soc/software: remove libunwind

.gitmodules

@@ -7,6 +7,3 @@
 [submodule "litex/soc/software/compiler_rt"]
 	path = litex/soc/software/compiler_rt
 	url = http://llvm.org/git/compiler-rt.git
-[submodule "litex/soc/software/unwinder"]
-	path = litex/soc/software/unwinder
-	url = https://github.com/whitequark/libunwind

litex/soc/integration/builder.py

@@ -15,7 +15,6 @@ soc_software_packages = [
     "libcompiler_rt",
     "libdyld",
     "libnet",
-    "libunwind",
     "bios"
 ]
 

litex/soc/software/libunwind/Makefile

@@ -1,35 +0,0 @@
-include ../include/generated/variables.mak
-include $(SOC_DIRECTORY)/software/common.mak
-
-# lm32 is not supported
-ifeq ($(CPU),lm32)
-	ALL_TARGET=
-else
-	ALL_TARGET=libunwind.a
-endif
-
-COMMONFLAGS+=-integrated-as \
-	-I. -I$(SOC_DIRECTORY)/software/include/dyld/ -I$(SOC_DIRECTORY)/software/unwinder/include/ \
-	-I$(LIBUNWIND_DIRECTORY) \
-	-D__ELF__ -D__linux__ -D_LIBUNWIND_NO_HEAP -DNDEBUG
-
-OBJECTS=UnwindRegistersSave.o UnwindRegistersRestore.o UnwindLevel1.o libunwind.o
-
-all: $(ALL_TARGET)
-
-libunwind.a: $(OBJECTS)
-	$(AR) crs libunwind.a $(OBJECTS)
-
-%.o: $(SOC_DIRECTORY)/software/unwinder/src/%.cpp
-	$(compilexx)
-
-%.o: $(SOC_DIRECTORY)/software/unwinder/src/%.c
-	$(compile)
-
-%.o: $(SOC_DIRECTORY)/software/unwinder/src/%.S
-	$(assemble)
-
-.PHONY: clean
-
-clean:
-	$(RM) $(OBJECTS) libunwind.a .*~ *~

litex/soc/software/libunwind/__cxxabi_config.h

@@ -1 +0,0 @@
-#define LIBCXXABI_ARM_EHABI 0

litex/soc/software/unwinder

@@ -1 +0,0 @@
-Subproject commit 8b1196692d823a090a9879a695050baa7acc39ee