Add a first stab at building racket

disabled-packages/racket/build.sh

@@ -1,13 +1,31 @@
 TERMUX_PKG_HOMEPAGE=https://racket-lang.org
 TERMUX_PKG_DESCRIPTION="Full-spectrum programming language going beyond Lisp and Scheme"
-TERMUX_PKG_VERSION=6.3
-TERMUX_PKG_SRCURL=https://mirror.racket-lang.org/releases/6.3/installers/racket-minimal-${TERMUX_PKG_VERSION}-src-builtpkgs.tgz
-TERMUX_PKG_DEPENDS="libffi, libandroid-support"
-# TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--with-ssl=openssl --disable-iri"
-# TERMUX_PKG_HOSTBUILD=true
+TERMUX_PKG_VERSION=6.4
+TERMUX_PKG_SRCURL=https://mirror.racket-lang.org/installers/${TERMUX_PKG_VERSION}/racket-minimal-${TERMUX_PKG_VERSION}-src-builtpkgs.tgz
 TERMUX_PKG_FOLDERNAME=racket-${TERMUX_PKG_VERSION}
-TERMUX_MAKE_PROCESSES=1
+TERMUX_PKG_HOSTBUILD=true
+TERMUX_PKG_DEPENDS="libffi, libandroid-support"
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--enable-racket=$TERMUX_PKG_HOSTBUILD_DIR/racket/racketcgc"
+# Building racket hits the 'the wrong gcc-problem' detailed at http://www.metastatic.org/text/libtool.html
+# due to --tag=CC being used. To avoid that a cross libtool built in termux_step_post_extract_package()
+# below and used due to this configure argument:
+_CROSS_LIBTOOL_DIR=$TERMUX_PKG_CACHEDIR/libtool-cross-2.4.6-${TERMUX_HOST_PLATFORM}
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" --enable-lt=$_CROSS_LIBTOOL_DIR/bin/${TERMUX_HOST_PLATFORM}-libtool"
+
+LDFLAGS+=" -llog"
 
 termux_step_post_extract_package () {
+	if [ ! -d $_CROSS_LIBTOOL_DIR ]; then
+		LIBTOOL_TARFILE=$TERMUX_PKG_CACHEDIR/libtool-2.4.6.tar.gz
+		if [ ! -f $LIBTOOL_TARFILE ]; then
+			curl -L -o $LIBTOOL_TARFILE http://ftpmirror.gnu.org/libtool/libtool-2.4.6.tar.gz
+		fi
+		cd $TERMUX_PKG_CACHEDIR
+		tar xf $LIBTOOL_TARFILE
+		cd libtool-2.4.6
+		./configure --prefix=$_CROSS_LIBTOOL_DIR --host=$TERMUX_HOST_PLATFORM --program-prefix=${TERMUX_HOST_PLATFORM}-
+		make install
+	fi
+
 	export TERMUX_PKG_SRCDIR=$TERMUX_PKG_SRCDIR/src
 }

disabled-packages/racket/port.c.patch

@@ -0,0 +1,36 @@
+"The getdtablesize functions has been deprecated by Posix and has been
+removed from Android's LB64 ABI. Replace calls to it with the modern
+equivalent sysconf(_SC_OPEN_MAX)."
+
+- https://groups.google.com/a/chromium.org/forum/#!topic/chromium-reviews/AXhZapYuHi8
+
+diff -u -r ../../racket-6.4/src/racket/src/port.c ./racket/src/port.c
+--- ../../racket-6.4/src/racket/src/port.c	2016-01-14 12:11:20.000000000 -0500
++++ ./racket/src/port.c	2016-04-10 17:43:40.039414493 -0400
+@@ -1090,7 +1090,7 @@
+ # ifdef USE_ULIMIT
+     dynamic_fd_size = ulimit(4, 0);
+ # else
+-    dynamic_fd_size = getdtablesize();
++    dynamic_fd_size = sysconf(_SC_OPEN_MAX);
+ # endif
+     /* divide by bits-per-byte: */
+     dynamic_fd_size = (dynamic_fd_size + 7) >> 3;
+@@ -1365,7 +1365,7 @@
+ #    ifdef FIXED_FD_LIMIT
+     limit = FIXED_FD_LIMIT;
+ #    else
+-    limit = getdtablesize();
++    limit = sysconf(_SC_OPEN_MAX);
+ #    endif
+ #   endif
+ #  endif
+@@ -10390,7 +10390,7 @@
+ # ifdef USE_ULIMIT
+   i = ulimit(4, 0);
+ # else
+-  i = getdtablesize();
++  i = sysconf(_SC_OPEN_MAX);
+ # endif
+   while (i--) {
+     int cr;