[src/trunk]: src/lib Disable sanitizers for libm and librt

[kamil <kamil%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ee99c34faaf0
branches:  trunk
changeset: 323379:ee99c34faaf0
user:      kamil <kamil%NetBSD.org@localhost>
date:      Wed Jun 13 08:19:36 2018 +0000

description:
Disable sanitizers for libm and librt

The sanitizers are designed to use pristine OS versions of these libraries,
install interceptors for public symbols in them and link with them in every
sanitized executable.

Having unmodified base libraries (c, m, rt, pthread) also makes the system
usable with programs linking with them and without sanitization, as there
are no fatal issues during the resolving of missing symbols.

The remaining libraries like libutil, libintl etc are prebuilt with
sanitization and all their users in the MKSANITIZER=yes distribution are
required to use the same sanitizer.

libc and libpthread are already marked with the NOSANITIZER flag.

diffstat:

 lib/libm/Makefile  |  4 +++-
 lib/librt/Makefile |  4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diffs (31 lines):

diff -r 238de4f83301 -r ee99c34faaf0 lib/libm/Makefile
--- a/lib/libm/Makefile Wed Jun 13 05:26:12 2018 +0000
+++ b/lib/libm/Makefile Wed Jun 13 08:19:36 2018 +0000
@@ -1,4 +1,4 @@
-#  $NetBSD: Makefile,v 1.203 2017/09/26 16:01:59 maya Exp $
+#  $NetBSD: Makefile,v 1.204 2018/06/13 08:19:36 kamil Exp $
 #
 #  @(#)Makefile 5.1beta 93/09/24
 #
@@ -13,6 +13,8 @@
 #
 #
 
+NOSANITIZER=           # defined
+
 #
 # There are two options in making libm at fdlibm compile time:
 #      _IEEE_LIBM      --- IEEE libm; smaller, and somewhat faster
diff -r 238de4f83301 -r ee99c34faaf0 lib/librt/Makefile
--- a/lib/librt/Makefile        Wed Jun 13 05:26:12 2018 +0000
+++ b/lib/librt/Makefile        Wed Jun 13 08:19:36 2018 +0000
@@ -1,6 +1,8 @@
-#      $NetBSD: Makefile,v 1.20 2016/08/05 13:03:13 christos Exp $
+#      $NetBSD: Makefile,v 1.21 2018/06/13 08:19:36 kamil Exp $
 #
 
+NOSANITIZER=   # defined
+
 .include <bsd.own.mk>
 
 WARNS?=        5