darwin.Libsystem: fix existing file error during build

pkgs/os-specific/darwin/apple-source-releases/Libc/default.nix

@@ -1,4 +1,4 @@
-{ appleDerivation', stdenvNoCC, ed, unifdef, Libc_old, Libc_10-9 }:
+{ appleDerivation', stdenvNoCC, ed, unifdef, Libc_10-9 }:
 
 appleDerivation' stdenvNoCC {
   nativeBuildInputs = [ ed unifdef ];
@@ -7,7 +7,6 @@ appleDerivation' stdenvNoCC {
     ./0001-Define-TARGET_OS_EMBEDDED-in-std-lib-io-if-not-defin.patch
   ];
 
-  # TODO: asl.h actually comes from syslog project now
   installPhase = ''
     export SRCROOT=$PWD
     export DSTROOT=$out
@@ -18,20 +17,6 @@ appleDerivation' stdenvNoCC {
     cp ${./CrashReporterClient.h} $out/include/CrashReporterClient.h
 
     cp ${Libc_10-9}/include/NSSystemDirectories.h $out/include
-
-    # Ugh Apple stopped releasing this stuff so we need an older one...
-    cp    ${Libc_old}/include/spawn.h    $out/include
-    cp    ${Libc_old}/include/setjmp.h   $out/include
-    cp    ${Libc_old}/include/ucontext.h $out/include
-    cp    ${Libc_old}/include/pthread*.h $out/include
-    cp    ${Libc_old}/include/sched.h    $out/include
-    cp -R ${Libc_old}/include/malloc     $out/include
-
-    mkdir -p $out/include/libkern
-    cp ${Libc_old}/include/asl.h                    $out/include
-    cp ${Libc_old}/include/libproc.h                $out/include
-    cp ${Libc_old}/include/libkern/OSAtomic.h       $out/include/libkern
-    cp ${Libc_old}/include/libkern/OSCacheControl.h $out/include/libkern
   '';
 
   appleHeaders = builtins.readFile ./headers.txt;

pkgs/os-specific/darwin/apple-source-releases/Libc/headers.txt

@@ -21,7 +21,6 @@ arpa/inet.h
 arpa/nameser_compat.h
 arpa/telnet.h
 arpa/tftp.h
-asl.h
 assert.h
 bitstring.h
 cpio.h
@@ -49,12 +48,8 @@ langinfo.h
 libc.h
 libc_private.h
 libgen.h
-libkern/OSAtomic.h
-libkern/OSCacheControl.h
-libproc.h
 limits.h
 locale.h
-malloc/malloc.h
 memory.h
 monetary.h
 monitor.h
@@ -72,24 +67,17 @@ protocols/routed.h
 protocols/rwhod.h
 protocols/talkd.h
 protocols/timed.h
-pthread.h
-pthread_impl.h
-pthread_spis.h
-pthread_workqueue.h
 ranlib.h
 readpassphrase.h
 regex.h
 runetype.h
-sched.h
 search.h
 secure/_common.h
 secure/_stdio.h
 secure/_string.h
 semaphore.h
-setjmp.h
 sgtty.h
 signal.h
-spawn.h
 stab.h
 standards.h
 stddef.h
@@ -112,7 +100,6 @@ time.h
 timeconv.h
 ttyent.h
 tzfile.h
-ucontext.h
 ulimit.h
 unistd.h
 util.h

pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix

@@ -1,7 +1,7 @@
-{ lib, stdenv, buildPackages, fetchzip
+{ lib, stdenv, buildPackages, fetchzip, fetchFromGitHub
 , appleDerivation', xnu, Libc, Libm, libdispatch, Libinfo
 , dyld, Csu, architecture, libclosure, CarbonHeaders, ncurses, CommonCrypto
-, copyfile, removefile, libresolvHeaders, libresolv, Libnotify, libplatform, libpthread
+, copyfile, removefile, libresolvHeaders, libresolv, Libnotify, libmalloc, libplatform, libpthread
 , mDNSResponder, launchd, libutilHeaders, hfsHeaders, darwin-stubs
 , headersOnly ? false
 , withLibresolv ? !headersOnly
@@ -30,6 +30,15 @@ let
       fi
     '';
   };
+
+  # Libsystem needs `asl.h` from syslog. This is the version corresponding to the 10.12 SDK
+  # source release, but it hasn’t changed in newer versions.
+  syslog.src = fetchFromGitHub {
+    owner = "apple-oss-distributions";
+    repo = "syslog";
+    rev = "syslog-349.50.5";
+    hash = "sha256-tXLW/TNsluhO1X9Rv3FANyzyOe5TE/hZz0gVo7JGvHA=";
+  };
 in
 appleDerivation' stdenv {
   dontBuild = true;
@@ -57,12 +66,19 @@ appleDerivation' stdenv {
                ${libclosure} ${CarbonHeaders} ${libdispatch} ${ncurses.dev} \
                ${CommonCrypto} ${copyfile} ${removefile} ${libresolvHeaders} \
                ${Libnotify} ${libplatform} ${mDNSResponder} ${launchd} \
-               ${libutilHeaders} ${libpthread} ${hfsHeaders}; do
+               ${libutilHeaders} ${libmalloc} ${libpthread} ${hfsHeaders}; do
       (cd $dep/include && find . -name '*.h' | copyHierarchy $out/include)
     done
 
