260302.012428.CST [skip ci] revise Makefile.common

Author: zaikunzhang

fortran/examples/Makefile.common

@@ -24,8 +24,8 @@ ifeq ($(FFORT),"")  # The quotation marks are necessary
 endif
 # On Windows, we need to specify the clang_rt.
 ifeq ($(OS),Windows_NT)
-	ARCH := $(shell uname -m)
-	CLANGRT := "$(shell find "/c/Program Files/LLVM" -name "clang_rt.builtins*$(ARCH)" 2>/dev/null)"  # Note the quotation marks to handle spaces in the path.
+	ARCH := $(shell $(FFORT) -dumpmachine | cut -d- -f)
+	CLANGRT := "$(shell find "/c/Program Files/LLVM" -name "clang_rt.builtins*$(ARCH)*" 2>/dev/null)"  # Note the quotation marks to handle spaces in the path.
 	FFORT := $(FFORT) $(CLANGRT)
 endif
 # On macOS, we need to link against the system libraries.