[flang-commits] [clang] [flang] [flang][Driver] When linking with the Fortran runtime also link with libexecinfo (PR #125998)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-flang-driver

Author: Brad Smith (brad0)

<details>
<summary>Changes</summary>

Also link with libexecinfo on FreeBSD, NetBSD, OpenBSD and DragonFly
for the backtrace functions.

---
Full diff: https://github.com/llvm/llvm-project/pull/125998.diff


2 Files Affected:

- (modified) clang/lib/Driver/ToolChains/CommonArgs.cpp (+5) 
- (added) flang/test/Driver/backtrace.f90 (+3) 


``````````diff
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index c3c22a419f352a3..699aadec86dcba9 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -1340,6 +1340,11 @@ void tools::addFortranRuntimeLibs(const ToolChain &TC, const ArgList &Args,
     CmdArgs.push_back("-lFortranRuntime");
     CmdArgs.push_back("-lFortranDecimal");
     addArchSpecificRPath(TC, Args, CmdArgs);
+
+    // needs libexecinfo for backtrace functions
+    if (TC.getTriple().isOSFreeBSD() || TC.getTriple().isOSNetBSD() ||
+        TC.getTriple().isOSOpenBSD() || TC.getTriple().isOSDragonFly())
+      CmdArgs.push_back("-lexecinfo");
   }
 
   // libomp needs libatomic for atomic operations if using libgcc
diff --git a/flang/test/Driver/backtrace.f90 b/flang/test/Driver/backtrace.f90
new file mode 100644
index 000000000000000..eb7f2208e5bbd4e
--- /dev/null
+++ b/flang/test/Driver/backtrace.f90
@@ -0,0 +1,3 @@
+!RUN: %flang --target=aarch64-unknown-openbsd -### %s 2>&1 | FileCheck --check-prefixes=BACKTRACE %s
+
+!BACKTRACE: -lexecinfo

``````````

</details>


https://github.com/llvm/llvm-project/pull/125998