[u-boot: v2013.04]
[Author: Bo Shen [email protected]]
1. Source Code
<common/cmd_version.c>
2. Usage
U-Boot > help version
version - print monitor version
U-boot > version
U-Boot 2013.04-00085-g5ed6f44
3. Source code go through
const char __weak version_string[] = U_BOOT_VERSION_STRING;
static int do_version(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
printf("\n%s\n", version_string);
#ifdef CC_VERSION_STRING
puts(CC_VERSION_STRING "\n");
#endif
#ifdef LD_VERSION_STRING
puts(LD_VERSION_STRING "\n");
#endif
#ifdef CONFIG_SYS_COREBOOT
printf("coreboot-%s (%s)\n", lib_sysinfo.version, lib_sysinfo.build);
#endif
return 0;
}
其中，U_BOOT_VERSION_STRING在<include/version.h>
定義：#define U_BOOT_VERSION_STRING U_BOOT_VERSION " (" U_BOOT_DATE " - " \
U_BOOT_TIME ")" CONFIG_IDENT_STRING
U_BOOT_VERSION, CC_VERSION_STRING, LD_VERSION_STRING: 定義在<include/generated/version_autogenerated.h>此文件通過名字可以看出是自動生成的。其具體生成代碼在頂層目錄中的Makefile裡面。代碼如下：
$(VERSION_FILE):
@mkdir -p $(dir $(VERSION_FILE))
@( localvers='$(shell $(TOPDIR)/tools/setlocalversion $(TOPDIR))' ; \
printf '#define PLAIN_VERSION "%s%s"\n' \
"$(U_BOOT_VERSION)" "$${localvers}" ; \
printf '#define U_BOOT_VERSION "U-Boot %s%s"\n' \
"$(U_BOOT_VERSION)" "$${localvers}" ; \
) > [email protected]
@( printf '#define CC_VERSION_STRING "%s"\n' \
'$(shell $(CC) --version | head -n 1)' )>> [email protected]
@( printf '#define LD_VERSION_STRING "%s"\n' \
'$(shell $(LD) -v | head -n 1)' )>> [email protected]
@cmp -s $@ [email protected] && rm -f [email protected] || mv -f [email protected] $@