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From 0570fe02c07244a8724c1e6c0437f893c8aa8e93 Mon Sep 17 00:00:00 2001
From: Martin Kelly <mkelly@xevo.com>
Date: Fri, 19 May 2017 00:22:57 -0700
Subject: [PATCH 2/2] 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.
To let it work in multilib environment, we need to provide a knob to supply
multilib dirname as well
Upstream-Status: Inappropriate [OE-Specific]
Signed-off-by: Martin Kelly <mkelly@xevo.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
tools/llvm-config/llvm-config.cpp | 35 ++++++++++++++++++++++---------
1 file changed, 25 insertions(+), 10 deletions(-)
diff --git a/tools/llvm-config/llvm-config.cpp b/tools/llvm-config/llvm-config.cpp
index bec89fef98c..91b4d6e4c43 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;
@@ -284,7 +291,7 @@ int main(int argc, char **argv) {
// bin dir).
sys::fs::make_absolute(CurrentPath);
CurrentExecPrefix =
- sys::path::parent_path(sys::path::parent_path(CurrentPath)).str();
+ sys::path::parent_path(sys::path::parent_path(sys::path::parent_path(CurrentPath))).str();
// Check to see if we are inside a development tree by comparing to possible
// locations (prefix style or CMake style).
@@ -293,7 +300,7 @@ int main(int argc, char **argv) {
DevelopmentTreeLayout = CMakeStyle;
ActiveObjRoot = LLVM_OBJ_ROOT;
} else if (sys::fs::equivalent(CurrentExecPrefix,
- Twine(LLVM_OBJ_ROOT) + "/bin")) {
+ Twine(LLVM_OBJ_ROOT) + "/bin/llvm8.0.0")) {
IsInDevelopmentTree = true;
DevelopmentTreeLayout = CMakeBuildModeStyle;
ActiveObjRoot = LLVM_OBJ_ROOT;
@@ -307,37 +314,45 @@ int main(int argc, char **argv) {
std::string ActivePrefix, ActiveBinDir, ActiveIncludeDir, ActiveLibDir,
ActiveCMakeDir;
std::string ActiveIncludeOption;
+ // Hack for Yocto: we need to override the multilib path when we are using
+ // llvm-config from within a target sysroot.
+ std::string Multilibdir = std::getenv("YOCTO_ALTERNATE_MULTILIB_NAME");
+ if (Multilibdir.empty()) {
+ Multilibdir = "/lib/llvm8.0.0" LLVM_LIBDIR_SUFFIX;
+ }
+
if (IsInDevelopmentTree) {
- ActiveIncludeDir = std::string(LLVM_SRC_ROOT) + "/include";
+ ActiveIncludeDir = std::string(LLVM_SRC_ROOT) + "/include/llvm8.0.0";
ActivePrefix = CurrentExecPrefix;
// CMake organizes the products differently than a normal prefix style
// layout.
+
switch (DevelopmentTreeLayout) {
case CMakeStyle:
- ActiveBinDir = ActiveObjRoot + "/bin";
- ActiveLibDir = ActiveObjRoot + "/lib" + LLVM_LIBDIR_SUFFIX;
+ ActiveBinDir = ActiveObjRoot + "/bin/llvm8.0.0";
+ ActiveLibDir = ActiveObjRoot + "/lib/llvm8.0.0" + LLVM_LIBDIR_SUFFIX;
ActiveCMakeDir = ActiveLibDir + "/cmake/llvm";
break;
case CMakeBuildModeStyle:
ActivePrefix = ActiveObjRoot;
- ActiveBinDir = ActiveObjRoot + "/bin/" + build_mode;
+ ActiveBinDir = ActiveObjRoot + "/bin/llvm8.0.0/" + build_mode;
ActiveLibDir =
- ActiveObjRoot + "/lib" + LLVM_LIBDIR_SUFFIX + "/" + build_mode;
+ ActiveObjRoot + "/lib/llvm8.0.0" + LLVM_LIBDIR_SUFFIX + "/" + build_mode;
ActiveCMakeDir = ActiveLibDir + "/cmake/llvm";
break;
}
// We need to include files from both the source and object trees.
ActiveIncludeOption =
- ("-I" + ActiveIncludeDir + " " + "-I" + ActiveObjRoot + "/include");
+ ("-I" + ActiveIncludeDir + " " + "-I" + ActiveObjRoot + "/include/llvm8.0.0");
} else {
ActivePrefix = CurrentExecPrefix;
- ActiveIncludeDir = ActivePrefix + "/include";
+ ActiveIncludeDir = ActivePrefix + "/include/llvm8.0.0";
SmallString<256> path(StringRef(LLVM_TOOLS_INSTALL_DIR));
sys::fs::make_absolute(ActivePrefix, path);
ActiveBinDir = path.str();
- ActiveLibDir = ActivePrefix + "/lib" + LLVM_LIBDIR_SUFFIX;
+ ActiveLibDir = ActivePrefix + Multilibdir;
ActiveCMakeDir = ActiveLibDir + "/cmake/llvm";
ActiveIncludeOption = "-I" + ActiveIncludeDir;
}
--
2.20.1
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