Add auto detection for the ARCH variable for AARCH64 and ARM
systems. This allows us to do a native build of the BaseTools
without the need to set ARCH externally.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <[email protected]>
---
 BaseTools/Source/C/GNUmakefile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/BaseTools/Source/C/GNUmakefile b/BaseTools/Source/C/GNUmakefile
index 6aa37e49fb9e..66baabb3f080 100644
--- a/BaseTools/Source/C/GNUmakefile
+++ b/BaseTools/Source/C/GNUmakefile
@@ -25,6 +25,12 @@ ifndef ARCH
   ifeq ($(patsubst i%86,IA32,$(uname_m)),IA32)
     ARCH=IA32
   endif
+  ifneq (,$(findstring aarch64,$(uname_m)))
+    ARCH=AARCH64
+  endif
+  ifneq (,$(findstring arm,$(uname_m)))
+    ARCH=ARM
+  endif
   ifndef ARCH
     $(info Could not detected ARCH from uname results)
     $(error ARCH is not defined!)
-- 
1.9.1

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