pkg/44828: databases/mysql51-client expects GNU diff

[joern.clausen%uni-bielefeld.de@localhost]

>Number:         44828
>Category:       pkg
>Synopsis:       databases/mysql51-client expects GNU diff
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Apr 05 11:55:00 +0000 2011
>Originator:     Jörn Clausen
>Release:        
>Organization:
University of Bielefeld
>Environment:
>Description:
Installing databases/mysql51-client on Solaris fails with

+ /bin/diff -I '#include' -w include/mysql/plugin.h.pp ./abi_check.out
/bin/diff: illegal option -- I
usage: diff [-bitw] [-c | -e | -f | -h | -n | -u] file1 file2
       diff [-bitw] [-C number | -U number] file1 file2
       diff [-bitw] [-D string] file1 file2
       diff [-bitw] [-c | -e | -f | -h | -n | -u] [-l] [-r] [-s] [-S name] 
directory1 directory2

-I seems to be a GNU diff feature. Neither adding "gdiff" nor "diff" to 
USE_TOOLS solved the problem (devel/diffutils is installed, using "g" prefix). 
See pkg/44145 for a similar problem.
>How-To-Repeat:

>Fix: