rust-llvm: convert to cmake build

Future versions of LLVM require cmake to build so it will be easier to
prove that out on a known good build and to allow future versions to use
this as common code.

recipes-devtools/rust/files/rust-llvm/0001-Don-t-build-unittests.patch

@@ -1,34 +0,0 @@
-From eee79cc95f57434c4b530da96c88494e9b5d056b Mon Sep 17 00:00:00 2001
-From: Steven Walter <stevenrwalter@gmail.com>
-Date: Sat, 27 Aug 2016 13:20:48 -0400
-Subject: [PATCH] Don't build unittests
-
----
- Makefile | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/Makefile b/Makefile
-index 2b9468a..2bb30f6 100644
---- a/Makefile
-+++ b/Makefile
-@@ -31,7 +31,7 @@ ifeq ($(BUILD_DIRS_ONLY),1)
-   OPTIONAL_DIRS := tools/clang/utils/TableGen
- else
-   DIRS := lib/Support lib/TableGen utils lib/IR lib tools/llvm-shlib \
--          tools/llvm-config tools docs cmake unittests
-+          tools/llvm-config tools docs cmake
-   OPTIONAL_DIRS := projects bindings
- endif
- 
-@@ -39,7 +39,7 @@ ifeq ($(BUILD_EXAMPLES),1)
-   OPTIONAL_DIRS += examples
- endif
- 
--EXTRA_DIST := test unittests llvm.spec include win32 Xcode
-+EXTRA_DIST := test llvm.spec include win32 Xcode
- 
- include $(LEVEL)/Makefile.config
- 
--- 
-2.7.4
-

recipes-devtools/rust/rust-llvm.inc

@@ -3,25 +3,33 @@ LICENSE = "NCSA"
 
 SRC_URI = "\
 	https://static.rust-lang.org/dist/rustc-${PV}-src.tar.gz;name=rust \
-	file://rust-llvm/0001-Don-t-build-unittests.patch \
 "
 
 S = "${WORKDIR}/rustc-${PV}/src/llvm"
 
 LIC_FILES_CHKSUM = "file://LICENSE.TXT;md5=4c0bc17c954e99fd547528d938832bfa"
 
-inherit autotools
+inherit cmake pythonnative
 
-EXTRA_OECONF += "--enable-targets=x86,x86_64,arm,aarch64,mips,powerpc"
-EXTRA_OECONF += "--enable-optimized"
-EXTRA_OECONF += "--disable-assertions"
-EXTRA_OECONF += "--disable-docs"
-EXTRA_OECONF += "--enable-bindings=none"
-EXTRA_OECONF += "--disable-terminfo"
-EXTRA_OECONF += "--disable-zlib"
-EXTRA_OECONF += "--disable-libffi"
+EXTRA_OECMAKE = " \
+    -DLLVM_TARGETS_TO_BUILD='X86;ARM;AArch64;PowerPC' \
+    -DLLVM_ENABLE_ASSERTIONS=OFF \
+    -DLLVM_BUILD_DOCS=OFF \
+    -DLLVM_ENABLE_TERMINFO=OFF \
+    -DLLVM_ENABLE_ZLIB=OFF \
+    -DLLVM_ENABLE_FFI=OFF \
+    -DLLVM_INSTALL_UTILS=ON \
+    -DLLVM_BUILD_TOOLS=ON \
+    -DLLVM_BUILD_EXAMPLES=OFF \
+    -DLLVM_INCLUDE_EXAMPLES=OFF \
+    -DLLVM_BUILD_TESTS=OFF \
+    -DLLVM_INCLUDE_TESTS=OFF \
+    -DLLVM_TARGET_ARCH=${TARGET_ARCH} \
+"
 
-EXTRA_OECONF += "--enable-keep-symbols"
+# The debug symbols are huge here (>2GB) so suppress them since they
+# provide almost no value. If you really need them then override this
+INHIBIT_PACKAGE_DEBUG_SPLIT = "1"
 
 PACKAGES += "${PN}-data"
 
@@ -29,16 +37,4 @@ PACKAGES += "${PN}-data"
 FILES_${PN}-data = "${datadir}"
 FILES_${PN}-dev += "${libdir}"
 
-do_install_append () {
-	# Remove the debug info (>2 GB) as part of normal operation
-	rm -rf ${D}${bindir}/.debug
-
-	cd ${D}${bindir} || bbfatal "failed to cd ${D}${bindir}"
-	for i in *-llvm-* *-llc *-lli *-FileCheck; do
-		link=$(echo $i | sed -e "s/${TARGET_SYS}-\(.*\)/\1/")
-		[ -e "${i}" ] || bbfatal "no such file to symlink to ${i}"
-		ln -sf "$i" "${link}" || bbfatal "failed to symlink ${link} to ${i}"
-	done
-}
-
 BBCLASSEXTEND = "native"