build(7): clarify buildenv target can be used for non-cross builds

make buildenv can be used for building for the same architecture as
the host (perhaps this is a degenerate case of cross-building).
TARGET and TARGET_ARCH do not need to be set in this case.

Reviewed by:	bdrewery
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D10759

1 files changed, 5 insertions, 5 deletions

diff --git a/share/man/man7/build.7 b/share/man/man7/build.7
index 4c89b9a9b7c0..54811bf7e46a 100644
--- a/share/man/man7/build.7
+++ b/share/man/man7/build.7
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd August 16, 2018
+.Dd November 10, 2018
 .Dt BUILD 7
 .Os
 .Sh NAME
@@ -168,16 +168,16 @@ are:
 .Bl -tag -width ".Cm distributeworld"
 .It Cm buildenv
 Spawn an interactive shell with environment variables set up for
-cross-building the system.
-The target architecture needs to be specified with
+building the system or individual components.
+For cross-building the target architecture needs to be specified with
 .Xr make 1
 variables
 .Va TARGET_ARCH
 and
 .Va TARGET .
 .Pp
-This target is only useful after a complete cross-toolchain including
-the compiler, linker, assembler, headers and libraries has been
+This target is only useful after a complete toolchain (including
+the compiler, linker, assembler, headers and libraries) has been
 built; see the
 .Cm toolchain
 target below.