Nonstandard dependency installation directories

Hi,

I'm trying to compile GraphicsMagick where the dependencies are not
installed into a standard directory that `configure' would find. The
UNIX README[1] tells me:

> Configure can usually find the X include and library files
> automatically, but if it doesn't, you can use the 'configure' options
> '--x-includes=DIR' and '--x-libraries=DIR' to specify their locations.

However, the `configure' script tells me that this is wrong. If I
replace the placeholder "X" with "png" for example:

    $ ./configure --disable-shared --enable-static \
      --with-png-libraries=$PWD/../../root/lib \
      --with-png-includes=$PWD/../../root/include
    configure: WARNING: unrecognized options: --with-png-libraries,
    --with-png-includes
    [...]

As a consequence, it does not find libpng. Note I only use
libpng as an example, I have all of GraphicsMagick's dependencies in
that directory.

I downloaded the 1.3.26 source tarball of GraphicsMagick, which is the
current stable release. I run this on MSYS2, but according to the
installation instructions this means I should follow the UNIX
installation instructs (which is probably correct, since all projects
say so for MinGW-based build environments). I expect the same problem to
happen on any Unix system.

So, the documentation is incorrect. What's the correct way to specify a
nonstandard library and include directory for GraphicsMagick's
dependencies?

Greetings
Marvin

[1]: http://www.graphicsmagick.org/INSTALL-unix.html

-- 
Blog: https://www.guelkerdev.de
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