[Bug 790046] Re: cgraph.h includes cdt.h as <cdt.h>, shoudl it not be "cdt.h" or <graphviz/cdt.h>?

[John Ellson]

I don't consider myself an expert on setting up headers correctly for C
programming, but my expectation here was that downstream users of
installed graphviz libraries would use the pkg-config mechanism:

   pkg-config --cflags libcgraph

should produce the correct -I paths for your installation.

BTW graphviz-2.20 is old.   graphviz-2.28 is available now from
http://www.graphviz.org/

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https://bugs.launchpad.net/bugs/790046

Title:
  cgraph.h includes cdt.h as <cdt.h>, shoudl it not be "cdt.h" or
  <graphviz/cdt.h>?

Status in “graphviz” package in Ubuntu:
  New

Bug description:
  Binary package hint: libgraphviz-dev

  Hi guys,
  Please, explain if this is not a bug. The file /usr/include/graphviz/cgraph.h contains the following line:
  #include                <cdt.h>
  When I try to compile anything that includes this file (cgraph.h), gives me an error. For example
  // start file test.c
  #include <graphviz/cdt.h>
  #include <graphviz/cgraph.h>
  // end file test.c
  Compile as:
  gcc -lcgraph testcgraph.c 
  In file included from testcgraph.c:2:
  /usr/include/graphviz/cgraph.h:20:18: error: cdt.h: No such file or directory

  Should not the include line be changed to <graphviz/cdt.h> or "cdt.h",
  which would not have this problem?

  Pertaining information:
  libgraphviz-dev:
    Installed: 2.20.2-8ubuntu3
    Candidate: 2.20.2-8ubuntu3
    Version table:
   *** 2.20.2-8ubuntu3 0
          500 http://ubuntu.cs.unm.edu/ubuntu/ lucid/main Packages
          100 /var/lib/dpkg/status

  
  Description:	Ubuntu 10.04.1 LTS
  Release:	10.04