New USES imake to handle the dependency on imake.

This uses accept 'env' as an argument for ports that do use their own or a different do-configure target.

Modify xmkmf so it accept IMAKECPPFLAGS as default flags for imake and pass it to the called imake.
Modify xorg-cf-files (the FreeBSD.cf configuration file) to allow CppCmd to be overwritten.
Pass CppCmd CcCmd and CplusplusCmd via command line to each call of imake via IMAKECPPFLAGS
Pass IMAKE_DEFINE with the above arguments to MAKE_ARGS so that imake spawned from Makefile generated by a previous
imake also inherit the defined CppCmd CcCmd and CplusplusCmd.
Make imake use devel/tradcpp all the time, so that when buidling with clang we do not depend on gcc's cpp.
Make imake respect CC and CXX
Make imake respect USE_GCC (if set imake will use gcc's cpp).

While here:
- Remove a couple of indefinite articles from comments
- Trim headers
- Fix a couple of ports to build with clang or use: USE_GCC=any
- Fix a now useless redefinition of the extraction chain
- Fix a typo in japanese/Wnn7-lib bundled imake template definitions
- Fix some XMKMF execution with no env specified
- Use options helper in x11/xautolock to simplify the port

1 files changed, 1 insertions, 2 deletions

diff --git a/x11-clocks/mouseclock/Makefile b/x11-clocks/mouseclock/Makefile
index cd45b20..416880f 100644
--- a/x11-clocks/mouseclock/Makefile
+++ b/x11-clocks/mouseclock/Makefile
@@ -11,10 +11,9 @@ MASTER_SITE_SUBDIR=	X11/clocks
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Display the current time using the X root cursor
 
+USES=		imake
 USE_GMAKE=	yes
-USE_IMAKE=	yes
 USE_XORG=	x11 xext
-XMKMF=		xmkmf
 NO_INSTALL_MANPAGES=	yes
 
 post-configure: