darwin.Libc: stop vendoring headers from other packages

A number of headers in Libc are being vendored from other packages.
Instead of copying them from an earlier Libc, Libsystem now sources them
from their respective packages (see below). This allows Libc_old to be
dropped and avoids any potential clashes when building Libsystem.

libmalloc:
* malloc/malloc.h

libplatform:
* setjmp.h
* ucontext.h
* libkern/OSAtomic.h
* libkern/OSCacheControl.h

libpthread:
* pthread*.h
* sched.h
* spawn.h

syslog (vendored because only one file is needed):
* asl.h

xnu:
* spawn.h (a different one from libpthread)
* libproc.h

pkgs/os-specific/darwin/apple-source-releases/Libc/825_40_1.nix

@@ -1,13 +0,0 @@
-{ appleDerivation', stdenvNoCC, ed, unifdef }:
-
-appleDerivation' stdenvNoCC {
-  nativeBuildInputs = [ ed unifdef ];
-
-  installPhase = ''
-    export SRCROOT=$PWD
-    export DSTROOT=$out
-    export PUBLIC_HEADERS_FOLDER_PATH=include
-    export PRIVATE_HEADERS_FOLDER_PATH=include
-    bash xcodescripts/headers.sh
-  '';
-}

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/default.nix

@@ -266,7 +266,6 @@ 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=" {};