RFR: JDK-8138761 Improved handling of libffi, and cleanup of libraries.m4

[Erik Joelsson]

Looks good to me.

/Erik

On 2015-10-02 16:58, Magnus Ihse Bursie wrote:
> To build zero, we need libffi. However, the code in configure to 
> handle libffi is not up to normal library handling standards, so it is 
> not possible to set it using configure arguments.
>
> When trying to rectify this, I finally got tired of the mess that 
> libraries.m4 is. I have split it into parts, where each prominent 
> library gets it's own file, and I've switched the logic on 
> dependencies to be positive (i.e. linux needs alsa, not "macosx does 
> NOT need alsa").
>
> The cleanup includes:
> * Split libraries.m4.
> * Remove builddeps.
> * Remove last references to pulse.
> * Remove HAVE_ALTZONE.
> * Separate handling of bundled libs.
> * Set LIBM properly.
>
> The libffi support means that we now have 
> --with-libffi[-libs/-include], just like for other libraries. Also, we 
> sanity check that we can actually compile with libffi.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8138761
> WebRev: 
> http://cr.openjdk.java.net/~ihse/JDK-8138761-libffi-and-libraries-cleanup/webrev.01
>
> /Magnus