This is patch-ac in pkgsrc (== is non-POSIX). Please apply to CVS. (And if cvs isn't the official repo, please explain that...)
Index: configure.ac
===================================================================
RCS file: /coda-src/coda/configure.ac,v
retrieving revision 1.27
diff -u -p -r1.27 configure.ac
--- configure.ac 10 Feb 2012 15:52:54 -0000 1.27
+++ configure.ac 1 Mar 2012 00:58:07 -0000
@@ -142,7 +142,7 @@ AC_SUBST(shortsys)
dnl Build conditionals
if test "$buildvcodacon" != no ; then
test -z "${FLUID}" && AC_MSG_ERROR("Unable to find fltk-fluid")
- test "$coda_cv_path_fltk" == none && AC_MSG_ERROR("Unable to find libfltk")
+ test "$coda_cv_path_fltk" = none && AC_MSG_ERROR("Unable to find libfltk")
fi
AM_CONDITIONAL(BUILD_VCODACON, [test "$buildvcodacon" != no])
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