program, say PROG1)
2) to create a header file from the created foo.qm
   (with another helper script PROG2)

We tried to accomplish the task first with the following rules
in Makefile.am of src-directory :

%.qm: %.ts
        $(PROG1) $<

foo.h: foo.qm
        $(top_srcdir)/utils/PROG2 < $< > $@

The problem was that foo.qm was created in project/src
directory and PROG2 could not find the created foo.qm if
the build directory was not src directory.
What I want to say is: When someone created a separate build directory,
say
project/
      +--src/foo.ts
      |
      |
      +--utils/PROG2
      |
      |
      +--BUILDDIR

and called "../configure" there
it did not work, because PROG1 created

project/
      +--src/foo.ts
             foo.qm

PROG2 expected foo.qm now in BUILDDIR/src and not under project/src/.
(surprisingly it worked when I started make a second time ?!)

I change the rule now to:

%.qm: %.ts
        $(PROG1) $< -qm $@

Now foo.qm is created in  BUILDDIR/src and utils/PROG2 has no problem.

It works but I don't know if it is a good solution.

Thomas

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