make it easy to cross compile without Android source code

.gitignore

@@ -0,0 +1,4 @@
+*.o
+*.d
+*.a
+*.ro

Makefile.in

@@ -151,6 +151,7 @@ include $(srcdir)/util_lib/Makefile
 #
 include $(srcdir)/util/Makefile
 
+
 #
 # purgatory (code between kernels)
 #
@@ -161,11 +162,15 @@ include $(srcdir)/purgatory/Makefile
 #
 include $(srcdir)/kexec/Makefile
 
+# libfdt
+# include $(srcdir)/kexec/libfdt/Makefile
 
 # kdump (read a crashdump from memory)
 #
 include $(srcdir)/kdump/Makefile
 
+
+
 #
 # kexec_test (test program)
 #

README.md

@@ -0,0 +1,16 @@
+cross compile for arm or arm64 device
+
+1. Install arm-linux-gnueabi-gcc (i have test with gcc5) toolchain from the software center by apt-get or dnf what you like
+
+2. Install libz for arm-linux-gnueabi-gcc toolchain (need to use cross compile)
+
+3. Configure the kexectools
+
+    ```bash
+    root@sndnvaps-PC:/home/sndnvaps/kexec-tools# mkdir build_install
+    root@sndnvaps-PC:/home/sndnvaps/kexec-tools# CC=arm-linux-gnueabi-gcc-5 LDFLAGS="-static" CFLAGS="-I${PWD}/include -I${PWD}/util_lib/include -I${PWD}/kexec/arch/arm/include -I${PWD}/kexec/libfdt -I${PWD}/purgatory/include" LIBS="-lc" ./configure --host=arm-unknown-linux-gnueabi --prefix=/home/sndnvaps/kexec-tools/build_install
+
+    root@sndnvaps-PC:/home/sndnvaps/kexec-tools# make
+    root@sndnvaps-PC:/home/sndnvaps/kexec-tools# make install
+    ```
+ 4. you will got what you want in build_install/sbin   

include/config.h

@@ -41,7 +41,7 @@
 #define PACKAGE_BUGREPORT ""
 
 /* Define to the release date of this package */
-#define PACKAGE_DATE "29 July 2010"
+#define PACKAGE_DATE "15 July 2024"
 
 /* Define to the full name of this package. */
 #define PACKAGE_NAME "kexec-tools"

kdump/kdump.c

@@ -9,7 +9,9 @@
 #include <fcntl.h>
 #include <endian.h>
 #include <elf.h>
+#include <errno.h>
 
+extern char *strerror(int errnum);
 #if !defined(__BYTE_ORDER) || !defined(__LITTLE_ENDIAN) || !defined(__BIG_ENDIAN)
 #error Endian defines missing
 #endif

kexec/Makefile

@@ -62,6 +62,8 @@ include $(srcdir)/kexec/arch/s390/Makefile
 include $(srcdir)/kexec/arch/sh/Makefile
 include $(srcdir)/kexec/arch/x86_64/Makefile
 
+include $(srcdir)/kexec/libfdt/Makefile
+
 KEXEC_SRCS += $($(ARCH)_KEXEC_SRCS)
 
 KEXEC_OBJS = $(call objify, $(KEXEC_SRCS) $(KEXEC_GENERATED_SRCS))
@@ -75,11 +77,11 @@ KEXEC_MANPAGE = $(MANDIR)/man8/kexec.8
 
 -include $(KEXEC_DEPS)
 
-$(KEXEC): $(KEXEC_OBJS) $(UTIL_LIB)
+$(KEXEC): $(KEXEC_OBJS) $(UTIL_LIB) $(FDT_LIB)
 	@$(MKDIR) -p $(@D)
 	$(LINK.o) -o $@ $^ $(LIBS)
 
-$(KEXEC): CPPFLAGS+=-I$(srcdir)/kexec/arch/$(ARCH)/include
+$(KEXEC): CPPFLAGS+=-I$(srcdir)/kexec/arch/$(ARCH)/include -I$(srcdir)/kexec/libfdt
 
