gtk-doc doesn't work with cmake

[Fahad]

I am using docker & ubuntu 16.04 and I got this error:

Scanning dependencies of target doc-raqm

[ 30%] Generating raqm/html_dir.stamp, raqm/html

[ 40%] Generating raqm/dir.stamp, raqm

[ 50%] Generating raqm/raqm-decl-list.txt, raqm/raqm-decl.txt, raqm/raqm-overrides.txt, raqm/raqm-sections.txt, raqm/raqm.types

/bin/sh: 1: /bin/gtkdoc-scan: not found

make[2]: *** [raqm/raqm-decl-list.txt] Error 127

CMakeFiles/doc-raqm.dir/build.make:92: recipe for target 'raqm/raqm-decl-list.txt' failed

CMakeFiles/Makefile2:104: recipe for target 'CMakeFiles/doc-raqm.dir/all' failed

make[1]: *** [CMakeFiles/doc-raqm.dir/all] Error 2

BTW, I test it with Fedora 25 and works fine but I need to get work under ubuntu for travis-ci.com
My cmake file here: https://github.com/Fahad-Alsaidi/libraqm/blob/cmake/CMakeLists.txt#L254

I report this bug for upstream but got closed as "RESOLVED NOTGNOME "
: https://bugzilla.gnome.org/show_bug.cgi?id=776205

[Fahad (fahad-alsaidi)]

I do this workaround to get things work:

 ln -s /usr/bin/gtkdoc-scan /bin/
 ln -s /usr/bin/gtkdoc-fixxref /bin/
 ln -s /usr/bin/gtkdoc-scangobj /bin/
 ln -s /usr/bin/gtkdoc-mkhtml /bin/
 ln -s /usr/bin/gtkdoc-mkdb /bin/

[Bruce Mitchener (bruce-mitchener)]

The patch on https://bugzilla.gnome.org/show_bug.cgi?id=792148 should fix this issue.