mesa,llvm,meson: Update llvm to 8.0.1 plus define and use LLVM version globally

- Add missing dependency on libedit
- Define LLVMVERSION on the same lines as GCCVERSION and other tools
- Use LLVMVERSION in mesa and meson.bbclass to get llvm version instead of
  hardcoding it
- Use llvm patches unmodified from meta-clang, helps in keeping them in
  sync
- Define PREFERRED_VERSION for llvm, llvm-native, nativesdk-llvm

(From OE-Core rev: 3c08b638348abd543fc92baf56c28ca16ae6aac6)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/meta/recipes-devtools/llvm/llvm/0007-llvm-allow-env-override-of-exe-path.patch b/meta/recipes-devtools/llvm/llvm/0007-llvm-allow-env-override-of-exe-path.patch
new file mode 100644
index 0000000000..f47080c9fd
--- /dev/null
+++ b/meta/recipes-devtools/llvm/llvm/0007-llvm-allow-env-override-of-exe-path.patch
@@ -0,0 +1,38 @@
+From b66d6f39a374b8df41e7235351e5dee2e81f440c Mon Sep 17 00:00:00 2001
+From: Martin Kelly <mkelly@xevo.com>
+Date: Fri, 19 May 2017 00:22:57 -0700
+Subject: [PATCH 07/19] llvm: allow env override of exe path
+
+When using a native llvm-config from inside a sysroot, we need llvm-config to
+return the libraries, include directories, etc. from inside the sysroot rather
+than from the native sysroot. Thus provide an env override for calling
+llvm-config from a target sysroot.
+
+Upstream-Status: Pending
+Signed-off-by: Martin Kelly <mkelly@xevo.com>
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ llvm/tools/llvm-config/llvm-config.cpp | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/llvm/tools/llvm-config/llvm-config.cpp b/llvm/tools/llvm-config/llvm-config.cpp
+index 7ef7c46a262..a4f7ed82c7b 100644
+--- a/llvm/tools/llvm-config/llvm-config.cpp
++++ b/llvm/tools/llvm-config/llvm-config.cpp
+@@ -225,6 +225,13 @@ Typical components:\n\
+ 
+ /// Compute the path to the main executable.
+ std::string GetExecutablePath(const char *Argv0) {
++  // Hack for Yocto: we need to override the root path when we are using
++  // llvm-config from within a target sysroot.
++  const char *Sysroot = std::getenv("YOCTO_ALTERNATE_EXE_PATH");
++  if (Sysroot != nullptr) {
++    return Sysroot;
++  }
++
+   // This just needs to be some symbol in the binary; C++ doesn't
+   // allow taking the address of ::main however.
+   void *P = (void *)(intptr_t)GetExecutablePath;
+-- 
+2.22.0
+