Re: AC_CONFIG_HEADERS & AC_CONFIG_FILES combo

[Sam Steingold]

Sam Steingold wrote:
> I have a header file avcall.h which collects the results of autoconf 
> tests, so it is mentioned in AC_CONFIG_HEADERS.
> I also want it to define the package version cpp macro, so I added
>
> #if !defined(LIBFFCALL_VERSION)
> # define LIBFFCALL_VERSION @PACKAGE_VERSION@
> #endif

I guess I can do this:

#if !defined(LIBFFCALL_VERSION)
# undef PACKAGE_VERSION
# define LIBFFCALL_VERSION PACKAGE_VERSION
#endif

and autoconf will replace it with

#if !defined(LIBFFCALL_VERSION)
# define PACKAGE_VERSION  123
# define LIBFFCALL_VERSION PACKAGE_VERSION
#endif

however, this is not good because the users of this package will have a 
conflict of my PACKAGE_VERSION with their PACKAGE_VERSION from their config.h.
I cannot undef PACKAGE_VERSION in avcall.h because autoconf will replace it 
with "#define PACKAGE_VERSION ...".