includedir

[Anthony Green]

Marijn Schouten (hkBst) wrote:
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> Hi list,
>
> I was wondering why libffi doesn't install ffi.h and ffitarget.h in a place that
> can be configured to be /usr/include. Instead it uses
> $(libdir)/@PACKAGE_NAME@-@PACKAGE_VERSION@/include.
>   
This is because the header files are currently ABI dependent, and some 
systems support multiple ABIs.  On Linux there are standards for 
installing libraries in ABI-dependent locations (like /usr/lib vs 
/usr/lib64), but not so much for header files.

Use pkg-config to find the header files like so...

$ pkg-config --cflags libffi
-I/usr/lib/libffi-3.0.1/include

$ gcc -c `pkg-config --cflags libffi` mycode.c

This should always work.

AG


> Marijn
>
> - --
> Marijn Schouten (hkBst), Gentoo Lisp project, Gentoo ML
> <http://www.gentoo.org/proj/en/lisp/>, #gentoo-{lisp,ml} on FreeNode
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