On 04/23/2014 04:49 PM, Ludovic Courtès wrote: > I’m looking at an instance of the same problem: Guile comes with a > binary called ‘guild’ that calls out to the ‘guile’ program. > > The approach I implemented some time ago (and which, ahem, happens to be > broken because of this very issue) is: > > 1. ‘configure’ (erroneously) computes the transformed ‘guile’ program > name and substitutes it; > http://git.savannah.gnu.org/cgit/guile.git/tree/configure.ac#n1606 > > 2. ‘guild.in’ uses that value. > http://git.savannah.gnu.org/cgit/guile.git/tree/meta/guild.in#n5 I don't see an AC_CONFIG_FILES() in configure.ac that tries to create guild solely at configure time. Therefore, I assume it's being created at make time - but which Makefile.am is responsible for creating it? _That_ rule would be the place to run $program_transform_name as part of the creation process, rather than trying to shoehorn the conversion into configure.ac. >> Off-hand, I _think_ what you want is something that mirrors what the >> gnulib 'configmake' module is able to do - it propagates the value of >> ${srcdir} and friends into a "configmake.h" header created at make time, >> which is then compiled into the C code so that the program can learn the >> values that were chosen at configure-time and/or overridden at make >> time. It sounds like exposing the transformed program name via a make >> rule that runs $program_transform_name and feeds the .h file for use by >> the rest of the program would give your C code introspective access into >> the transformed name it will be installed as. > > Doesn’t seem easily transposed to the situation above. Still seems like the right way to go. Observe how the automake project does things. First, it sets up a convenience macro for building a file with make-time substitution by using config.status for the easy conversions that configure.ac could provide and make syntax for the remaining conversions: http://git.savannah.gnu.org/cgit/automake.git/tree/Makefile.am#n41 then uses that macro in several other locations: http://git.savannah.gnu.org/cgit/automake.git/tree/bin/Makefile.inc#n57 http://git.savannah.gnu.org/cgit/automake.git/tree/lib/Automake/Makefile.inc#n48 >> But your problem statement didn't give me many details to know if I'm >> on the right track for solving the actual problem you are facing. > > Sorry about that, I hope it’s clearer now. Yep, and I hope my ideas have been helpful in return. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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