cd /usr/src/sbin/growfs
make -DGFSDBG
Returns errors while building.

Probably because the debug code is normally execluded.

2* int versus u_int_32
2* char-pointer cast to uint-pointer

First is fixed by changing type
Second is fixed by getting the compiler to ignore the warning.
Which IMHO is valid since compiling GFSDBG is only done if you sort of know what is going on.....

Perhaps a suggestion on debugging on the manual page would be approriate as well.

Tested on 10.1, but probably valid on others as well.

svn diff:
Index: sbin/growfs/Makefile
===================================================================
--- sbin/growfs/Makefile        (revision 281869)
+++ sbin/growfs/Makefile        (working copy)
@@ -17,6 +17,8 @@

 .if defined(GFSDBG)
 SRCS+=  debug.c
+CFLAGS+=-DFS_DEBUG
+NO_WCAST_ALIGN= yes
 .endif

 DPADD= ${LIBUTIL}
Index: sbin/growfs/growfs.c
===================================================================
--- sbin/growfs/growfs.c        (revision 281869)
+++ sbin/growfs/growfs.c        (working copy)
@@ -161,7 +161,7 @@
 #ifdef FS_DEBUG
        {
                struct csum *dbg_csp;
-               int dbg_csc;
+               u_int32_t dbg_csc;
                char dbg_line[80];

                dbg_csp = fscs;
@@ -242,7 +242,7 @@
 #ifdef FS_DEBUG
        {
                struct csum     *dbg_csp;
-               int     dbg_csc;
+               u_int32_t       dbg_csc;
                char    dbg_line[80];

                dbg_csp = fscs;