On Thu, Jun 4, 2020 at 2:59 AM Arnd Bergmann <a...@arndb.de> wrote: > > On Wed, Jun 3, 2020 at 7:04 PM Rich Felker <dal...@libc.org> wrote: > > On Wed, Jun 03, 2020 at 08:49:54AM -0500, Rob Landley wrote: > > > make ARCH=$i distclean defconfig headers_install \ > > > > > > On the bright side, the resulting fruitbasket.tar.xz is 1.5 megabytes. The > > > downside is I have no idea how broken the resulting header files are > > > after this > > > error-fest: > > > > > > alpha > > > arc > > > gcc: error: unrecognized command line option ‘-mmedium-calls’ > > > gcc: error: unrecognized command line option ‘-mno-sdata’; did you mean > > > ‘-fno-stats’? > > > gcc: error: unrecognized command line option ‘-mmedium-calls’ > > > gcc: error: unrecognized command line option ‘-mno-sdata’; did you mean > > > ‘-fno-stats’? > > > [...] > > > > Uhg. Surely there should be some fix for whatever mistaken dep is > > behind this? Headers shouldn't actually depend on any config/compiler > > output, should they?? > > The first one of the two comes from "make defconfig", which definitely needs > a working $TARGET compiler, but isn't actually needed before > "make headers_install" as I just checked. > > > Or is that machinery somehow involved in > > generating the syscall lists and similar? > > The syscall list for ARC is still not generated (that's on my todo list), but > something does call it even for "make headers_install". > > What it does is to set Makefile variables such as > > CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) > and trying out all kinds of gcc options that may or may not be supported > such as "$(call cc-option,-fno-tree-loop-im)". > > Setting CC=: avoids this, like > > make -s CC=: ARCH=$i headers_install INSTALL_HDR_PATH="$PWD/fruitbasket/$i" > > Arnd
You can do headers_install without the .config file. 'make defconfig' is unneeded. headers_install should be independent of $(CC) too. linux-next has some progress about this. You can get clean headers_install without CROSS_COMPILE for parisc, h8300, hexagon. You still get warnings for ia64 and arc. Our goal is to not require $(CC) for non-dot-config target like 'make headers_install', 'make help', etc. -- Best Regards Masahiro Yamada
