[Mingw-cross-env-list] Proposal: libgnurx.mk and file.mk

[Moritz Bunkus]

Hey,

I need libmagic.a for my project, MKVToolNix. libmagic.a is part of the 
'file' utility package. This in turn needs libgnurx, a somewhat evolved 
version of libregex.a (see 
http://ftp.gnome.org/pub/gnome/binaries/win32/dependencies/regex.README 
for that sad story).

Here are two build files for the two packages. Both need patches, but 
for different reasons. Compilation & dependencies have been tested 
against a minimal environment.

1. libgnurx:

libgnurx's upstream is set up to be built into DLLs only. No way to 
build it statically without patching it. Therefore the patch simply adds 
its own Makefile.mingw-cross-env and builds the static library itself 
(easy enough, it's only a single source file). This Makefile also takes 
care of installing only the static version.

2. file/magic:

In order to build libmagic an executable of 'file' is needed that can 
be run on the building machine (necessary for generation of the 
magic.mgc file). This requires that the version of the 'file' executable 
matches the version of the library we're trying to build.

Therefore file.mk first builds a non-cross compiled version of 'file' 
and saves it. Then it re-runs configure with --host set and compiles & 
installs the whole package.

The patch is needed for two reasons: First, magic/Makefile.am has to 
use the locally built 'file' executable. Second, configure seems not to 
think that it's being cross-compiled for some reason. Therefore I had to 
hardcode this in magic/Makefile.am as well.

Kind regards,
mosu

file.mk
Description: Text document

file-1-fix-cross-compilation-detection.patch
Description: Text document

libgnurx.mk
Description: Text document

libgnurx-1-build-static-lib.patch
Description: Text document