musl-obstack: fix build on darwin (#407671)

From 44679bc1a03302aa6b1eb19220d9723e9e0e4d3f Mon Sep 17 00:00:00 2001

From: usertam <code@usertam.dev>

Date: Fri, 16 May 2025 23:29:41 +0800

Subject: [PATCH] ignore obstack_free alias on darwin

clang will complain "error: aliases are not supported on darwin".

---

 obstack.c | 2 ++

 1 file changed, 2 insertions(+)

diff --git a/obstack.c b/obstack.c

index 1f2f4c7..b9be9dd 100644

--- a/obstack.c

+++ b/obstack.c

@@ -294,7 +294,9 @@ _obstack_free (struct obstack *h, void *obj)

     abort ();

 }

+#ifndef __APPLE__

 extern __typeof(_obstack_free) obstack_free __attribute__((alias("_obstack_free")));

+#endif

 _OBSTACK_SIZE_T

 _obstack_memory_used (struct obstack *h)

-- 

2.48.1

    sha256 = "sha256-oydS7FubUniMHAUWfg84OH9+CZ0JCrTXy7jzwOyJzC8=";

  };

  patches = lib.optionals stdenv.isDarwin [

    ./0001-ignore-obstack_free-alias-on-darwin.patch

  ];

  nativeBuildInputs = [

    autoreconfHook

    pkg-config

  meta = with lib; {

    homepage = "https://github.com/void-linux/musl-obstack";

    description = "An extraction of the obstack functions and macros from GNU libiberty for use with musl-libc";

    platforms = platforms.linux;

    platforms = platforms.unix;

    license = licenses.lgpl21Plus;

    maintainers = [ maintainers.pjjw ];

  };