clang: Switch to upcoming 8.0 release branch

Clang 8.0 is going to be released in Feb-March 2019
so here we switch to release/8.x branch a bit early
so we can provide some feedback for release to be good on
OE

If one needs to use stable 7.0.1 release please use thud branch

clang 8.0 does have  RISC-V backend, enable it

clang: Add building experimental targets e.g. riscv

Signed-off-by: Khem Raj <raj.khem@gmail.com>

1 files changed, 23 insertions, 4 deletions

diff --git a/recipes-devtools/clang/clang_git.bb b/recipes-devtools/clang/clang_git.bb
index b3b8272..464f2f7 100644
--- a/recipes-devtools/clang/clang_git.bb
+++ b/recipes-devtools/clang/clang_git.bb
@@ -14,6 +14,12 @@ inherit cmake cmake-native
 
 OECMAKE_FIND_ROOT_PATH_MODE_PROGRAM = "BOTH"
 
+def get_clang_experimental_arch(bb, d, arch_var):
+    import re
+    a = d.getVar(arch_var, True)
+    if re.match('riscv(32|64)$', a):                 return 'RISCV'
+    return ""
+
 def get_clang_arch(bb, d, arch_var):
     import re
     a = d.getVar(arch_var, True)
@@ -24,9 +30,8 @@ def get_clang_arch(bb, d, arch_var):
     elif re.match('aarch64_be$', a):                   return 'AArch64'
     elif re.match('mips(isa|)(32|64|)(r6|)(el|)$', a): return 'Mips'
     elif re.match('p(pc|owerpc)(|64)', a):             return 'PowerPC'
-    elif re.match('riscv(32|64)$', a):                 return 'RISCV'
     else:
-        bb.error("cannot map '%s' to a supported llvm architecture" % a)
+        bb.note("'%s' is not a primary llvm architecture" % a)
     return ""
 
 def get_clang_host_arch(bb, d):
@@ -35,6 +40,9 @@ def get_clang_host_arch(bb, d):
 def get_clang_target_arch(bb, d):
     return get_clang_arch(bb, d, 'TARGET_ARCH')
 
+def get_clang_experimental_target_arch(bb, d):
+    return get_clang_experimental_arch(bb, d, 'TARGET_ARCH')
+
 PACKAGECONFIG ??= "compiler-rt libcplusplus shared-libs"
 PACKAGECONFIG_class-native = ""
 PACKAGECONFIG_class-nativesdk = "compiler-rt libcplusplus"
@@ -50,7 +58,11 @@ LLVM_TARGETS_TO_BUILD ?= "AArch64;ARM;BPF;Mips;PowerPC;X86"
 LLVM_TARGETS_TO_BUILD_append = ";${@get_clang_host_arch(bb, d)};${@get_clang_target_arch(bb, d)}"
 
 LLVM_TARGETS_TO_BUILD_TARGET ?= ""
-LLVM_TARGETS_TO_BUILD_TARGET_append ?= ";${@get_clang_target_arch(bb, d)}"
+LLVM_TARGETS_TO_BUILD_TARGET_append ?= "${@get_clang_target_arch(bb, d)}"
+
+LLVM_EXPERIMENTAL_TARGETS_TO_BUILD ?= "RISCV"
+LLVM_EXPERIMENTAL_TARGETS_TO_BUILD_append = ";${@get_clang_experimental_target_arch(bb, d)}"
+
 EXTRA_OECMAKE += "-DLLVM_ENABLE_ASSERTIONS=OFF \
                   -DLLVM_ENABLE_EXPENSIVE_CHECKS=OFF \
                   -DLLVM_ENABLE_PIC=ON \
@@ -70,11 +82,13 @@ EXTRA_OECMAKE += "-DLLVM_ENABLE_ASSERTIONS=OFF \
 
 EXTRA_OECMAKE_append_class-native = "\
                   -DLLVM_TARGETS_TO_BUILD='${LLVM_TARGETS_TO_BUILD}' \
+                  -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD='${LLVM_EXPERIMENTAL_TARGETS_TO_BUILD}' \
 "
 EXTRA_OECMAKE_append_class-nativesdk = "\
                   -DCMAKE_CROSSCOMPILING:BOOL=ON \
                   -DCROSS_TOOLCHAIN_FLAGS_NATIVE='-DCMAKE_TOOLCHAIN_FILE=${WORKDIR}/toolchain-native.cmake' \
                   -DLLVM_TARGETS_TO_BUILD='${LLVM_TARGETS_TO_BUILD}' \
+                  -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD='${LLVM_EXPERIMENTAL_TARGETS_TO_BUILD}' \
                   -DLLVM_TABLEGEN=${STAGING_BINDIR_NATIVE}/llvm-tblgen \
                   -DCLANG_TABLEGEN=${STAGING_BINDIR_NATIVE}/clang-tblgen \
 "
@@ -86,7 +100,12 @@ EXTRA_OECMAKE_append_class-target = "\
                   -DLLVM_TARGET_ARCH=${@get_clang_target_arch(bb, d)} \
                   -DLLVM_DEFAULT_TARGET_TRIPLE=${TARGET_SYS} \
 "
-
+EXTRA_OECMAKE_append_class-target_riscv64 = "\
+                  -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD='${LLVM_EXPERIMENTAL_TARGETS_TO_BUILD}' \
+"
+EXTRA_OECMAKE_append_class-target_riscv32 = "\
+                  -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD='${LLVM_EXPERIMENTAL_TARGETS_TO_BUILD}' \
+"
 DEPENDS = "zlib libffi libxml2 ninja-native"
 DEPENDS_append_class-nativesdk = " clang-native virtual/${TARGET_PREFIX}binutils-crosssdk virtual/${TARGET_PREFIX}gcc-crosssdk virtual/${TARGET_PREFIX}g++-crosssdk"
 DEPENDS_append_class-target = " clang-cross-${TARGET_ARCH} ${@bb.utils.contains('TOOLCHAIN', 'gcc', 'virtual/${TARGET_PREFIX}gcc virtual/${TARGET_PREFIX}g++', '', d)}"