Cross compile windows

Makefile

@@ -1,6 +1,6 @@
-UNAME_S := $(shell uname -s)
-UNAME_P := $(shell uname -p)
-UNAME_M := $(shell uname -m)
+UNAME_S=${UNAME_S:-shell uname -s}
+UNAME_P=${UNAME_P:-shell uname -p}
+UNAME_M=${UNAME_M:-shell uname -m}
 
 # Mac OS + Arm can report x86_64
 # ref: https://github.com/ggerganov/whisper.cpp/issues/66#issuecomment-1282546789
@@ -78,13 +78,13 @@ main: examples/main/main.cpp ggml.o whisper.o
 	./main -h
 
 ggml.o: ggml.c ggml.h
-	$(CC)  $(CFLAGS)   -c ggml.c
+	$(CC)  $(CFLAGS) -c ggml.c -o ggml.o
 
 whisper.o: whisper.cpp whisper.h
-	$(CXX) $(CXXFLAGS) -c whisper.cpp
+	$(CXX) $(CXXFLAGS) -c whisper.cpp -o whisper.o
 
 libwhisper.a: ggml.o whisper.o
-	ar rcs libwhisper.a ggml.o whisper.o
+	$(AR) rcs libwhisper.a ggml.o whisper.o
 
 clean:
 	rm -f *.o main stream bench libwhisper.a

ggml.c

@@ -14,7 +14,7 @@
 #include <stdint.h>
 #include <stdio.h>
 
-#if defined _MSC_VER
+#if defined _MSC_VER || defined(__MINGW32__)
 #include <Windows.h>
 
 typedef volatile LONG atomic_int;
@@ -193,7 +193,7 @@ static ggml_fp16_t table_exp_f16[1 << 16];
 // timing
 //
 
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) || defined(__MINGW32__)
 static int64_t timer_freq;
 void ggml_time_init(void) {
     LARGE_INTEGER frequency;