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-rw-r--r--pkgs/os-specific/darwin/swift-corelibs/corefoundation.nix25
1 files changed, 23 insertions, 2 deletions
diff --git a/pkgs/os-specific/darwin/swift-corelibs/corefoundation.nix b/pkgs/os-specific/darwin/swift-corelibs/corefoundation.nix
index 6f7caa8ec02..4f2f84b3c0a 100644
--- a/pkgs/os-specific/darwin/swift-corelibs/corefoundation.nix
+++ b/pkgs/os-specific/darwin/swift-corelibs/corefoundation.nix
@@ -63,10 +63,31 @@ stdenv.mkDerivation {
   # I'm guessing at the version here. https://github.com/apple/swift-corelibs-foundation/commit/df3ec55fe6c162d590a7653d89ad669c2b9716b1 imported "high sierra"
   # and this version is a version from there. No idea how accurate it is.
   LDFLAGS = "-current_version 1454.90.0 -compatibility_version 150.0.0 -init ___CFInitialize";
-  configurePhase = "../configure release --sysroot UNUSED";
+
+  configurePhase = ''
+    ../configure release --sysroot UNUSED
+  '';
 
   enableParallelBuilding = true;
-  buildPhase = "ninja -j $NIX_BUILD_CORES";
+
+  # FIXME: Workaround for intermittent build failures of CFRuntime.c.
+  # Based on testing this issue seems to only occur with clang_7, so
+  # please remove this when updating the default llvm versions to 8 or
+  # later.
+  buildPhase = stdenv.lib.optionalString true ''
+    for i in {1..512}; do
+        if ninja -j $NIX_BUILD_CORES; then
+            break
+        fi
+
+        echo >&2
+        echo "[$i/512] retrying build, workaround for #66811" >&2
+        echo "  With clang_7 the build of CFRuntime.c fails intermittently." >&2
+        echo "  See https://github.com/NixOS/nixpkgs/issues/66811 for more details." >&2
+        echo >&2
+        continue
+    done
+  '';
 
   # TODO: their build system sorta kinda can do this, but it doesn't seem to work right now
   # Also, this includes a bunch of private headers in the framework, which is not what we want