Re: hysterical kernel config files

["William D. Jones" <thor0505%comcast.net@localhost>]

Just saw this. Essentially, from what I can gather from old mailing list 
posts, the historical kernel configs (and -Os) are not supposed to actually 
used except when there's no other option. I have to use an INSTALL_TINY 
kernel (which means uncommenting the code in the tree to actually build 
those floppy images) for my 486 with 20MB RAM, because the CD drive uses the 
old Matsushita CD interface which can't boot :P.

Add the following line to your mk.conf (if you're on a non-NetBSD machine, 
make sure build.sh knows about the location to this file), and it should fix 
the problems:
COPTS=-Os -Wno-error=uninitialized -Wno-error=maybe-uninitialized

-----Original Message----- 
From: Patrick Welche
Sent: Monday, November 24, 2014 12:38 PM
To: current-users%netbsd.org@localhost
Subject: hysterical kernel config files

Musings from some historical kernel config files.

I see that INSTALL kernels no longer use -Os for smaller compiled code.
(INSTALL_TINY and INSTALL_FLOPPY still do but don't include GENERIC)
With -Os, drmkms fails with

--- drm_scatter.o ---
../../../../external/bsd/drm2/drm/drm_scatter.c: In function 'drm_sg_alloc':
../../../../external/bsd/drm2/drm/drm_scatter.c:83:10: error: 'sg' may be 
used uninitialized in this function [-Werror=maybe-uninitialized]
 dev->sg = sg;
         ^
cc1: all warnings being treated as errors



options(4) mentions

    options MALLOC_NOINLINE
    Time critical fixed size memory allocation is performed with MALLOC() 
and
    FREE().  Normally these expand to inline code, but with MALLOC_NOINLINE
    these call the normal malloc() and free() functions.  Useful for 
install
    media kernels, small memory systems and embedded systems.

but AFAICT nothing uses MALLOC_NOINLINE - obsolete?

Cheers,

Patrick

--
William D. Jones
Rowan University | ECE | 2012
Member IEEE
Member Tau Beta Pi
thor0505%comcast.net@localhost
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