Gtags does not find extern functions in header files (e.g., stdio.h)

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Hello,

I am using Gnu Global 6.6.2 to generate tags from some files in
`/usr/include`. I am also using Universal Ctags as a plugin.

When i try to execute `$ global fprintf`, the stdio.h header file does not
appear.

Here is some information about what I am using:

`$ global --version
global (GNU GLOBAL) 6.6.2
Copyright (c) 1996-2017 Tama Communications Corporation
License GPLv3+: GNU GPL version 3 or later <
http://www.gnu.org/licenses/gpl.html>
This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.`

And Ctags version, for the sake of completeness:

`$ ctags --version
Universal Ctags 0.0.0(f9bbb35e), Copyright (C) 2015 Universal Ctags Team
Universal Ctags is derived from Exuberant Ctags.
Exuberant Ctags 5.8, Copyright (C) 1996-2009 Darren Hiebert
  Compiled: Sep  2 2018, 16:47:42
  URL: https://ctags.io/
  Optional compiled features: +wildcards, +regex, +iconv,
+option-directory, +xpath, +json, +interactive, +sandbox, +yaml`

And some relevant environment variables:

$GTAGSCONF=/usr/share/gtags/gtags.conf
$GTAGSLABEL=new-ctags
$GTAGSLIBPATH=/usr/include

I think this is enough information, I would appreciate some help!

Thank you,
Romeu

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<div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr">Hello,<=
div><br></div><div>I am using Gnu Global 6.6.2 to generate tags from some f=
iles in `/usr/include`. I am also using Universal Ctags as a plugin.</div><=
div><br></div><div>When i try to execute `$ global fprintf`, the stdio.h he=
ader file does not appear.</div><div><br></div><div>Here is some informatio=
n about what I am using:</div><div><br></div><div><div>`$ global --version<=
/div><div>global (GNU GLOBAL) 6.6.2</div><div>Copyright (c) 1996-2017 Tama =
Communications Corporation</div><div>License GPLv3+: GNU GPL version 3 or l=
ater &lt;<a href=3D"http://www.gnu.org/licenses/gpl.html">http://www.gnu.or=
g/licenses/gpl.html</a>&gt;</div><div>This is free software; you are free t=
o change and redistribute it.</div><div>There is NO WARRANTY, to the extent=
 permitted by law.`</div></div><div><br></div><div>And Ctags version, for t=
he sake of completeness:</div><div><br></div><div>`$ ctags --version</div><=
div>Universal Ctags 0.0.0(f9bbb35e), Copyright (C) 2015 Universal Ctags Tea=
m</div><div>Universal Ctags is derived from Exuberant Ctags.</div><div>Exub=
erant Ctags 5.8, Copyright (C) 1996-2009 Darren Hiebert</div><div>=C2=A0 Co=
mpiled: Sep=C2=A0 2 2018, 16:47:42</div><div>=C2=A0 URL: <a href=3D"https:/=
/ctags.io/">https://ctags.io/</a></div><div>=C2=A0 Optional compiled featur=
es: +wildcards, +regex, +iconv, +option-directory, +xpath, +json, +interact=
ive, +sandbox, +yaml`</div><div><br></div><div>And some relevant environmen=
t variables:</div><div><br></div><div><div>$GTAGSCONF=3D/usr/share/gtags/gt=
ags.conf</div><div>$GTAGSLABEL=3Dnew-ctags</div><div>$GTAGSLIBPATH=3D/usr/i=
nclude</div></div><div><br></div><div>I think this is enough information, I=
 would appreciate some help!</div><div><br></div><div>Thank you,</div><div>=
Romeu</div><div><br></div><div><br></div></div></div></div></div>

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