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libc: require ifunc-capable linker for amd64/i386

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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
This commit is contained in:
emaste 2018-09-21 17:49:37 +00:00
parent 7c1dc0fa1e
commit ef8030831e
1 changed files with 5 additions and 0 deletions
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5
lib/libc/Makefile
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@ -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