add infrastructure to record and report the version of libc.so
this is still experimental and subject to change. for git checkouts,
an attempt is made to record the exact revision to aid in bug reports
and debugging. no version information is recorded in the static libc.a
or binaries it's linked into.
diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c
index 174df57..27d92f2 100644
--- a/src/ldso/dynlink.c
+++ b/src/ldso/dynlink.c
@@ -93,6 +93,8 @@
void *__install_initial_tls(void *);
void __init_libc(char **, char *);
+const char *__libc_get_version(void);
+
static struct dso *head, *tail, *ldso, *fini_head;
static char *env_path, *sys_path;
static unsigned long long gencnt;
@@ -1040,8 +1042,11 @@
*argv++ = (void *)-1;
if (argv[0] && !strcmp(argv[0], "--")) *argv++ = (void *)-1;
if (!argv[0]) {
- dprintf(2, "musl libc/dynamic program loader\n");
- dprintf(2, "usage: %s pathname%s\n", ldname,
+ dprintf(2, "musl libc\n"
+ "Version %s\n"
+ "Dynamic Program Loader\n"
+ "Usage: %s [--] pathname%s\n",
+ __libc_get_version(), ldname,
ldd_mode ? "" : " [args]");
_exit(1);
}