diff --git a/cmake/Findclang.cmake b/cmake/Findclang.cmake
index 751cc5c824..13f9225a34 100644
--- a/cmake/Findclang.cmake
+++ b/cmake/Findclang.cmake
@@ -13,6 +13,7 @@ find_path(CLANG_INCLUDE_DIRS NAMES clang/Frontend/ASTUnit.h
         /usr/lib/llvm-10/include
         /usr/lib/llvm-10.0/include
         /usr/local/llvm100/include
+        /usr/local/llvm10/include
         /mingw64/include)
 
 macro(FIND_AND_ADD_CLANG_LIB _libname_)
@@ -24,6 +25,7 @@ macro(FIND_AND_ADD_CLANG_LIB _libname_)
             /usr/lib/llvm-10/lib
             /usr/lib/llvm-10.0/lib
             /usr/local/llvm100/lib
+            /usr/local/llvm10/lib
             /mingw64/lib
             /c/msys64/mingw64/lib
             c:\\msys64\\mingw64\\lib)
diff --git a/cmake/Findlld.cmake b/cmake/Findlld.cmake
index e27605a54d..123984ee11 100644
--- a/cmake/Findlld.cmake
+++ b/cmake/Findlld.cmake
@@ -10,12 +10,14 @@ find_path(LLD_INCLUDE_DIRS NAMES lld/Common/Driver.h
     PATHS
         /usr/lib/llvm-10/include
         /usr/local/llvm100/include
+        /usr/local/llvm10/include
         /mingw64/include)
 
 find_library(LLD_LIBRARY NAMES lld-10.0 lld100 lld
     PATHS
         /usr/lib/llvm-10/lib
         /usr/local/llvm100/lib
+        /usr/local/llvm10/lib
 )
 if(EXISTS ${LLD_LIBRARY})
     set(LLD_LIBRARIES ${LLD_LIBRARY})
@@ -27,6 +29,7 @@ else()
                 ${LLD_LIBDIRS}
                 /usr/lib/llvm-10/lib
                 /usr/local/llvm100/lib
+                /usr/local/llvm10/lib
                 /mingw64/lib
                 /c/msys64/mingw64/lib
                 c:/msys64/mingw64/lib)
diff --git a/cmake/Findllvm.cmake b/cmake/Findllvm.cmake
index 12e1ff7eb0..7d6a4b04da 100644
--- a/cmake/Findllvm.cmake
+++ b/cmake/Findllvm.cmake
@@ -9,7 +9,7 @@
 
 if("${ZIG_TARGET_TRIPLE}" STREQUAL "native")
   find_program(LLVM_CONFIG_EXE
-      NAMES llvm-config-10 llvm-config-10.0 llvm-config100 llvm-config
+      NAMES llvm-config-10 llvm-config-10.0 llvm-config100 llvm-config10 llvm-config
       PATHS
           "/mingw64/bin"
           "/c/msys64/mingw64/bin"
@@ -130,6 +130,7 @@ else()
         /usr/lib/llvm-10/include
         /usr/lib/llvm-10.0/include
         /usr/local/llvm100/include
+        /usr/local/llvm10/include
         /mingw64/include)
 
     macro(FIND_AND_ADD_LLVM_LIB _libname_)
@@ -141,6 +142,7 @@ else()
         /usr/lib/llvm-10/lib
         /usr/lib/llvm-10.0/lib
         /usr/local/llvm100/lib
+        /usr/local/llvm10/lib
         /mingw64/lib
         /c/msys64/mingw64/lib
         c:\\msys64\\mingw64\\lib)
diff --git a/lib/std/os/bits/dragonfly.zig b/lib/std/os/bits/dragonfly.zig
index 4a9b51d472..1e869679ef 100644
--- a/lib/std/os/bits/dragonfly.zig
+++ b/lib/std/os/bits/dragonfly.zig
@@ -244,6 +244,12 @@ pub const KERN_MAXID = 37;
 
 pub const HOST_NAME_MAX = 255;
 
+// access function
+pub const F_OK = 0; // test for existence of file
+pub const X_OK = 1; // test for execute or search permission
+pub const W_OK = 2; // test for write permission
+pub const R_OK = 4; // test for read permission
+
 pub const O_RDONLY = 0;
 pub const O_NDELAY = O_NONBLOCK;
 pub const O_WRONLY = 1;
@@ -277,7 +283,6 @@ pub const SEEK_END = 2;
 pub const SEEK_DATA = 3;
 pub const SEEK_HOLE = 4;
 
-pub const F_OK = 0;
 pub const F_ULOCK = 0;
 pub const F_LOCK = 1;
 pub const F_TLOCK = 2;