[Gimp-developer] Trouble building Gimp from GIT repo

["Steven P. Ulrick" <meow8282 gmail com>]

Hello, Everyone

This is on Fedora 27, all current updates installed.

I have obtained the source code for GIMP using the following command 
"git clone https://github.com/GNOME/gimp.git";

When I attempt to build GIMP using the following command: "./autogen.sh 
&& ./configure --enable-gtk-doc --enable-gtk-doc-html 
--prefix=/usr/local/spu/assorted/g/gimp/gimp-$(xdate) && make"

the result is as follows:

  - Error: missing dependency babl >= 0.1.42
  - Error: missing dependency gegl-0.3 >= 0.3.29
  - Error: missing dependency libmypaint >= 1.3.0
  - Error: missing dependency mypaint-brushes-1.0

OK, the Fedora 27 versions of Babl & Gegl are too low. So I proceed to 
install them from their respective GIT repo's, to a location outside of 
the path that Fedora 27 installs in.  I then put this location in my 
~/.bash_profile and then GIMP correctly sees them, and those two missing 
dependencies go away...

I also have libmypaint installed from GIT. It's "libmypaint-2.0.pc" file 
says the following:

Version: 2.0.0

"rpm -qa | grep -i mypaint" says the following:

[steve@afolkey2 ~]$ rpm -qa | grep -i mypaint
mypaint-data-1.2.1-10.fc27.noarch
mypaint-1.2.1-10.fc27.x86_64
mypaint-devel-1.2.1-10.fc27.x86_64

So, "mypaint-data" (which contains the brushes that constitute 
mypaint-brushes) is a good version.
My custom install of libmypaint is newer than required, but is not 
detected as such by GIMP.
My custom installs of BABL and GEGL are both accepted versions, and they 
ARE detected by GIMP.

If I run "./autogen.sh && ./configure --enable-gtk-doc 
--enable-gtk-doc-html 
--prefix=/usr/local/spu/assorted/g/gimp/gimp-$(xdate) && make" with all 
of the variables for the above listed items set appropriately in 
.bash_profile, the result is this:
Error: GIMP configuration failed.

  - Error: missing dependency libmypaint >= 1.3.0
  - Error: missing dependency mypaint-brushes-1.0

See the file 'INSTALL' for more help.
make: *** No targets specified and no makefile found.  Stop.

So, I THINK I have everything installed that GIMP requires, in the right 
versions, but still no success.

I will glady provide any additional information that you need.

Thank you,
Steven P. Ulrick