ecl: add package for embeddable common lisp

Fixes #183

packages/ecl/build.sh

@@ -0,0 +1,48 @@
+TERMUX_PKG_HOMEPAGE=https://common-lisp.net/project/ecl/
+TERMUX_PKG_DESCRIPTION="ECL (Embeddable Common Lisp) is an interpreter of the Common Lisp language."
+TERMUX_PKG_LICENSE="LGPL-2.0"
+TERMUX_PKG_VERSION="20.4.24"
+TERMUX_PKG_REVISION=1
+TERMUX_PKG_SRCURL=https://common-lisp.net/project/ecl/static/files/release/ecl-${TERMUX_PKG_VERSION}.tgz
+TERMUX_PKG_SHA256=670838edf258a936b522fdb620da336de7e575aa0d27e34841727252726d0f07
+TERMUX_PKG_DEPENDS="libandroid-support"
+TERMUX_PKG_HOSTBUILD=true
+TERMUX_PKG_NO_STATICSPLIT=true
+TERMUX_PKG_BLACKLISTED_ARCHES="i686,x86_64"
+TERMUX_PKG_HAS_DEBUG=false
+
+# See https://gitlab.com/embeddable-common-lisp/ecl/-/blob/develop/INSTALL
+# for upstream cross build guide.
+
+# ECL needs itself during build, so we need to build it for the host first.
+termux_step_host_build() {
+	srcdir=$TERMUX_PKG_SRCDIR/src
+	hostprefix=$TERMUX_PKG_HOSTBUILD_DIR/prefix
+	mkdir hostprefix
+	$srcdir/configure --prefix=$hostprefix --srcdir=$srcdir --disable-c99complex
+	make
+	make install
+}
+
+termux_step_configure() {
+	# Copy cross_config for target architecture.
+	case $TERMUX_ARCH in
+		aarch64) crossconfig=android-arm64 ;;
+		arm)     crossconfig=android-arm ;;
+		*)       termux_error_exit "Unsupported arch: $TERMUX_ARCH" ;;
+	esac
+	crossconfig="$TERMUX_PKG_SRCDIR/src/util/$crossconfig.cross_config"
+	export ECL_TO_RUN=$TERMUX_PKG_HOSTBUILD_DIR/prefix/bin/ecl
+
+	# Boehm GC is not compatible with ld.gold linker, use ld.bfd instead.
+	export LDFLAGS="$LDFLAGS -fuse-ld=bfd"
+
+	srcdir=$TERMUX_PKG_SRCDIR/src
+	$srcdir/configure \
+		--srcdir=$srcdir \
+		--prefix=$TERMUX_PREFIX \
+		--host=$TERMUX_HOST_PLATFORM \
+		--with-cross-config=$crossconfig \
+		--disable-c99complex \
+		--enable-gmp=builtin
+}