This was prompted by the discussion about output directory support with
O=.
It seems sometimes we were pulling in system headers making testing
annoying and unreliable.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
---
Thomas Weißschuh (2):
      tools/nolibc: add stdarg.h header
      selftests/nolibc: use -nostdinc for nolibc-test

 tools/include/nolibc/Makefile           |  1 +
 tools/include/nolibc/stdarg.h           | 16 ++++++++++++++++
 tools/testing/selftests/nolibc/Makefile |  2 +-
 3 files changed, 18 insertions(+), 1 deletion(-)
---
base-commit: 556fb7131e03b0283672fb40f6dc2d151752aaa7
change-id: 20230827-nolibc-nostdinc-203908130d67

Best regards,
-- 
Thomas Weißschuh <linux@weissschuh.net>