The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/boot/Makefile.inc

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    1 # $FreeBSD: releng/11.1/sys/boot/Makefile.inc 319024 2017-05-28 01:08:46Z ngie $
    2 
    3 .include <bsd.own.mk>
    4 
    5 SSP_CFLAGS=
    6 
    7 .if ${MACHINE_CPUARCH} == "arm"
    8 # Do not generate movt/movw, because the relocation fixup for them does not
    9 # translate to the -Bsymbolic -pie format required by self_reloc() in loader(8).
   10 # Also, the fpu is not available in a standalone environment.
   11 .if ${COMPILER_VERSION} < 30800
   12 CFLAGS.clang+=  -mllvm -arm-use-movt=0
   13 .else
   14 CFLAGS.clang+=  -mno-movt
   15 .endif
   16 CFLAGS.clang+=  -mfpu=none
   17 .endif
   18 
   19 # The boot loader build uses dd status=none, where possible, for reproducible
   20 # build output (since performance varies from run to run). Trouble is that
   21 # option was recently (10.3) added to FreeBSD and is non-standard. Only use it
   22 # when this test succeeds rather than require dd to be a bootstrap tool.
   23 DD_NOSTATUS!=(dd status=none count=0 2> /dev/null && echo status=none) || true
   24 DD=dd ${DD_NOSTATUS}

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