I am a very sad panda right now. I need some help with mkmf.rb.
I have a header file “foo.h” that is in /usr/include.
I have a list of other directories where a newer version of foo.h might
live. For example, it is possible that I have a newer version of foo.h
installed in either /opt/local/include, /usr/local/include, or some
other
directory.
Is there a way with mkmf to detect the newer version of foo.h under one
of the directories in my list?
I’m using find_header(), and the first thing it tries is compiling with
no extra gcc flags. Since foo.h was already under /usr/include,
find_header() returns true and does not modify the include paths even
though I’ve told it to search other directories.
On top of that, even if I gave gcc a specific -I flag, it will still
return true because the header file is in /usr/include.
What is the “best” way to solve the problem? I’m tempted to just try
File.exists? for the header file under each possible include directory,
then mucking with the -I flags myself.
Thanks!