Re: Failed to build package libpng while building mxe-octave natively

[Michael Goffioul]

On Sat, Jun 29, 2013 at 7:06 PM, Anirudha Bose <address@hidden> wrote:

On Sun, Jun 30, 2013 at 12:27 AM, Michael Goffioul <address@hidden> wrote:

---------- Forwarded message ----------
From: Michael Goffioul <address@hidden>
Date: Sat, Jun 29, 2013 at 2:57 PM
Subject: Re: Failed to build package libpng while building mxe-octave natively
To: Anirudha Bose <address@hidden>

On Sat, Jun 29, 2013 at 1:57 PM, Anirudha Bose <address@hidden> wrote:

I got this error while trying  to build libpng in MinGW. 

In file included from pngpriv.h:129:0,

                 from png.c:14:

pngstruct.h:27:18: fatal error: zlib.h: No such file or directory

compilation terminated.

make[2]: *** [libpng15_la-png.lo] Error 1

make[2]: Leaving directory `/home/ani/mxe-octave/tmp-libpng/libpng-1.5.13'

make[1]: *** [build-only-libpng] Error 2

make[1]: Leaving directory `/home/ani/mxe-octave'

I do have zlib installed on my system. Anyone else encountered this error?

I think it's my fault. Does this change solve the problem for you?

http://hg.octave.org/mxe-octave/rev/98e1ed7ae70b

Yes it does. The package builds fine now. However I do suspect that the actual reason might be because of the missing line

     C:\MinGW\   /usr/local

in my fstab file inside /etc (C:\MinGW\msys\1.0\etc) directory. 

It is possible that libpng didn't find the installed libraries because of the incorrect configuration.

The problem was that, because of my previous change, zlib headers and .pc file didn't get installed anymore. AFAIK the MinGW directory will be mounted automatically by MSYS at /mingw (that's how it works on my installation).

Michael.