[Discuss-gnuradio] build system, generate_all.py doesn't work when building out-of-sourcedir

[Martin Dvh]

Hi all,

I allways build in a subdir of the sourcedir.
svn checkout
cd trunk
./bootstrap
mkdir build
cd build
../configure
make

Usually this works well, but I found out that this doesn't work if you change 
something in the generate*.py scripts.

/gnuradio-core/src/lib/filter/generate_all.py

Is the script run by the makefile in build/gnuradio-core/src/lib/filter to 
generate build/gnuradio-core/src/lib/filter/makefile.gen (amongst
other things)
But the makefile.gen which is included is in gnuradio-core/src/lib/filter  
(note this is in the sourcedir, not the builddir)

So the old makefile.gen is included.

I am not an automake wizard but I wondered if this is solvable.

The only workaround I have is.
first configure and build in the sourcedir. Do a make distclean and then 
configure and build in the builddir.

cd trunk
./configure
make
make clean
make distclean
cd build   (this is my builddir)
../configure
make


Here follows a snippet from gnuradio-core/src/lib/filter/Makefile.am where some 
of this magic happens.

# include $(srcdir)/Makefile.gen
include Makefile.gen


$(GENERATED_H) $(GENERATED_I) $(GENERATED_CC): $(CODE_GENERATOR)
        PYTHONPATH=$(top_srcdir)/gnuradio-core/src/python srcdir=$(srcdir) 
$(PYTHON) $(srcdir)/generate_all.py


BUILT_SOURCES = $(GENERATED_H) $(GENERATED_I) $(GENERATED_CC)

Greetings,
Martin