Assume pthread on MinGW

Signed-off-by: Taiju Yamada <[email protected]>

make.inc

@@ -201,8 +201,12 @@ ASFLAGS += -DAS_FEATURE_LEVEL=$(as_feature_level) $(D_HAVE_AS_KNOWS_AVX512_y)
 
 
 # Check for pthreads
-have_threads ?= $(shell printf "int main(void){return 0;}\n" | $(CC) -x c - -o /dev/null -lpthread && echo y )
-THREAD_LD_$(have_threads) := -lpthread
+ifeq ($(arch),mingw)
+have_threads ?= y
+else
+have_threads ?= $(shell printf "int main(void){return 0;}\n" | $(CC) -x c - -o /dev/null -pthread && echo y )
+endif
+THREAD_LD_$(have_threads) := -pthread
 THREAD_CFLAGS_$(have_threads) := -DHAVE_THREADS
 
 progs: $(bin_PROGRAMS)