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src.libnames.mk: add a comment explaining libssp_nonshared

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libssp_nonshared is a special case for (only) i386 and power*.  Add a
comment explaining why, based on the original commit message that added
it.

MFC after:	1 week
Fixes:		0f61170882 ("libssp_nonshared: use only on i386 and ppc")
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Ed Maste 2022-02-22 16:22:03 -05:00
parent 074bed4f48
commit 9aa786cbb5
1 changed files with 2 additions and 0 deletions
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share/mk/src.libnames.mk
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@ -392,6 +392,8 @@ _DP_ztest= geom m nvpair umem zpool pthread avl zfs_core spl zutil zfs uutil icp
# The libc dependencies are not strictly needed but are defined to make the
# assert happy.
_DP_c= compiler_rt
# Use libssp_nonshared only on i386 and power*. Other archs emit direct calls
# to __stack_chk_fail, not __stack_chk_fail_local provided by libssp_nonshared.
.if ${MK_SSP} != "no" && \
(${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH:Mpower*} != "")
_DP_c+= ssp_nonshared