rust: add makefile to do all the NetBSD bootstrap/cross builds.

[Havard Eidnes <he%NetBSD.org@localhost>]

Module Name:	pkgsrc-wip
Committed By:	Havard Eidnes <he%NetBSD.org@localhost>
Pushed By:	he
Date:		Sat Jan 22 18:32:11 2022 +0000
Changeset:	aa9a29a546c1d1142c028a1efbabe19e3091e789

Modified Files:
	rust/Makefile
Added Files:
	rust/do-cross.mk

Log Message:
rust: add makefile to do all the NetBSD bootstrap/cross builds.

Allow passing in the additions to CONFIGURE_ARGS via the
ADD_CONFIGURE_ARGS variable.

To see a diff of this commit:
https://wip.pkgsrc.org/cgi-bin/gitweb.cgi?p=pkgsrc-wip.git;a=commitdiff;h=aa9a29a546c1d1142c028a1efbabe19e3091e789

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

diffstat:
 rust/Makefile    |  3 ++
 rust/do-cross.mk | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 98 insertions(+)

diffs:
diff --git a/rust/Makefile b/rust/Makefile
index 7efad95e5f..33c5fbe8da 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -48,6 +48,9 @@ CONFIGURE_ARGS+=		--disable-ninja
 # Include (optional) settings to cross-build rust
 .include "cross.mk"
 
+# optional from do-cross.mk
+CONFIGURE_ARGS+=		${ADD_CONFIGURE_ARGS}
+
 # Getting RPATH with $ORIGIN into bootstrap may be troublesome, so
 # uncommenting the LD_LIBRARY_PATH setting may be required to run
 # the bootstrap
diff --git a/rust/do-cross.mk b/rust/do-cross.mk
new file mode 100644
index 0000000000..769c1da85d
--- /dev/null
+++ b/rust/do-cross.mk
@@ -0,0 +1,95 @@
+# Do all the NetBSD cross builds
+# Collect the bootstrap kits in dist/
+
+VERSION!=	make show-var VARNAME=PKGVERSION
+
+SHORT_TARGETS+=	armv7
+SHORT_TARGETS+=	sparc64
+SHORT_TARGETS+=	powerpc
+SHORT_TARGETS+=	powerpc90
+SHORT_TARGETS+=	arm64
+SHORT_TARGETS+=	arm64_be
+SHORT_TARGETS+=	i386
+
+# Root of target directories.
+# Must have dest/ (build.sh's DESTDIR) and tools/ subdirectories
+ROOT.armv7=	/u/evbarm-armv7hf
+ROOT.sparc64=	/u/sparc64
+ROOT.powerpc=	/u/macppc
+ROOT.powerpc90=	/u/9.0-macppc
+ROOT.arm64=	/u/evbarm64
+ROOT.arm64_be=	/u/evbarm64eb
+ROOT.i386=	/u/i386
+
+# Mapping to GNU triple
+G_TGT.armv7=	armv7--netbsdelf-eabihf
+G_TGT.sparc64=	sparc64--netbsd
+G_TGT.powerpc=	powerpc--netbsd
+G_TGT.powerpc90=powerpc--netbsd
+G_TGT.arm64=	aarch64--netbsd
+G_TGT.arm64_be=	aarch64_be--netbsd
+G_TGT.i386=	i486--netbsdelf
+
+# Mapping to rust's TARGET specification
+TGT.armv7=	armv7-unknown-netbsd-eabihf
+TGT.sparc64=	sparc64-unknown-netbsd
+TGT.powerpc=	powerpc-unknown-netbsd
+TGT.powerpc90=	powerpc-unknown-netbsd
+TGT.arm64=	aarch64-unknown-netbsd
+TGT.arm64_be=	aarch64_be-unknown-netbsd
+TGT.i386=	i586-unknown-netbsd
+
+# Optional target tweak for bootstrap files
+TT.powerpc90=	powerpc-unknown-netbsd90
+
+WRKDIR=		${.CURDIR}/work
+SCRIPTS=	${WRKDIR}/scripts
+
+#DEBUG=		echo
+
+# Make list of make targets
+.for st in ${SHORT_TARGETS}
+MTGTS+=	do-${st}
+.endfor
+
+all: ${MTGTS}
+
+# Define the individual build targets, used above
+.for st in ${SHORT_TARGETS}
+CA.${st}=--host=${TGT.${st}}
+CA.${st}+=--target=${TGT.${st}}
+CA.${st}+=--set=target.${TGT.${st}}.cc=${SCRIPTS}/gcc-wrap
+CA.${st}+=--set=target.${TGT.${st}}.cxx=${SCRIPTS}/c++-wrap
+CA.${st}+=--set=target.${TGT.${st}}.linker=${SCRIPTS}/gcc-wrap
+CA.${st}+=--set=target.${TGT.${st}}.ar=${ROOT.${st}}/tools/bin/${G_TGT.${st}}-ar
+do-${st}:
+	mkdir -p dist
+	echo "=======> Cross-building rust for ${st}"
+	${DEBUG} make -f Makefile clean
+	${DEBUG} env \
+		CROSS_ROOT=${ROOT.${st}} \
+		GNU_CROSS_TARGET=${G_TGT.${st}} \
+		make -f Makefile \
+			ADD_CONFIGURE_ARGS="${CA.${st}}" \
+			TARGET=${TGT.${st}}
+	if [ "${TT.${st}}" != "" ]; then \
+		TT=${TT.${st}}; \
+	else \
+		TT=${TGT.${st}}; \
+	fi; \
+	distdir=${WRKDIR}/rustc-${VERSION}-src/build/dist; \
+	for comp in rust rust-std; do \
+		src=$${distdir}/$${comp}-${VERSION}-${TGT.${st}}.tar.gz; \
+		tgt=dist/$${comp}-${VERSION}-$${TT}.tar.gz; \
+		if [ ! -f "$${tgt}" ]; then \
+			echo ln $${src} $${tgt}; \
+			${DEBUG} ln $${src} $${tgt}; \
+		fi; \
+	done; \
+	src_comp=rust-src-${VERSION}.tar.gz; \
+	if [ ! -f dist/$${src_comp} ]; then \
+		echo ln $${distdir}/$${src_comp} dist; \
+		${DEBUG} ln $${distdir}/$${src_comp} dist; \
+	fi
+.endfor
+