     (cd ${buildPackages.darwin.cctools.dev}/include/mach-o && find . -name '*.h' | copyHierarchy $out/include/mach-o)
 
+    for header in pthread.h pthread_impl.h pthread_spis.h sched.h; do
+      ln -s "$out/include/pthread/$header" "$out/include/$header"
+    done
+
+    # Copy `asl.h` from the syslog sources since it is no longer provided as part of Libc.
+    cp ${syslog.src}/libsystem_asl.tproj/include/asl.h $out/include
+
     mkdir -p $out/include/os
 
     cp ${darling.src}/src/libc/os/activity.h $out/include/os

pkgs/os-specific/darwin/apple-source-releases/Libsystem/headers.txt

@@ -1381,17 +1381,13 @@ protocols/routed.h
 protocols/rwhod.h
 protocols/talkd.h
 protocols/timed.h
-pthread.h
 pthread/introspection.h
 pthread/pthread.h
 pthread/pthread_impl.h
 pthread/pthread_spis.h
 pthread/qos.h
 pthread/sched.h
 pthread/spawn.h
-pthread_impl.h
-pthread_spis.h
-pthread_workqueue.h
 pwd.h
 ranlib.h
 readpassphrase.h
@@ -1414,7 +1410,6 @@ rpc/xdr.h
 rpcsvc/yp_prot.h
 rpcsvc/ypclnt.h
 runetype.h
-sched.h
 search.h
 secure/_common.h
 secure/_stdio.h

pkgs/os-specific/darwin/apple-source-releases/default.nix

@@ -19,6 +19,7 @@ let
       Libinfo       = "503.50.4";
       Libsystem     = "1238.60.2";
       removefile    = "45";
+      libmalloc     = "116.50.8";
       libresolv     = "64";
       libplatform   = "126.50.8";
       mDNSResponder = "765.50.9";
@@ -265,14 +266,16 @@ developerToolsPackages_11_3_1 // macosPackages_11_0_1 // {
         rev    = "Libc-997.90.3";
         hash   = "sha256-B18RNO+Rai5XE52TKdJV7eknosTZ+bRERkiU12d/kPU=";
       };
-      Libc_old        = applePackage "Libc/825_40_1.nix" "osx-10.8.5"      "sha256-JvPSY7FzraGpqF/jYLfhU2o/2195NuKrXsryYfVtx3s=" {};
     };
     libclosure      = applePackage "libclosure"        "osx-10.11.6"     "sha256-L5rQ+UBpf3B+W1U+gZKk7fXulslHsc8lxnCsplV+nr0=" {};
     libdispatch     = applePackage "libdispatch"       "osx-10.10.5"     "sha256-jfAEk0OLrJa9AIZVikIoHomd+l+4rCfc320Xh50qK5M=" {};
     libiconv        = applePackage "libiconv"          "osx-10.12.6"     "sha256-ZzPFkchK3EU95UQUVVrR0t8iilhi/VnIkjjtP6KT2oI=" {};
     Libinfo         = applePackage "Libinfo"           "osx-10.11.6"     "sha256-6F7wiwerv4nz/xXHtp1qCHSaFzZgzcRN+jbmXA5oWOQ=" {};
     Libm            = applePackage "Libm"              "osx-10.7.4"      "sha256-KjMETfT4qJm0m0Ux/F6Rq8bI4Q4UVnFx6IKbKxXd+Es=" {};
     Libnotify       = applePackage "Libnotify"         "osx-10.12.6"     "sha256-6wvMBxAUfiYcQtmlfYCj1d3kFmFM/jdboTd7hRvi3e4=" {};
+    libmalloc       = if stdenv.isx86_64 then
+      applePackage "libmalloc" "osx-10.12.6" "sha256-brfG4GEF2yZipKdhlPq6DhT2z5hKYSb2MAmffaikdO4=" {}
+    else macosPackages_11_0_1.libmalloc;
     libplatform     = applePackage "libplatform"       "osx-10.12.6"     "sha256-6McMTjw55xtnCsFI3AB1osRagnuB5pSTqeMKD3gpGtM=" {};
     libpthread      = applePackage "libpthread"        "osx-10.12.6"     "sha256-QvJ9PERmrCWBiDmOWrLvQUKZ4JxHuh8gS5nlZKDLqE8=" {};
     libresolv       = applePackage "libresolv"         "osx-10.12.6"     "sha256-FtvwjJKSFX6j9APYPC8WLXVOjbHLZa1Gcoc8yxLy8qE=" {};

