Update CONFIGURE_ARGS for how we pass CONFIGURE_TARGET to configure script.

Specifically, newer autoconf (> 2.13) has different semantic of the
configure target. In short, one should use --build=CONFIGURE_TARGET
instead of CONFIGURE_TARGET directly. Otherwise, you will get a warning
and the old semantic may be removed in later autoconf releases.

To workaround this issue, many ports hack the CONFIGURE_TARGET variable
so that it contains the ``--build='' prefix.

To solve this issue, under the fact that some ports still have
configure script generated by the old autoconf, we use runtime detection
in the do-configure target so that the proper argument can be used.

Changes to Mk/*:
 - Add runtime detection magic in bsd.port.mk
 - Remove CONFIGURE_TARGET hack in various bsd.*.mk
 - USE_GNOME=gnometarget is now an no-op

Changes to individual ports, other than removing the CONFIGURE_TARGET hack:

= pkg-plist changed (due to the ugly CONFIGURE_TARGET prefix in * executables)
  - comms/gnuradio
  - science/abinit
  - science/elmer-fem
  - science/elmer-matc
  - science/elmer-meshgen2d
  - science/elmerfront
  - science/elmerpost

= use x86_64 as ARCH
  - devel/g-wrap

= other changes
  - print/magicfilter
    GNU_CONFIGURE -> HAS_CONFIGURE since it's not generated by autoconf

Total # of ports modified:  1,027
Total # of ports affected: ~7,000 (set GNU_CONFIGURE to yes)

PR:		126524 (obsoletes 52917)
Submitted by:	rafan
Tested on:	two pointyhat 7-amd64 exp runs (by pav)
Approved by:	portmgr (pav)

7 files changed, 0 insertions, 8 deletions

diff --git a/converters/ascii2binary/Makefile b/converters/ascii2binary/Makefile
index 250ea8f5b56..cec842dc0bd 100644
--- a/converters/ascii2binary/Makefile
+++ b/converters/ascii2binary/Makefile
@@ -18,7 +18,6 @@ USE_BZIP2=	yes
 USE_GETTEXT=	yes
 
 GNU_CONFIGURE=	yes
-CONFIGURE_TARGET=	--build=${MACHINE_ARCH}-portbld-freebsd${OSREL}
 CONFIGURE_ENV=	CPPFLAGS=-I${LOCALBASE}/include LDFLAGS=-L${LOCALBASE}/lib
 WRKSRC=		${WRKDIR}/${PORTNAME}-${PORTVERSION}
 
diff --git a/converters/enca/Makefile b/converters/enca/Makefile
index 7156982a609..20169f7d9b6 100644
--- a/converters/enca/Makefile
+++ b/converters/enca/Makefile
@@ -24,7 +24,6 @@ USE_LDCONFIG=	yes
 CONFIGURE_ARGS=	--with-html-dir=${DOCSDIR} \
 		--without-librecode \
 		--with-libiconv=${LOCALBASE}
-CONFIGURE_TARGET=	--build=${MACHINE_ARCH}-portbld-freebsd${OSREL}
 CONFIGURE_ENV=	CPPFLAGS=-I${LOCALBASE}/include \
 		LDFLAGS=-L${LOCALBASE}/lib
 
diff --git a/converters/fix-mime-charset/Makefile b/converters/fix-mime-charset/Makefile
index 5f120415758..e0da2a7b743 100644
--- a/converters/fix-mime-charset/Makefile
+++ b/converters/fix-mime-charset/Makefile
@@ -22,7 +22,6 @@ PORTDOCS=	README.koi8r README
 GNU_CONFIGURE=	yes
 USE_PERL5_BUILD=	yes
 
-CONFIGURE_TARGET=	--build=${MACHINE_ARCH}-portbld-freebsd${OSREL}
 CONFIGURE_ENV=	CPPFLAGS="${CPPFLAGS} -I${LOCALBASE}/include" \
 		LIBS="-L${LOCALBASE}/lib"
 
diff --git a/converters/psiconv/Makefile b/converters/psiconv/Makefile
index 1628b8d947e..54b243c8c4e 100644
--- a/converters/psiconv/Makefile
+++ b/converters/psiconv/Makefile
@@ -19,7 +19,6 @@ USE_LDCONFIG=	yes
 USE_GMAKE=	yes
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--with-imagemagick=no
-CONFIGURE_TARGET=	--target=${MACHINE_ARCH}-unknown-freebsd${OSREL}
 
 MAN1=		psiconv.1 psiconv-config.1
 
diff --git a/converters/shftool/Makefile b/converters/shftool/Makefile
index 75e85f6b485..3c0d2c78bd5 100644
--- a/converters/shftool/Makefile
+++ b/converters/shftool/Makefile
@@ -17,7 +17,6 @@ COMMENT=	Converter for the Standard Hex Format (SHF)
 LIB_DEPENDS=	expat.6:${PORTSDIR}/textproc/expat2
 
 GNU_CONFIGURE=	yes
-CONFIGURE_TARGET=	--build=${MACHINE_ARCH}-portbld-freebsd${OSREL}
 
 post-patch:
 	${REINPLACE_CMD} -e 's,^LIBLOC_LIST=.*,LIBLOC_LIST=${LOCALBASE},' \
diff --git a/converters/tnef/Makefile b/converters/tnef/Makefile
index 8eb364c53ed..c3a7b0b8ecf 100644
--- a/converters/tnef/Makefile
+++ b/converters/tnef/Makefile
@@ -15,7 +15,6 @@ MAINTAINER=	garga@FreeBSD.org
 COMMENT=	Unpack data in MS Outlook TNEF format
 
 GNU_CONFIGURE=		yes
-CONFIGURE_TARGET=	--build=${MACHINE_ARCH}-portbld-freebsd${OSREL}
 
 MAN1=		tnef.1
 PORTDOCS=	AUTHORS NEWS README THANKS TODO
diff --git a/converters/ytnef/Makefile b/converters/ytnef/Makefile
index b6689cec444..48ed5b2ace4 100644
--- a/converters/ytnef/Makefile
+++ b/converters/ytnef/Makefile
@@ -25,8 +25,6 @@ CFLAGS+=	-I${LOCALBASE}/include
 LDFLAGS+=	-L${LOCALBASE}/lib
 CONFIGURE_ENV+=	LDFLAGS="${LDFLAGS}"
 
-CONFIGURE_TARGET=	--build=${MACHINE_ARCH}-portbld-freebsd${OSREL}
-
 PLIST_FILES=	bin/ytnef bin/ytnefprocess.pl bin/ytnefprint
 PORTDOCS=	AUTHORS NEWS README