parsers: dynamically register parsers

Currently, we require all parsers to be defined in an array in
parsers.c.

This change removes this requirement, by introducting a
register_parser() macro, which adds a constructor to register the parser
with the core parser infrastructure.

Because each parser no longer resolves an undefined symbol, we need to
use a `ld -r` object for libparser, instead of using libtool, which
creates a .a (and hence has no parsers included).

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/discover/kboot-parser.c b/discover/kboot-parser.c
index e602dc4..884658e 100644
--- a/discover/kboot-parser.c
+++ b/discover/kboot-parser.c
@@ -157,9 +157,11 @@ static int kboot_parse(struct discover_context *dc, char *buf, int len)
 	return 1;
 }
 
-struct parser __kboot_parser = {
+static struct parser kboot_parser = {
 	.name			= "kboot",
 	.parse			= kboot_parse,
 	.filenames		= kboot_conf_files,
 	.resolve_resource	= resolve_devpath_resource,
 };
+
+register_parser(kboot_parser);