From dabfaef44438d7fc2c4d4b1742c8b13001c10a20 Mon Sep 17 00:00:00 2001
From: Artturin <Artturin@artturin.com>
Date: Wed, 15 Nov 2023 19:50:43 +0200
Subject: tests.cc-wrapper: add atomics test

`-std=c++17` is for clang 5
---
 pkgs/test/cc-wrapper/atomics.cc  |  8 ++++++++
 pkgs/test/cc-wrapper/default.nix | 11 ++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 pkgs/test/cc-wrapper/atomics.cc

(limited to 'pkgs/test/cc-wrapper')

diff --git a/pkgs/test/cc-wrapper/atomics.cc b/pkgs/test/cc-wrapper/atomics.cc
new file mode 100644
index 0000000000000..23601ae92f0b0
--- /dev/null
+++ b/pkgs/test/cc-wrapper/atomics.cc
@@ -0,0 +1,8 @@
+#include <atomic>
+#include <cstdint>
+
+int main()
+{
+  std::atomic_int x = {0};
+  return !std::atomic_is_lock_free(&x);
+}
diff --git a/pkgs/test/cc-wrapper/default.nix b/pkgs/test/cc-wrapper/default.nix
index 74009c97980d2..a0088751d4a24 100644
--- a/pkgs/test/cc-wrapper/default.nix
+++ b/pkgs/test/cc-wrapper/default.nix
@@ -9,7 +9,8 @@ let
   );
   staticLibc = lib.optionalString (stdenv.hostPlatform.libc == "glibc") "-L ${glibc.static}/lib";
   emulator = stdenv.hostPlatform.emulator buildPackages;
-  libcxxStdenvSuffix = lib.optionalString (stdenv.cc.libcxx != null) "-libcxx";
+  isCxx = stdenv.cc.libcxx != null;
+  libcxxStdenvSuffix = lib.optionalString isCxx "-libcxx";
 in stdenv.mkDerivation {
   pname = "cc-wrapper-test-${stdenv.cc.cc.pname}${libcxxStdenvSuffix}";
   version = stdenv.cc.version;
@@ -37,6 +38,14 @@ in stdenv.mkDerivation {
     $CXX -o include-cxxabi ${./include-cxxabi.cc}
     ${emulator} ./include-cxxabi
 
+    # cxx doesn't have libatomic.so
+    ${lib.optionalString (!isCxx) ''
+      # https://github.com/NixOS/nixpkgs/issues/91285
+      echo "checking whether libatomic.so can be linked... " >&2
+      $CXX -shared -o atomics.so ${./atomics.cc} -latomic ${lib.optionalString (stdenv.cc.isClang && lib.versionOlder stdenv.cc.version "6.0.0" ) "-std=c++17"}
+      $READELF -d ./atomics.so | grep libatomic.so && echo "ok" >&2 || echo "failed" >&2
+    ''}
+
     ${lib.optionalString (stdenv.isDarwin && stdenv.cc.isClang) ''
       echo "checking whether compiler can build with CoreFoundation.framework... " >&2
       mkdir -p foo/lib
-- 
cgit 1.4.1