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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;
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