update docs for --arch and --target.

2 files changed, 6 insertions, 3 deletions

diff --git a/docs/mock.1 b/docs/mock.1
index a71c8c8..9bcc94a 100644
--- a/docs/mock.1
+++ b/docs/mock.1
@@ -61,8 +61,11 @@ Clean chroot after building. Use with \-\-resultdir. Only active for '\-\-rebuil
 \fB\-\-no\-cleanup\-after\fR
 Don't clean chroot after building. If automatic cleanup is enabled, use this to disable.
 .TP
-\fB\-\-target=\fR\fIARCH\fP, \fB\-\-arch=\fR\fIARCH\fP
-Specify target build arch.
+\fB\-\-target=\fR\fIARCH\fP
+This argument is passed to rpmbuild to specify the target arch to build. It defaults to whatever is specified for --arch, or whatever is specified in the config file as config_opts['target_arch'].
+.TP
+\fB\-\-arch=\fR\fIARCH\fP
+Calls the linux personality() syscall to tell the kernel to emulate a secondary architecture. For example, building i386 packages on an x86_64 buildhost.
 .TP
 \fB\-D \fR"\fIMACRO EXPR\fP", \fB\-\-define=\fR"\fIMACRO EXPR\fP"
 Specify macro definitions used for the build.  This option may be used multiple times, just as the rpmbuild \-\-define option can be.  For example:
diff --git a/py/mock.py b/py/mock.py
index e3ec21a..bf0d616 100755
--- a/py/mock.py
+++ b/py/mock.py
@@ -125,7 +125,7 @@ def command_parse(config_opts):
                       help="Dont clean chroot after building. If automatic"
                            " cleanup is enabled, use this to disable.", )
     parser.add_option("--arch", action ="store", dest="arch",
-                      default=None, help="Use to set kernel personality() to use to build.")
+                      default=None, help="Sets kernel personality().")
     parser.add_option("--target", action ="store", dest="rpmbuild_arch",
                       default=None, help="passed to rpmbuild as --target")
     parser.add_option("-D", "--define", action="append", dest="rpmmacros",