[clang] [clang] add llvm abi support (PR #121123)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang

@llvm/pr-subscribers-clang-driver

Author: Tristan Ross (RossComputerGuy)

<details>
<summary>Changes</summary>

This PR makes it possible to use the LLVM ABI which uses LLVM libc.

---
Full diff: https://github.com/llvm/llvm-project/pull/121123.diff


2 Files Affected:

- (modified) clang/lib/Driver/Driver.cpp (+1-1) 
- (modified) clang/lib/Driver/ToolChains/Gnu.cpp (+1-1) 


``````````diff
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index dc84c1b9d1cc4e..98b8e6e97419c6 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -1531,7 +1531,7 @@ Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
 
   // Check if the environment version is valid except wasm case.
   llvm::Triple Triple = TC.getTriple();
-  if (!Triple.isWasm()) {
+  if (!Triple.isWasm() && Triple.getEnvironment() != llvm::Triple::LLVM) {
     StringRef TripleVersionName = Triple.getEnvironmentVersionString();
     StringRef TripleObjectFormat =
         Triple.getObjectFormatTypeName(Triple.getObjectFormat());
diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
index 8397f1121ec2ce..2c9539ef56683c 100644
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -464,7 +464,7 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
       if (!Args.hasArg(options::OPT_shared)) {
         if (Args.hasArg(options::OPT_pg))
           crt1 = "gcrt1.o";
-        else if (IsPIE)
+        else if (IsPIE && Triple.getEnvironment() != llvm::Triple::LLVM)
           crt1 = "Scrt1.o";
         else if (IsStaticPIE)
           crt1 = "rcrt1.o";

``````````

</details>


https://github.com/llvm/llvm-project/pull/121123