Re: [Qemu-devel] [PATCH] configure: For libgcrypt if pkg-config is available use it

[Daniel P. Berrange]

On Thu, Jan 05, 2017 at 12:56:52AM +1000, Nathan Rossi wrote:
> If libgcrypt info is available with pkg-config use it over using the
> libgcrypt-config. pkg-config is preferred due to is compatibility with
> cross-compilation (where you cannot execute the targets version of
> libgcrypt-config).

It can be made to work, but you need to modify $PATH to ensure it finds
the build target libgcrypt-config first.

eg on Fedora you'd do this with mingw32

   PATH=/usr/i686-w64-mingw32/sys-root/mingw/bin:$PATH ./configure ...

> This change makes configure check for libgcrypt in pkg-config first,
> then falling back to use libgcrypt-config if available. This follows a
> similar process to how libsdl is handled.

AFAIK, no version of libgcrypt has ever shipped a pkg-config file. Their
maintainers have explicitly rejected patches adding that, ironically
because they claim pkg-config doesn't handle cross-compilation and
libgcrypt-config does :-)

https://lists.gnupg.org/pipermail/gcrypt-devel/2007-February/001109.html
https://lists.gnupg.org/pipermail/gcrypt-devel/2015-September/003569.html


So overall, I don't think this patch is needed/desirable for QEMU.

Regards,
Daniel
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