svn commit: r338861 - head/lib/libc

[Xin Li]

On 9/21/18 10:49, Ed Maste wrote:
> Author: emaste
> Date: Fri Sep 21 17:49:37 2018
> New Revision: 338861
> URL: https://svnweb.freebsd.org/changeset/base/338861
> 
> Log:
>   libc: require ifunc-capable linker for amd64/i386
>   
>   We expect to introduce optimized libc routines in the near future,
>   which requires use of a linker that supports ifuncs.
>   
>   Approved by:	re (gjb, kib)
>   Sponsored by:   The FreeBSD Foundation
> 
> Modified:
>   head/lib/libc/Makefile
> 
> Modified: head/lib/libc/Makefile
> ==============================================================================
> --- head/lib/libc/Makefile	Fri Sep 21 17:44:05 2018	(r338860)
> +++ head/lib/libc/Makefile	Fri Sep 21 17:49:37 2018	(r338861)
> @@ -21,6 +21,11 @@ LIBC_ARCH=${MACHINE_ARCH}
>  LIBC_ARCH=${MACHINE_CPUARCH}
>  .endif
>  
> +.if (${LIBC_ARCH} == amd64 || ${LIBC_ARCH} == i386) && \
> +    defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc} == ""
> +.error ${LIBC_ARCH} libc requires linker ifunc support
> +.endif
> +
>  # All library objects contain FreeBSD revision strings by default; they may be
>  # excluded as a space-saving measure.  To produce a library that does
>  # not contain these strings, add -DSTRIP_FBSDID (see <sys/cdefs.h>) to CFLAGS

It seems that this would break bootstraping from a FreeBSD -CURRENT
before ifunc?

Cheers,


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