The gcc compiler optimization to replace a call of malloc followed by a
call of memset with a calloc call conflicts with tcshs own
implementation of calloc, which calls malloc and memset.

This bug is reported to and acknowledged by the maintainer (
http://mx.gw.com/pipermail/tcsh-bugs/2015-May/000930.html ) and should
be fixed in the next tcsh release.

The build script incorrectly installed the csh symlink into $BEE_BINDIR,
which is the bin directory of the "bee" command instead of into $BINDIR
which is the bin directory of the package. Usually this is the same.

This avoids a fork an a chdir.

Due to an incompatible compiler optimization, 6.19.00-0 is unusable.
This revision contains a fix ( -fno-optimize-strlen ). See related
commit.