[gtk-osx-devel] Building gtk+3 on macOS - libepoxy problem

[Марко М. Костић <marko m kostic gmail com>]

Hi everyone.

First time trying to build gtk+3 on macOS 10.12.1 via jhbuild. I've 
bootstraped jhbuild environment using
the instructions on the page 
https://wiki.gnome.org/Projects/GTK+/OSX/Building.

The building process was something like this:
echo 'export PATH=$PATH:/Users/MYUSERONMACOS/.local/bin' >> ~/.bash_profile
source ~/.bash_profile
curl https://git.gnome.org/browse/gtk-osx/plain/gtk-osx-build-setup.sh 
-o gtk-osx-build-setup.sh
sh ./gtk-osx-build-setup.sh
echo 'build_policy = "updated-deps"' >> ~/.jhbuildrc-custom
jhbuild bootstrap
jhbuild update meta-gtk-osx-bootstrap meta-gtk-osx-core meta-gtk-osx-gtk3
jhbuild build --no-network meta-gtk-osx-bootstrap meta-gtk-osx-core 
meta-gtk-osx-gtk3

Everything was fine and building until jhbuild started building 
libepoxy. It was failing to build due to
undefined symbols. The output follows:

*** Building libepoxy *** [33/43]
make -j 3
/Applications/Xcode.app/Contents/Developer/usr/bin/make  all-recursive
Making all in include/epoxy
make[2]: Nothing to be done for `all'.
Making all in src
cp ./../include/epoxy/config.h.guess ./../include/epoxy/config.h
.././install-sh -c -d ../include/epoxy
  GEN      glx_generated_dispatch.c
  GEN      egl_generated_dispatch.c
  GEN      gl_generated_dispatch.c
  GEN      wgl_generated_dispatch.c
/Applications/Xcode.app/Contents/Developer/usr/bin/make  all-am
  CC       dispatch_common.lo
  CC       gl_generated_dispatch.lo
  CCLD     libepoxy.la
Undefined symbols for architecture x86_64:
  "_epoxy_eglGetCurrentContext", referenced from:
      _epoxy_egl_get_current_gl_context_api in dispatch_common.o
      _epoxy_get_bootstrap_proc_address in dispatch_common.o
  "_epoxy_eglGetCurrentDisplay", referenced from:
      _epoxy_egl_get_current_gl_context_api in dispatch_common.o
      _epoxy_get_bootstrap_proc_address in dispatch_common.o
  "_epoxy_eglGetProcAddress", referenced from:
      _epoxy_get_proc_address in dispatch_common.o
  "_epoxy_eglQueryContext", referenced from:
      _epoxy_egl_get_current_gl_context_api in dispatch_common.o
      _epoxy_get_bootstrap_proc_address in dispatch_common.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [libepoxy.la] Error 1
make[2]: *** [all] Error 2
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
*** Error during phase build of libepoxy: ########## Error running make -j 3  *** [33/43]

I think that the cause of this problem is the usage of clang compilers/linkers (from XCode 8.1) instead
of using gcc for this but I am not sure because I'm new to macOS ecosystem.

Any tips on how to resolve this issue and compile libepoxy sucessfully under macOS 10.12.1?

Thanks in advance.

Marko M. Kostic