Warner Losh 3ad1a09169 Rather than require a makeoptions DEBUG to get debug correct, ... add it in kern.mk, but only if we're using clang. While this option is supported by both clang and gcc, in the future there may be changes to clang which change the defaults that require a tweak to build our kernel such that other tools in our tree will work. Set a good example by forcing -gdwarf-2 only for clang builds, and only if the user hasn't specified another dwarf level already. Update UPDATING to reflect the changed state of affairs. This also keeps us from having to update all the ARM kernels to add this, and also keeps us from in the future having to update all the MIPS kernels and is one less place the user will have to know to do something special for clang and one less thing developers will need to do when moving an architecture to clang. Reviewed by: ian@ MFC after: 1 week		2014-03-25 22:08:31 +00:00
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DEFAULTS	Disable the option VFS_ALLOW_NONMPSAFE by default on all the supported	2012-03-06 20:01:25 +00:00
GENERIC	Rather than require a makeoptions DEBUG to get debug correct,	2014-03-25 22:08:31 +00:00
GENERIC.hints	Provide wbwd(4), a driver for the watchdog timer found on various	2012-03-06 18:44:52 +00:00
Makefile
NOTES	In kernel config files, it is supposed to be 'options<space><tab>' not	2014-03-18 14:41:18 +00:00
PAE	Retire the nve(4) driver; nfe(4) has been the default driver for NVIDIA	2014-02-16 12:22:43 +00:00
VT	Add VT kernel configuration to ease testing of vt(9), aka Newcons	2014-01-19 18:46:38 +00:00
XBOX	Back out r253779 & r253786.	2013-07-31 17:21:18 +00:00
XEN	Rather than require a makeoptions DEBUG to get debug correct,	2014-03-25 22:08:31 +00:00