Messages in this thread |  | | | Date | Tue, 2 Sep 2008 22:02:31 -0700 | | From | Andrew Morton <> | | Subject | Re: [genksyms patch 3/4] Track symbol checksum changes |
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On Mon, 21 Jul 2008 04:28:26 +0200 Andreas Gruenbacher <agruen@suse.de> wrote:
> Sometimes it is preferable to avoid changes of exported symbol checksums (to > avoid breaking externally provided modules). When a checksum change occurs, it > can be hard to figure out what caused this change: underlying types may have > changed, or additional type information may simply have become available at the > point where a symbol is exported. > > Add a new --reference option to genksyms which allows it to report why > checksums change, based on the type information dumps it creates with > the --dump-types flag. Genksyms will read in such a dump from a previous run, > and report which symbols have changed (and why). > > The behavior can be controlled for an entire build as follows: If > KBUILD_SYMTYPES is set, genksyms uses --dump-types to produce *.symtypes dump > files. If any *.symref files exist, those will be used as the reference to > check against. If KBUILD_PRESERVE is set, checksum changes will fail the > build.
This breaks `make M=...'
With i386 allmodconfig,
akpm2:/usr/src/25> make M=drivers/rtc
WARNING: Symbol version dump /usr/src/devel/Module.symvers is missing; modules will have no dependencies and modversions.
LD drivers/rtc/built-in.o CC [M] drivers/rtc/rtc-lib.o scripts/genksyms/genksyms: invalid option -- r Usage: genksyms [-adDTwqhV] > /path/to/.tmp_obj.ver -a, --arch Select architecture -d, --debug Increment the debug level (repeatable) -D, --dump Dump expanded symbol defs (for debugging only) -T, --dump-types file Dump expanded types into file (for debugging only) -w, --warnings Enable warnings -q, --quiet Disable warnings (default) -h, --help Print this message -V, --version Print the release version make[1]: *** [drivers/rtc/rtc-lib.o] Error 1 make: *** [_module_drivers/rtc] Error 2
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