pkgs/os-specific/darwin/apple-source-releases/libmalloc/default.nix

@@ -0,0 +1,10 @@
+{ appleDerivation', stdenvNoCC }:
+
+# Unfortunately, buiding libmalloc is not feasible due to its use of non-public headers, but its
+# headers are needed by Libsystem.
+appleDerivation' stdenvNoCC {
+  installPhase = ''
+    mkdir -p $out/include
+    cp -R include/malloc $out/include/
+  '';
+}

pkgs/os-specific/darwin/apple-source-releases/macos-11.0.1.nix

@@ -28,6 +28,7 @@ hfs = applePackage' "hfs" "556.41.1" "macos-11.0.1" "0a0s6b12b0q07wslfifna0bj51d
 libclosure = applePackage' "libclosure" "78" "macos-11.0.1" "0vf9n0k3m8dbprv1bf45zqg0g43bidy2i5z1v9a826bsf8lv7am7" {};
 libdispatch = applePackage' "libdispatch" "1271.40.12" "macos-11.0.1" "1ck5srcjapg18vqb8wl08gacs7ndc6xr067qjn3ngx39q1jdcywz" {};
 libiconv = applePackage' "libiconv" "59" "macos-11.0.1" "0lwa4brdwm4lvrdnxylzsn1yph4m7csgri2zkc4xb4xiisz32pwp" {};
+libmalloc = applePackage' "libmalloc" "317.40.8" "macos-11.0.1" "sha256-Tdhb0mq3w4Hwvp3xHB79Vr22hCOQK6h28HCsd7jvITI=" {};
 libplatform = applePackage' "libplatform" "254.40.4" "macos-11.0.1" "1qf3ri0yd8b1xjln1j1gyx7ks6k3a2jhd63blyvfby75y9s7flky" {};
 libpthread = applePackage' "libpthread" "454.40.3" "macos-11.0.1" "0zljbw8mpb80n1if65hhi9lkgwbgjr8vc9wvf7q1nl3mzyl35f8p" {};
 libresolv = applePackage' "libresolv" "68" "macos-11.0.1" "045ahh8nvaam9whryc2f5g5xagwp7d187r80kcff82snp5p66aq1" {};

pkgs/os-specific/darwin/apple-source-releases/xnu/default.nix

@@ -116,6 +116,9 @@ appleDerivation' (if headersOnly then stdenvNoCC else stdenv) (
     cp EXTERNAL_HEADERS/Availability*.h $out/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/
     cp -r EXTERNAL_HEADERS/corecrypto $out/include
 
+    # These headers are needed by Libsystem.
+    cp libsyscall/wrappers/{spawn/spawn.h,libproc/libproc.h} $out/include
+
     # Build the mach headers we crave
     export SRCROOT=$PWD/libsyscall
     export DERIVED_SOURCES_DIR=$out/include

pkgs/os-specific/darwin/apple-source-releases/xnu/headers-arm64.txt

@@ -637,6 +637,7 @@ libkern/os/reason_private.h
 libkern/os/refcnt.h
 libkern/os/refcnt_internal.h
 libkern/os/trace.h
+libproc.h
 mach/arm/_structs.h
 mach/arm/asm.h
 mach/arm/boolean.h
@@ -1270,6 +1271,7 @@ servers/ls_defs.h
 servers/netname.h
 servers/netname_defs.h
 servers/nm_defs.h
+spawn.h
 sys/_endian.h
 sys/_posix_availability.h
 sys/_select.h

pkgs/os-specific/darwin/apple-source-releases/xnu/headers-x86_64.txt

@@ -554,6 +554,7 @@ libkern/os/object.h
 libkern/os/object_private.h
 libkern/os/overflow.h
 libkern/os/trace.h
+libproc.h
 mach/audit_triggers.defs
 mach/boolean.h
 mach/bootstrap.h
@@ -1116,6 +1117,7 @@ servers/ls_defs.h
 servers/netname.h
 servers/netname_defs.h
 servers/nm_defs.h
+spawn.h
 sys/_endian.h
 sys/_posix_availability.h
 sys/_select.h