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compilert-rt: build out-of-line LSE atomics helpers for aarch64
Both clang >= 12 and gcc >= 10.1 now default to -moutline-atomics for aarch64. This requires a bunch of helper functions in libcompiler_rt.a, to avoid link errors like "undefined symbol: __aarch64_ldadd8_acq_rel". (Note: of course you can use -mno-outline-atomics as a workaround too, but this would negate the potential performance benefit of the faster LSE instructions.) Bump __FreeBSD_version so ports maintainers can easily detect this. PR: 257392 MFC after: 2 weeks
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@ -19,6 +19,26 @@ MK_WERROR.gcc= no
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.include "Makefile.inc"
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# Out-of-line LSE atomics helpers for aarch64
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.if ${MACHINE_CPUARCH} == "aarch64"
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. for pat in cas swp ldadd ldclr ldeor ldset
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. for size in 1 2 4 8 16
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. for model in 1 2 3 4
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. if ${pat} == "cas" || ${size} != "16"
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# Use .for to define lse_name, to get a special loop-local variable
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. for lse_name in outline_atomic_${pat}${size}_${model}.S
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CLEANFILES+= ${lse_name}
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STATICOBJS+= ${lse_name:R}.o
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ACFLAGS.${lse_name}+= -DL_${pat} -DSIZE=${size} -DMODEL=${model} -I${CRTSRC}
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${lse_name}: lse.S
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ln -sf ${.ALLSRC} ${.TARGET}
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. endfor # lse_name
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. endif
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. endfor # model
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. endfor # size
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. endfor # pat
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.endif
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.if ${MK_INSTALLLIB} != "no"
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SYMLINKS+= libcompiler_rt.a ${LIBDIR}/libgcc.a
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.endif
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@ -76,7 +76,7 @@
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* cannot include sys/param.h and should only be updated here.
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*/
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#undef __FreeBSD_version
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#define __FreeBSD_version 1400026
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#define __FreeBSD_version 1400027
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/*
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* __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,
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