1 files changed, 35 insertions, 0 deletions
diff --git a/common/recipes-core/llvm/files/0002-llvm-allow-env-override-of-exe-path.patch b/common/recipes-core/llvm/files/0002-llvm-allow-env-override-of-exe-path.patch
new file mode 100644
index 00000000..7b490a81
--- /dev/null
+++ b/common/recipes-core/llvm/files/0002-llvm-allow-env-override-of-exe-path.patch
@@ -0,0 +1,35 @@
+From ac39269933a9011567722e69c02734beaa1191b3 Mon Sep 17 00:00:00 2001
+From: Martin Kelly <mkelly@xevo.com>
+Date: Fri, 19 May 2017 00:22:57 -0700
+Subject: [PATCH] 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.
+
+Signed-off-by: Martin Kelly <mkelly@xevo.com>
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+---
+ tools/llvm-config/llvm-config.cpp | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/tools/llvm-config/llvm-config.cpp b/tools/llvm-config/llvm-config.cpp
+index 892adc3b9dd..73b6989fa9e 100644
+--- a/tools/llvm-config/llvm-config.cpp
++++ b/tools/llvm-config/llvm-config.cpp
+@@ -226,6 +226,13 @@ 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;