[clang] [Driver] Have -rdynamic be a no-op on Haiku (PR #67872)

[Brad Smith via cfe-commits]

https://github.com/brad0 created https://github.com/llvm/llvm-project/pull/67872

Do the same as the Haiku GCC patches.

https://github.com/haikuports/haikuports/commit/46afdec05771d126eb6cb6c3b3deb957604617c4

>From 457174b938681c23bb652cf58aabaa1d25587d13 Mon Sep 17 00:00:00 2001
From: Brad Smith <brad at comstyle.com>
Date: Fri, 29 Sep 2023 22:09:09 -0400
Subject: [PATCH] [Driver] Have -rdynamic be a no-op on Haiku

Do the same as the Haiku GCC patches.

https://github.com/haikuports/haikuports/commit/46afdec05771d126eb6cb6c3b3deb957604617c4
---
 clang/lib/Driver/ToolChains/Haiku.cpp | 5 +++--
 clang/test/Driver/haiku.c             | 5 +++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/clang/lib/Driver/ToolChains/Haiku.cpp b/clang/lib/Driver/ToolChains/Haiku.cpp
index 33d71f030e51c51..0f8453ad861f9d3 100644
--- a/clang/lib/Driver/ToolChains/Haiku.cpp
+++ b/clang/lib/Driver/ToolChains/Haiku.cpp
@@ -42,6 +42,9 @@ void haiku::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   // Silence warning for "clang -pie foo.o -o foo"
   Args.ClaimAllArgs(options::OPT_pie);
 
+  // -rdynamic is a no-op with Haiku. Claim argument to avoid warning.
+  Args.ClaimAllArgs(options::OPT_rdynamic);
+
   if (!D.SysRoot.empty())
     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
 
@@ -49,8 +52,6 @@ void haiku::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   if (Static) {
     CmdArgs.push_back("-Bstatic");
   } else {
-    if (Args.hasArg(options::OPT_rdynamic))
-      CmdArgs.push_back("-export-dynamic");
     if (Shared)
       CmdArgs.push_back("-shared");
     CmdArgs.push_back("--enable-new-dtags");
diff --git a/clang/test/Driver/haiku.c b/clang/test/Driver/haiku.c
index 021ab522be06e5c..9dcae3631b98925 100644
--- a/clang/test/Driver/haiku.c
+++ b/clang/test/Driver/haiku.c
@@ -56,6 +56,11 @@
 // CHECK-LD-X86_64-SAME: {{^}} "[[SYSROOT]]/boot/system/develop/tools/lib/gcc/x86_64-unknown-haiku/13.2.0/crtendS.o"
 // CHECK-LD-X86_64-SAME: {{^}} "[[SYSROOT]]/boot/system/develop/lib/crtn.o"
 
+// Check -rdynamic is a no-op
+// RUN: %clang -### -rdynamic %s 2>&1 --target=x86_64-unknown-haiku \
+// RUN:    | FileCheck --check-prefix=CHECK-RDYNAMIC %s
+// CHECK-RDYNAMIC-NOT: "-export-dynamic"
+
 // Check the right flags are present with -shared
 // RUN: %clang -### %s -shared 2>&1 --target=x86_64-unknown-haiku \
 // RUN:     --gcc-toolchain="" \