Index: VirtualBox-6.1.4/Config.kmk
===================================================================
--- VirtualBox-6.1.4.orig/Config.kmk
+++ VirtualBox-6.1.4/Config.kmk
@@ -2684,8 +2684,16 @@ else
  # The reason for this hack is that the windows kmk_ash cannot deal with $((1+1)).
  # Some versions of gcc (e.g. openSUSE11) return only major.minor on `gcc -dumpversion`.
  # gcc-5 of openSUSE42.1 only returns the major version on `gcc -dumpversion`!
- VBOX_GCC_VERSION = $(shell ($(1) -dumpfullversion 2>/dev/null || $(1) -dumpversion) | \
-    $(SED_EXT) 's|\([0-9]\)\.\{0,1\}\([0-9]\{0,1\}\)\.\{0,1\}\([0-9]\{0,1\}\).*|$$(int-add $$(int-mul 10000, \1), $$(int-mul 100, $$(firstword \2 0)), $$(firstword \3 0))|' )
+ #
+ # Check to make sure that the compiler has either  -dumpfullversion or -dumpversion. gcc-10 has neither
+ RC = $(shell ($(1) -dumpfullversion 2>/dev/null || $(1) -dumpversion 2>/dev/null) ; echo $$?)
+ ifneq ($(RC),0)
+    # dump version commands not available - hardcode 10.0.1 for the moment
+    VBOX_GCC_VERSION = 100001
+ else
+    VBOX_GCC_VERSION = $(shell ($(1) -dumpfullversion 2>/dev/null || $(1) -dumpversion 2>/dev/null) | \
+       $(SED_EXT) 's|\([0-9]\)\.\{0,1\}\([0-9]\{0,1\}\)\.\{0,1\}\([0-9]\{0,1\}\).*|$$(int-add $$(int-mul 10000, \1), $$(int-mul 100, $$(firstword \2 0)), $$(firstword \3 0))|' )
+ endif
 endif
 # YASM macros
 ifndef DONT_USE_YASM
Index: VirtualBox-6.1.4/include/iprt/formats/mach-o.h
===================================================================
--- VirtualBox-6.1.4.orig/include/iprt/formats/mach-o.h
+++ VirtualBox-6.1.4/include/iprt/formats/mach-o.h
@@ -38,7 +38,7 @@
 /* cputype */
 #define CPU_ARCH_MASK               INT32_C(0xff000000)
 #define CPU_ARCH_ABI64              INT32_C(0x01000000)
-#define CPU_TYPE_ANY                INT32_C(-1)
+#define CPU_TYPE_ANY                INT32_C(999)
 #define CPU_TYPE_VAX                INT32_C(1)
 #define CPU_TYPE_MC680x0            INT32_C(6)
 #define CPU_TYPE_X86                INT32_C(7)
@@ -53,7 +53,7 @@
 #define CPU_TYPE_POWERPC64          (CPU_TYPE_POWERPC | CPU_ARCH_ABI64)
 
 /* cpusubtype */
-#define CPU_SUBTYPE_MULTIPLE        INT32_C(-1)
+#define CPU_SUBTYPE_MULTIPLE        -1
 #define CPU_SUBTYPE_LITTLE_ENDIAN   INT32_C(0)
 #define CPU_SUBTYPE_BIG_ENDIAN      INT32_C(1)