Re: performing pre-build shell commands with automake

[John Calcote]

Wes,

On 6/20/2010 2:14 PM, Wesley Smith wrote:
> How does one do this kind of thing when the source file is specified
> in a subfolder?
> INCLUDES = -I/usr/include/lua5.1 -I/usr/include/cairo
> -I/usr/include/directfb -I/usr/include/freetype2
>
> lib_LTLIBRARIES = cairo.la
> cairo_la_LDFLAGS = -module -avoid-version
> cairo_la_LIBADD = -llua5.1 -L/usr/lib -lcairo -L/usr/lib -ldirectfb
> -L/usr/lib -lfreetype -L/usr/lib
> cairo_la_SOURCES = src/lcairo.c
>
> resource.qt:
>       touch TESTING
>
> lcairo.o: resource.qt
>
>
>
> lcairo.o never gets triggered here.  If I explicitly do make lcairo.o
> then it will get triggered, but I'm not sure from scanning the
> Makefile and Makefile.in how it would get implicitly triggered.
>   

Build once without your qt dependencies in place and carefully note the
name and relative location of the object file generated from
src/lcairo.c. The qt dependency rule will have to look like this:

exact-name-and-relative-location-of-object : resource.qt

This is the short answer. You might also want to use the $(OBJEXT) macro
for the extension on the object file for portability's sake:

.../lcairo.$(OBJEXT) : resource.qt

This is why most people just use BUILT_SOURCES - it's cheating but it
works for most cases. (See section 9.5 of the Automake manual for more
info on BUILT_SOURCES).

John