Source files generation

[Thomas Degris]

Hello,

I am trying to build a libtool library that is build from a bunch of 
generated source files (with a .cxx extension) and a bunch of 
distributed source files (with a .cpp extension). Until now, I have 
added only one of the generated cxx files in the BUILD_SOURCE so the cxx 
files were first generated and then compiled. All the cxx files are 
generated from only one file (with a .stc extension) and one command 
(called for example gencxx). So, until now I am using this kind of 
Makefile.am :

lib_LTLIBRARIES = libtoto.la

BUILD_SOURCE = src/toto01.cxx

dist_libtoto_la_SOURCES = src/toto.stc
libtoto_la_SOURCES =src/toto01.cxx src/toto02.cxx src/toto.cpp

src/toto01.cxx: src/toto.stc
   gencxx src/toto.stc

The problem with this approach is it is not robust with parallel 
compilation and it is not possible to build only one *.lo file from 
clean source if it is not the one used with the BUILD_SOURCE variable. 
To get all of this features, I want to use a general rule to generate a 
.cxx file depending only on one generated file (called diary.xml and 
also generated by the gencxx file) and then writing a rule to build this 
generated file. So, the Makefile.am would be:

lib_LTLIBRARIES = libtoto.la

dist_libtoto_la_SOURCES = src/toto.stc
libtoto_la_SOURCES =src/toto01.cxx src/toto02.cxx src/toto.cpp

%.cxx: src/diary.xml

src/diary.xml: src/toto.stc
   gencxx src/toto.stc

The problem with this approach is that make returns the error :
*** No rule to make target 'src/toto01.cxx', needed by 
'libtoto_la-toto01.lo'. Stop.
So, I guess the pattern %.cxx is not correct but I tried different 
things and I can't make it work. Any ideas ?

Thanks,

Thomas