[PATCH] Makefile: be more robust against toolchains without syscalls

[Peter Stuge]

Michael Grzeschik wrote:
> Several toolchains are missing syscalls provided by the libc used. For example,
> if the newlib was build with the configure flag "--disable-newlib-supplied-syscalls".
> To prevent the configure check for things like "_exit" in osmocom
> the CFLAGS+="-nostartfiles -nodefaultlibs" helps a lot.
> 
> Signed-off-by: Michael Grzeschik <mgr at xviews.de>
> Acked-by: Wolfram Sang <wolfram at the-dreams.de>

Acked-by: Peter Stuge <peter at stuge.se>