Messages in this thread | | | Subject | Re: modversion.h improvement suggestion | Date | Mon, 06 May 2002 23:03:34 +0200 | From | Olaf Titz <> |
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> The build instructions for third party modules should say something > like > > If your kernel was built with CONFIG_MODVERSIONS=y then add these > flags to the build for this module > > -DMODVERSIONS -include kernel_source_tree/linux/modversions.h
or even better, pick up the _complete_ compilation rule from the kernel Makefile, since this is (unfortunately) by now the only way to get all compiler options right.
I do it this way (in a configure.in for an external module): KSRC is the kernel source location.
cp $KSRC/Makefile conftest.make echo -e "conftest.CC:" >>conftest.make echo -e "\t@echo \$(CC)" >>conftest.make echo -e "conftest.CFLAGS:" >>conftest.make echo -e "\t@echo \$(CFLAGS) \$(MODFLAGS)" >>conftest.make here=`pwd` NKCC=`cd $KSRC; $MAKE -s -f $here/conftest.make conftest.CC` NKCFLAGS=`cd $KSRC; $MAKE -s -f $here/conftest.make conftest.CFLAGS`
i.e. copy the main Makefile, add a few rules to just echo the flags, and then invoke it in the original place (since it depends on that). We should really have a more elegant way to extract this info from the main Makefile.
> In any case, modversions.h will disappear in kbuild 2.5.
which leaves hope this issue will be addressed...
Olaf
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