[Bug 197561] security/krb5: Due to use of -Werror, krb5 does not build with gcc-5

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197561

            Bug ID: 197561
           Summary: security/krb5: Due to use of -Werror, krb5 does not
                    build with gcc-5
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: cy at FreeBSD.org
          Reporter: marino at FreeBSD.org
          Assignee: cy at FreeBSD.org
             Flags: maintainer-feedback?(cy at FreeBSD.org)

GCC 5, like each release of GCC, comes with new error detections and warnings. 
This is exactly why building ports with -Werror is heavily discourages (in fact
there is a standard blanket to remove these when found).

In the case of krb5, it fails here:


cc_file.c: In function 'fcc_next_cred':
cc_file.c:368:9: error: 'maxsize' may be used uninitialized in this function
[-Werror=maybe-uninitialized]
     ret = load_data(context, id, maxsize, buf);
         ^
cc_file.c:1091:12: note: 'maxsize' was declared here
     size_t maxsize;
            ^
cc_file.c: In function 'read_principal':
cc_file.c:414:9: error: 'maxsize' may be used uninitialized in this function
[-Werror=maybe-uninitialized]
     ret = load_principal(context, id, maxsize, &buf);
         ^
cc1: some warnings being treated as errors
Makefile:779: recipe for target 'cc_file.so' failed
gmake[4]: *** [cc_file.so] Error 1
gmake[4]: Leaving directory
'/wrkdirs/security/krb5/work/krb5-1.13/src/lib/krb5/ccache'
Makefile:1107: recipe for target 'all-recurse' failed
gmake[3]: *** [all-recurse] Error 1
gmake[3]: Leaving directory
'/wrkdirs/security/krb5/work/krb5-1.13/src/lib/krb5'
Makefile:951: recipe for target 'all-recurse' failed
gmake[2]: *** [all-recurse] Error 1
gmake[2]: Leaving directory '/wrkdirs/security/krb5/work/krb5-1.13/src/lib'
Makefile:1526: recipe for target 'all-recurse' failed
gmake[1]: *** [all-recurse] Error 1
gmake[1]: Leaving directory '/wrkdirs/security/krb5/work/krb5-1.13/src'
===> Compilation failed unexpectedly.
Try to set MAKE_JOBS_UNSAFE=yes and rebuild before reporting the failure to
the maintainer.
*** Error code 1

Stop.
make: stopped in /usr/ports/security/krb5
=> Cleaning up wrkdir
===>  Cleaning for krb5-1.13_1



At least 103 other ports depend on krb5 directly or indirectly on DragonFly
(there's no kerberos in base)


proposed fix:
1) just remove -Werror from cflags
2) resolved the warning above.

--- Comment #1 from Bugzilla Automation <bugzilla at FreeBSD.org> ---
Auto-assigned to maintainer cy at FreeBSD.org

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