On Wed, Jan 1, 2014 at 3:42 AM, Yann E. MORIN <yann.morin.1998@xxxxxxx> wrote: > > On 2013-12-31 16:16 -0800, Linus Torvalds spake thusly: >> >> What we really really want to do is to have some way to add config >> options based on shell scripts and compiler support. That would also >> get rid of a lot of Makefile trickery etc. >> >> Then we could just make CC_STACKPROTECTOR_STRONG depend on >> CC_SUPPORTS_STACKPROTECTOR_STRONG or whatever. > > Sam Ravnborg suggested somethink along those lines back in July: > http://marc.info/?l=linux-kbuild&m=137399785206527&w=2 > and a tentative implementation: > http://marc.info/?l=linux-kbuild&m=137409581406434&w=2 Ack. Looks good to me. I've wanted this for a long time for other reasons, we should finally just do it. That said, we should make sure that the shell execution thing gets access to $(CC) etc variables that we have in > Basically, that would give something like: > > config CC_SUPPORTS_STACKPROTECTOR_STRONG > bool > option exec="some/script/to/test-gcc -fstack-protector-strong" For the compiler options, it would hopefully be sufficient to just do something like config CC_SUPPORTS_STACKPROTECTOR_STRONG bool option exec="$CC -fstack-protector-strong -c empty.c" or something like that. No? Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
