e268fd0a02
There are two options: - WITH_INIT_ALL_ZERO: Zero all variables on the stack. - WITH_INIT_ALL_PATTERN: Initialize variables with well-defined patterns. The exact pattern are a compiler implementation detail and vary by type. They are somewhat documented in the LLVM commit message: https://reviews.llvm.org/rL349442 I've used WITH_INIT_ALL_* to match Microsoft's InitAll feature rather than naming them after the LLVM specific compiler flags. In a range of consumer products, options like these are used in both debug and production builds with debugs builds using patterns (intended to provoke crashes on use of uninitialized values) and production using zeros (deemed more likely to lead to harmless misbehavior or NULL-pointer dereferences). Reviewed by: emaste Obtained from: CheriBSD Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D27131
118 lines
3.2 KiB
Makefile
118 lines
3.2 KiB
Makefile
# $FreeBSD$
|
|
#
|
|
# Option file for src builds.
|
|
#
|
|
# Users define WITH_FOO and WITHOUT_FOO on the command line or in /etc/src.conf
|
|
# and /etc/make.conf files. These translate in the build system to MK_FOO={yes,no}
|
|
# with (usually) sensible defaults.
|
|
#
|
|
# Makefiles must include bsd.opts.mk after defining specific MK_FOO options that
|
|
# are applicable for that Makefile (typically there are none, but sometimes there
|
|
# are exceptions). Recursive makes usually add MK_FOO=no for options that they wish
|
|
# to omit from that make.
|
|
#
|
|
# Makefiles must include bsd.mkopt.mk before they test the value of any MK_FOO
|
|
# variable.
|
|
#
|
|
# Makefiles may also assume that this file is included by bsd.own.mk should it
|
|
# need variables defined there prior to the end of the Makefile where
|
|
# bsd.{subdir,lib.bin}.mk is traditionally included.
|
|
#
|
|
# The old-style YES_FOO and NO_FOO are being phased out. No new instances of them
|
|
# should be added. Old instances should be removed since they were just to
|
|
# bridge the gap between FreeBSD 4 and FreeBSD 5.
|
|
#
|
|
# Makefiles should never test WITH_FOO or WITHOUT_FOO directly (although an
|
|
# exception is made for _WITHOUT_SRCONF which turns off this mechanism
|
|
# completely).
|
|
#
|
|
|
|
.if !target(__<bsd.opts.mk>__)
|
|
__<bsd.opts.mk>__:
|
|
|
|
.if !defined(_WITHOUT_SRCCONF)
|
|
#
|
|
# Define MK_* variables (which are either "yes" or "no") for users
|
|
# to set via WITH_*/WITHOUT_* in /etc/src.conf and override in the
|
|
# make(1) environment.
|
|
# These should be tested with `== "no"' or `!= "no"' in makefiles.
|
|
# The NO_* variables should only be set by makefiles for variables
|
|
# that haven't been converted over.
|
|
#
|
|
|
|
# Only these options are used by bsd.*.mk. KERBEROS and OPENSSH are
|
|
# unfortunately needed to support statically linking the entire
|
|
# tree. su(1) wouldn't link since it depends on PAM which depends on
|
|
# ssh libraries when building with OPENSSH, and likewise for KERBEROS.
|
|
|
|
# All other variables used to build /usr/src live in src.opts.mk
|
|
# and variables from both files are documented in src.conf(5).
|
|
|
|
__DEFAULT_YES_OPTIONS = \
|
|
ASSERT_DEBUG \
|
|
DEBUG_FILES \
|
|
DOCCOMPRESS \
|
|
INCLUDES \
|
|
INSTALLLIB \
|
|
KERBEROS \
|
|
MAKE_CHECK_USE_SANDBOX \
|
|
MAN \
|
|
MANCOMPRESS \
|
|
NIS \
|
|
NLS \
|
|
OPENSSH \
|
|
PROFILE \
|
|
SSP \
|
|
TESTS \
|
|
TOOLCHAIN \
|
|
WARNS
|
|
|
|
__DEFAULT_NO_OPTIONS = \
|
|
BIND_NOW \
|
|
CCACHE_BUILD \
|
|
CTF \
|
|
INIT_ALL_PATTERN \
|
|
INIT_ALL_ZERO \
|
|
INSTALL_AS_USER \
|
|
PIE \
|
|
RETPOLINE \
|
|
STALE_STAGED
|
|
|
|
__DEFAULT_DEPENDENT_OPTIONS = \
|
|
MAKE_CHECK_USE_SANDBOX/TESTS \
|
|
STAGING_MAN/STAGING \
|
|
STAGING_PROG/STAGING \
|
|
STALE_STAGED/STAGING \
|
|
|
|
|
|
.include <bsd.mkopt.mk>
|
|
|
|
.if ${MK_INIT_ALL_PATTERN} == "yes" && ${MK_INIT_ALL_ZERO} == "yes"
|
|
.error WITH_INIT_ALL_PATTERN and WITH_INIT_ALL_ZERO are mutually exclusive.
|
|
.endif
|
|
|
|
#
|
|
# Supported NO_* options (if defined, MK_* will be forced to "no",
|
|
# regardless of user's setting).
|
|
#
|
|
# These are transitional and will disappaer in the FreeBSD 12.
|
|
#
|
|
.for var in \
|
|
CTF \
|
|
DEBUG_FILES \
|
|
INSTALLLIB \
|
|
MAN \
|
|
PROFILE \
|
|
WARNS
|
|
.if defined(NO_${var})
|
|
.error "NO_${var} is defined, but deprecated. Please use MK_${var}=no instead."
|
|
MK_${var}:=no
|
|
.endif
|
|
.endfor
|
|
|
|
.include <bsd.cpu.mk>
|
|
|
|
.endif # !_WITHOUT_SRCCONF
|
|
|
|
.endif
|