From 4b513bf033833ebcd1cbd341ea2f8ecda6cdf22f Mon Sep 17 00:00:00 2001
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From: Martin Kelly <mkelly@xevo.com>
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Date: Fri, 19 May 2017 00:22:57 -0700
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Subject: [PATCH] llvm: allow env override of exe path
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When using a native llvm-config from inside a sysroot, we need llvm-config to
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return the libraries, include directories, etc. from inside the sysroot rather
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than from the native sysroot. Thus provide an env override for calling
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llvm-config from a target sysroot.
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Signed-off-by: Martin Kelly <mkelly@xevo.com>
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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---
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llvm/tools/llvm-config/llvm-config.cpp | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/llvm/tools/llvm-config/llvm-config.cpp b/llvm/tools/llvm-config/llvm-config.cpp
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index 1a2f04552d13..019d8f2b5c5e 100644
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--- a/llvm/tools/llvm-config/llvm-config.cpp
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+++ b/llvm/tools/llvm-config/llvm-config.cpp
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@@ -247,6 +247,13 @@ Typical components:\n\
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/// Compute the path to the main executable.
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std::string GetExecutablePath(const char *Argv0) {
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+ // Hack for Yocto: we need to override the root path when we are using
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+ // llvm-config from within a target sysroot.
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+ const char *Sysroot = std::getenv("YOCTO_ALTERNATE_EXE_PATH");
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+ if (Sysroot != nullptr) {
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+ return Sysroot;
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+ }
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+
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// This just needs to be some symbol in the binary; C++ doesn't
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// allow taking the address of ::main however.
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void *P = (void *)(intptr_t)GetExecutablePath;
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