libphobos: Merge upstream phobos 66ae77ac3

Finishes off phobos support for musl targets.

Reviewed-on: https://github.com/dlang/phobos/pull/7108

From-SVN: r274770

libphobos/src/MERGE

-3dc363783ea7b1e82336983486a14f3f44bbeadd
+66ae77ac3f97a007a12738e4bc02b3bbfef99bba
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/phobos repository.

libphobos/src/std/experimental/allocator/building_blocks/region.d

@@ -580,6 +580,12 @@ struct InSituRegion(size_t size, size_t minAlign = platformAlignment)
     assert(a.length == 2001);
 }
 
+version(CRuntime_Musl)
+{
+    // sbrk and brk are disabled in Musl:
+    // https://git.musl-libc.org/cgit/musl/commit/?id=7a995fe706e519a4f55399776ef0df9596101f93
+    // https://git.musl-libc.org/cgit/musl/commit/?id=863d628d93ea341b6a32661a1654320ce69f6a07
+} else:
 private extern(C) void* sbrk(long);
 private extern(C) int brk(shared void*);
 

libphobos/src/std/socket.d

@@ -163,47 +163,7 @@ string formatSocketError(int err) @trusted
         {
             cs = strerror_r(err, buf.ptr, buf.length);
         }
-        else version (OSX)
-        {
-            auto errs = strerror_r(err, buf.ptr, buf.length);
-            if (errs == 0)
-                cs = buf.ptr;
-            else
-                return "Socket error " ~ to!string(err);
-        }
-        else version (FreeBSD)
-        {
-            auto errs = strerror_r(err, buf.ptr, buf.length);
-            if (errs == 0)
-                cs = buf.ptr;
-            else
-                return "Socket error " ~ to!string(err);
-        }
-        else version (NetBSD)
-        {
-            auto errs = strerror_r(err, buf.ptr, buf.length);
-            if (errs == 0)
-                cs = buf.ptr;
-            else
-                return "Socket error " ~ to!string(err);
-        }
-        else version (DragonFlyBSD)
-        {
-            auto errs = strerror_r(err, buf.ptr, buf.length);
-            if (errs == 0)
-                cs = buf.ptr;
-            else
-                return "Socket error " ~ to!string(err);
-        }
-        else version (Solaris)
-        {
-            auto errs = strerror_r(err, buf.ptr, buf.length);
-            if (errs == 0)
-                cs = buf.ptr;
-            else
-                return "Socket error " ~ to!string(err);
-        }
-        else version (CRuntime_Bionic)
+        else
         {
             auto errs = strerror_r(err, buf.ptr, buf.length);
             if (errs == 0)
@@ -211,8 +171,6 @@ string formatSocketError(int err) @trusted
             else
                 return "Socket error " ~ to!string(err);
         }
-        else
-            static assert(0);
 
         auto len = strlen(cs);
 

libphobos/src/std/stdio.d

@@ -44,38 +44,38 @@ version (CRuntime_Glibc)
     version = GCC_IO;
     version = HAS_GETDELIM;
 }
-
-version (OSX)
+else version (CRuntime_Bionic)
 {
     version = GENERIC_IO;
     version = HAS_GETDELIM;
 }
-
-version (FreeBSD)
+else version (CRuntime_Musl)
 {
     version = GENERIC_IO;
     version = HAS_GETDELIM;
 }
 
-version (NetBSD)
+version (OSX)
 {
     version = GENERIC_IO;
     version = HAS_GETDELIM;
 }
-
-version (DragonFlyBSD)
+else version (FreeBSD)
 {
     version = GENERIC_IO;
     version = HAS_GETDELIM;
 }
-
-version (Solaris)
+else version (NetBSD)
 {
     version = GENERIC_IO;
-    version = NO_GETDELIM;
+    version = HAS_GETDELIM;
 }
-
-version (CRuntime_Bionic)
+else version (DragonFlyBSD)
+{
+    version = GENERIC_IO;
+    version = HAS_GETDELIM;
+}
+else version (Solaris)
 {
     version = GENERIC_IO;
     version = NO_GETDELIM;