 $(KEXEC_MANPAGE): kexec/kexec.8
 	@$(MKDIR) -p     $(MANDIR)/man8

kexec/arch/arm/Makefile

@@ -6,10 +6,14 @@ arm_KEXEC_SRCS+= kexec/arch/arm/kexec-zImage-arm.c
 arm_KEXEC_SRCS+= kexec/arch/arm/kexec-uImage-arm.c
 arm_KEXEC_SRCS+= kexec/arch/arm/kexec-arm.c
 arm_KEXEC_SRCS+= kexec/arch/arm/crashdump-arm.c
+arm_KEXEC_SRCS+= kexec/arch/arm/mach-hammerhead.c
+arm_KEXEC_SRCS+= kexec/arch/arm/mach-m8.c
+arm_KEXEC_SRCS+= kexec/arch/arm/mach-shamu.c
+arm_KEXEC_SRCS+= kexec/arch/arm/mach.c
 arm_KEXEC_SRCS+= kexec/kexec-uImage.c
 
 arm_PHYS_TO_VIRT = kexec/arch/arm/phys_to_virt.c
 
 dist += kexec/arch/arm/Makefile $(arm_KEXEC_SRCS) $(arm_PHYS_TO_VIRT)	\
 	kexec/arch/arm/crashdump-arm.h kexec/arch/arm/kexec-arm.h	\
-	kexec/arch/arm/include/arch/options.h
+	kexec/arch/arm/mach.h kexec/arch/arm/include/arch/options.h

kexec/libfdt/Makefile

@@ -0,0 +1,23 @@
+# Makefile.libfdt
+#
+# This is not a complete Makefile of itself.  Instead, it is designed to
+# be easily embeddable into other systems of Makefiles.
+#
+
+LIBFDT_SRCS = kexec/libfdt/fdt.c kexec/libfdt/fdt_ro.c \
+	kexec/libfdt/fdt_wip.c kexec/libfdt/fdt_sw.c \
+	kexec/libfdt/fdt_rw.c kexec/libfdt/fdt_strerror.c
+
+LIBFDT_OBJS = $(call objify, $(LIBFDT_SRCS))
+
+FDT_LIB = libfdt.a
+
+dist += kexec/libfdt/Makefile	$(LIBFDT_SRCS)	\
+	kexec/libfdt/fdt.h kexec/libfdt/libfdt.h	\
+	kexec/libfdt/libfdt_env.h			\
+	kexec/libfdt/libfdt_internal.h
+clean += $(LIBFDT_OBJS)  $(FDT_LIB)
+
+$(FDT_LIB):$(LIBFDT_OBJS)
+	@$(MKDIR) -p $(@D)
+	$(AR) rs $(FDT_LIB) $(LIBFDT_OBJS)

kexec/libfdt/fdt_ro.c

@@ -55,6 +55,13 @@
 
 #include "libfdt_internal.h"
 
+
+#include <string.h>
+
+extern size_t strlen(const char *string);
+extern void *memchr(const void *str, int c, size_t n);
+
+
 static int _fdt_nodename_eq(const void *fdt, int offset,
 			    const char *s, int len)
 {

kexec/libfdt/fdt_rw.c

@@ -55,6 +55,11 @@
 
 #include "libfdt_internal.h"
 
+#include <string.h>
+
+extern void *memmove(void *str1, const void *str2, size_t n);
+extern size_t strlen(const char *string);
+
 static int _fdt_blocks_misordered(const void *fdt,
 			      int mem_rsv_size, int struct_size)
 {

kexec/libfdt/fdt_sw.c

@@ -55,6 +55,11 @@
 
 #include "libfdt_internal.h"
 
+#include <string.h>
+
+extern void *memmove(void *str1, const void *str2, size_t n);
+extern size_t strlen(const char *string);
+
 static int _fdt_sw_check_header(void *fdt)
 {
 	if (fdt_magic(fdt) != FDT_SW_MAGIC)