# /site/etc/make.conf.README
# Installed by /site/etc/Makefile to
#	http://www.berklix.com/~jhs/src/bsd/fixes/FreeBSD/src/jhs/etc/
# See also ./make.conf

2017Q2 ports: 
	USE_OPENSSL  removed 

	Support for 9.3, 10.1 and 10.2 was removed, so the ports
	tree now requires defining ALLOW_UNSUPPORTED_SYSTEM on
	unsupported FreeBSD releases to
	... Mk/bsd.port.mk

Syntax example:
      .if ${.CURDIR:M/usr/ports*}
      CFLAGS= -O -pipe -DBERKLIX_SUBDIR=yes
      .endif

To: hackers@freebsd._ERASE_.org
Subject: COPTFLAGS without -O in /etc/make.conf breaks kernel make

Here's a weirdness in 4.2-RELEASE kernel generation:
  - Compiling a GENERIC kernel _Without -O optimiser causes a broken make !
  - Compiling a GENERIC kernel _With_ -O optimiser compiles OK.

Seems weird - perhaps indicative of a problem elsewhere in FreeBSD ?  
(Optimisers occasionally break things, but don't normally _fix_ things !)
Can anyone confirm the observation / comment / explain please ?

If you wonder why you haven't seen this so far:
- Default 4.2 systems compile kernel with -O
- I noticed it while experimentally adding "-pipe" to make variables.

How to test:
 Breaks: 	echo "COPTFLAGS= -DHalloFromMakeDotConf" >> /etc/make.conf
 Breaks:	echo "COPTFLAGS=" >> /etc/make.conf
 OK:		echo "COPTFLAGS= -DHalloFromMakeDotConf -O" >> /etc/make.conf
 OK:		echo "COPTFLAGS=-O" >> /etc/make.conf
 OK:	grep -v COPTFLAGS /etc/make.conf > /tmp/co;cp /tmp/co /etc/make.conf
Followed By:
  cd /sys/i386/conf;config -r GENERIC
  cd /sys/compile/GENERIC;make depend;make atomic.o # atomic.o for faster test

Breakage:
 cc -c -DHalloFromMakeDotConf -Wall -Wredundant-decls -Wnested-externs
 -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline
 -Wcast-qual  -fformat-extensions -ansi  -nostdinc -I- -I. -I../..
 -I../../../include -I/usr/include  -D_KERNEL -include opt_global.h
 -elf  -mpreferred-stack-boundary=2 -fomit-frame-pointer
 ../../i386/i386/atomic.c
 In file included from ../../i386/i386/atomic.c:47:
 machine/atomic.h: In function `atomic_set_char':
 machine/atomic.h:106: inconsistent operand constraints in an `asm'
 machine/atomic.h: In function `atomic_clear_char':
 machine/atomic.h:107: inconsistent operand constraints in an `asm'

----------
WRKDIRPREFIX="/usr/obj/ports"         # To allow a quicker clean.