> On 3/04/2012, at 2:16 AM, Ilya Enkovich wrote: > >>> >>> The point is that one can build a toolchain for i686-linux-gnu that will >>> support both 32-bit and 64-bit multilibs. The 32-bit multilib will be used >>> by default, and compilation for 64-bit user-space can be requested with >>> -m64 option. Even though Android is not supported for -m64, such a >>> toolchain can support Android as a additional "-m32 -mandroid" multilib. >>> I.e., the toolchain will have three multilibs in total: "-m32" (default), >>> "-m64" and "-m32 -mandroid". I386/linux64.h will be picked up for such a >>> toolchain, even though by default it would compile for 32-bit target. Does >>> this clear up things? >>> >> >> I think I see your point. And it seems to make all this work I'll also >> have to rename i386/gnu-user.h into i386/gnu-user32.h and create >> i386/gnu-user.h with common definitions to be included by >> gnu-user[32|64].h. Otherwise I wont be able to use some definitions >> (i.e. GNU_USER_TARGET_LINK_SPEC and GNU_USER_TARGET_MATHFILE_SPEC) in >> linux64.h. Right? > > It's simpler that you think. The target headers ($tm_file in config.gcc -- > gnu-user.h, linux*.h, etc. in this case) are all included into tm.h, which > serves as proxy to all those headers. All definitions made in preceding > headers are available in subsequent headers. So, given that i386/gnu-user*.h > precedes i386/linux*.h in config.gcc's $tm_file, you only need to touch > linux*.h. > > Thanks, > > -- > Maxim Kuvyrkov > CodeSourcery / Mentor Graphics >
Hi, I prepared version with common linux.h and gnu-user.h. Does it look OK? Bootstrapped and checked on linux-x86_64. Thanks, Ilya --- 2012-04-03 Enkovich Ilya <ilya.enkov...@intel.com> * config/i386/linux.h: Renamed to ... * config/i386/linux32.h: ... this. * config/i386/gnu-user.h: Renamed to ... * config/i386/gnu-user32.h: ... this. (CPP_SPEC): Remove. (CC1_SPEC): Remove. (ENDFILE_SPEC): Remove. (GNU_USER_TARGET_LINK_SPEC): New. (LINK_SPEC): Use GNU_USER_TARGET_LINK_SPEC. * config.gcc: Rename i386/linux.h to i386/linux32.h and i386/gnu-user.h to i386/gnu-user32.h. * config/i386/linux.h: New. * config/i386/gnu-user.h: New. * config/i386/linux64.h: Include i386/linux.h. * config/i386/gnu-user64.h: Include i386/gnu-user.h (CPP_SPEC): Remove. (CC1_SPEC): Remove. (ENDFILE_SPEC): Remove. (GNU_USER_TARGET_LINK_SPEC): New. (LINK_SPEC): Use GNU_USER_TARGET_LINK_SPEC.
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