tools/mksymtab.sh: Support adding additional symbols that are not in undefined list
e.g. For CHRE dynamic nanoapps, pre-saving symbols that may be used later, no need recompiling.
Test: (unique & sorted)
$ nm ./hello_world.o | grep " U "
U __aeabi_unwind_cpp_pr1
U chreGetTime
U chreGetVersion
U chreLog
U __stack_chk_fail
U __stack_chk_guard
$ cat additional.txt -n
1 test_symbol
2 test_symbol
$ /PATH/TO/APPS/tools/mksymtab.sh ./hello_world.o MY_PREFIX -a additional.txt
#include <nuttx/compiler.h>
#include <nuttx/symtab.h>
extern void *__aeabi_unwind_cpp_pr1;
extern void *__stack_chk_fail;
extern void *__stack_chk_guard;
extern void *chreGetTime;
extern void *chreGetVersion;
extern void *chreLog;
extern void *test_symbol;
const struct symtab_s MY_PREFIX_exports[] =
{
{"__aeabi_unwind_cpp_pr1", &__aeabi_unwind_cpp_pr1},
{"__stack_chk_fail", &__stack_chk_fail},
{"__stack_chk_guard", &__stack_chk_guard},
{"chreGetTime", &chreGetTime},
{"chreGetVersion", &chreGetVersion},
{"chreLog", &chreLog},
{"test_symbol", &test_symbol},
};
const int MY_PREFIX_nexports = sizeof(MY_PREFIX_exports) / sizeof(struct symtab_s);
Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
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