Made cpu_features into a submodule

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "external/cpu_features"]
+ path = external/cpu_features
+ url = https://github.com/google/cpu_features.git

Makefile

@@ -86,7 +86,7 @@ CPUFEATURES ?= no
 
 ifeq ($(CPUFEATURES),yes)
  include Makefile.cpufeatures
- CPPFLAGS += -DENABLE_CPUFEATURES -Icpu_features/include
+ CPPFLAGS += -DENABLE_CPUFEATURES -Iexternal/cpu_features/include
 endif
 
 RTLSDR ?= yes
@@ -202,7 +202,7 @@ starch-benchmark: cpu.o dsp/helpers/tables.o $(CPUFEATURES_OBJS) $(STARCH_OBJS)
  $(CC) -g -o $@ $^ $(LDFLAGS) $(LIBS)
 
 clean:
- rm -f *.o oneoff/*.o compat/clock_gettime/*.o compat/clock_nanosleep/*.o cpu_features/src/*.o dsp/generated/*.o dsp/helpers/*.o $(CPUFEATURES_OBJS) dump1090 view1090 faup1090 cprtests crctests oneoff/convert_benchmark oneoff/decode_comm_b oneoff/dsp_error_measurement oneoff/uc8_capture_stats starch-benchmark
+ rm -f *.o oneoff/*.o compat/clock_gettime/*.o compat/clock_nanosleep/*.o external/cpu_features/src/*.o dsp/generated/*.o dsp/helpers/*.o $(CPUFEATURES_OBJS) dump1090 view1090 faup1090 cprtests crctests oneoff/convert_benchmark oneoff/decode_comm_b oneoff/dsp_error_measurement oneoff/uc8_capture_stats starch-benchmark
 
 test: cprtests
  ./cprtests

Makefile.cpufeatures

@@ -5,11 +5,11 @@
 CPUFEATURES_UNAME := $(shell uname)
 CPUFEATURES_ARCH := $(shell uname -m)
 
-CPUFEATURES_OBJS := cpu_features/src/filesystem.o cpu_features/src/stack_line_reader.o cpu_features/src/string_view.o
+CPUFEATURES_OBJS := external/cpu_features/src/filesystem.o external/cpu_features/src/stack_line_reader.o external/cpu_features/src/string_view.o
 CPUFEATURES_CFLAGS := -std=c99 -O -g -DSTACK_LINE_READER_BUFFER_SIZE=1024 -DNDEBUG
 
 ifeq ($(CPUFEATURES_UNAME),Linux)
- CPUFEATURES_OBJS += cpu_features/src/hwcaps.o
+ CPUFEATURES_OBJS += external/cpu_features/src/hwcaps.o
  CPUFEATURES_CFLAGS += -DHAVE_STRONG_GETAUXVAL
 endif
 
@@ -18,20 +18,20 @@ ifeq ($(CPUFEATURES_UNAME),Darwin)
 endif
 
 ifeq ($(CPUFEATURES_ARCH),x86_64)
- CPUFEATURES_OBJS += cpu_features/src/cpuinfo_x86.o
+ CPUFEATURES_OBJS += external/cpu_features/src/cpuinfo_x86.o
 endif
 
 ifneq (,$(filter i%86,$(CPUFEATURES_ARCH)))
- CPUFEATURES_OBJS += cpu_features/src/cpuinfo_x86.o
+ CPUFEATURES_OBJS += external/cpu_features/src/cpuinfo_x86.o
 endif
 
 ifneq (,$(findstring arm,$(CPUFEATURES_ARCH)))
- CPUFEATURES_OBJS += cpu_features/src/cpuinfo_arm.o
+ CPUFEATURES_OBJS += external/cpu_features/src/cpuinfo_arm.o
 endif
 
 ifneq (,$(findstring aarch64,$(CPUFEATURES_ARCH)))
- CPUFEATURES_OBJS += cpu_features/src/cpuinfo_aarch64.o
+ CPUFEATURES_OBJS += external/cpu_features/src/cpuinfo_aarch64.o
 endif
 
 $(CPUFEATURES_OBJS): override CFLAGS := $(CPUFEATURES_CFLAGS)
-$(CPUFEATURES_OBJS): override CPPFLAGS := -Icpu_features/include
+$(CPUFEATURES_OBJS): override CPPFLAGS := -Iexternal/cpu_features/include