Jonathan Nieder wrote on Mon, Nov 07, 2011 at 12:45:19 -0600:
> >>   (swig-pl): Likewise.
> 
> Needed.
> 
>       cd . && /usr/bin/python
>       ../build/generator/swig/checkout_swig_header.py
>       /tmp/svn-test/BUILD/../build.conf /usr/bin/swig common.swg
>       Traceback (most recent call last):
>         File "../build/generator/swig/checkout_swig_header.py", line 85, in 
> <module>
>           gen.checkout(sys.argv[3])
>         File "../build/generator/swig/checkout_swig_header.py", line 62, in 
> checkout
>           open(out, "w")
>       IOError: [Errno 2] No such file or directory: 
> 'subversion/bindings/swig/proxy/common.swg'
> 
> >>   ($(SWIG_PY_DIR)/libsvn): Likewise.
> 
> Needed.
> 
>       mkdir /tmp/svn-test/BUILD/subversion/bindings/swig/python/libsvn
>       mkdir: cannot create directory 
> `/tmp/svn-test/BUILD/subversion/bindings/swig/python/libsvn': No such file or 
> directory
>       make: *** [/tmp/svn-test/BUILD/subversion/bindings/swig/python/libsvn] 
> Error 1
> 

I like your approach :-)

> [[[
> * Makefile.in
>   (swig-pl, $(SWIG_PY_DIR)/libsvn): Depend on mkdir-init.

Does the swig-rb target need to grow a similar dependency on mkdir-init?
Makefile.in doesn't seem to already contain such a dependency.

> @@ -808,9 +809,14 @@ clean-swig-py:
>       fi
>       for d in $(SWIG_PY_DIR) $(SWIG_PY_DIR)/libsvn_swig_py; \
>       do \
> -       cd $$d && rm -rf *.lo *.la *.o *.pyc .libs; \
> +       if test -d $$d; then \
> +         cd $$d && rm -rf *.lo *.la *.o *.pyc .libs; \
> +       fi; \
>       done

Seems to me this could benefit from a subshell --- the 'cd' commands
last until the end of the target's scriptlet, but that isn't terribly
obvious to the reader.  I'll get that done too.

> -     find $(SWIG_PY_SRC_DIR) $(SWIG_PY_DIR) -name "*.pyc" -exec rm {} ';'
> +     find $(SWIG_PY_SRC_DIR) -name "*.pyc" -exec rm {} ';'
> +     if test -d $(SWIG_PY_DIR); then \
> +       find $(SWIG_PY_DIR) -name "*.pyc" -exec rm {} ';'; \
> +     fi
>  
>  extraclean-swig-py: clean-swig-py
>       $(EXTRACLEAN_SWIG_PY)

Committed in r1198883, but I'll revert this shortly because a buildbot broke:
http://ci.apache.org/builders/svn-x64-ubuntu-gcc/builds/3835/steps/Build/logs/stdio

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