Date: Wed, 9 Jan 2002 19:52:01 -0800 (PST) From: Mike Smith <msmith@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/conf kern.post.mk kern.pre.mk kmod.mk kmod_syms.awk Message-ID: <200201100352.g0A3q1r82647@freefall.freebsd.org>
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msmith 2002/01/09 19:52:01 PST
Modified files:
sys/conf kern.post.mk kern.pre.mk kmod.mk
Added files:
sys/conf kmod_syms.awk
Log:
Eliminate the use of commons in the kernel and modules,
simplifying the module linking process and eliminating the risks
associated with doubly-defined variables.
Cases where commons were legitimately used (detection of
compiled-in subsystems) have been converted to use sysinits, and
any new code should use this or an equivalent practice as a
matter of course.
Modules can override this behaviour by substituting -fno-common
out of ${CFLAGS} in cases where commons are necessary
(eg. third-party object modules). Commons will be resolved and
allocated space when the kld is linked as part of the module
build process, so they will not pose a risk to the kernel or
other modules.
Provide a mechanism for controlling the export of symbols from
the module namespace. The EXPORT_SYMS variable may be set in the
Makefile to NO (export no symbols), a list of symbols to export,
or the name of a file containing a newline-seperated list of
symbols to be exported. Non-exported symbols are converted to
local symbols. If EXPORT_SYMS is not set, all global symbols are
currently exported. This behaviour is expected to change (to
exporting no symbols) once modules have been converted.
Reviewed by: peter (in principle)
Obtained from: green (kmod_syms.awk)
Revision Changes Path
1.7 +1 -1 src/sys/conf/kern.post.mk
1.5 +2 -2 src/sys/conf/kern.pre.mk
1.110 +28 -1 src/sys/conf/kmod.mk
1.1 +27 -0 src/sys/conf/kmod_syms.awk (new)
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