Changeset 2d53cfc in mainline for kernel/arch/amd64/Makefile.inc


Ignore:
Timestamp:
2012-11-08T10:25:15Z (12 years ago)
Author:
Martin Decky <martin@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
d1538a1
Parents:
94795812
Message:

amd64: remove the -fno-optimize-sibling-calls workaround, the GCC bug 48385 is fixed now

File:
1 edited

Legend:

Unmodified
Added
Removed

  • kernel/arch/amd64/Makefile.inc

    r94795812 r2d53cfc  
    3333
    3434FPU_NO_CFLAGS = -mno-sse -mno-sse2
    35 
    36 #
    37 # FIXME:
    38 #
    39 # The -fno-optimize-sibling-calls should be removed as soon as a bug
    40 # in GCC concerning the "large" memory model and tail call optimization
    41 # is fixed.
    42 #
    43 # When GCC generates a code for tail call, instead of generating ..
    44 #
    45 #   jmp *fnc
    46 #
    47 # it generates an assembly code with an illegal immediate prefix:
    48 #
    49 #   jmp *$fnc
    50 #
    51 # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48385 for reference.
    52 #
    53 
    54 CMN1 = -m64 -mcmodel=large -mno-red-zone -fno-unwind-tables -fno-omit-frame-pointer -fno-optimize-sibling-calls
     35CMN1 = -m64 -mcmodel=large -mno-red-zone -fno-unwind-tables -fno-omit-frame-pointer
    5536GCC_CFLAGS += $(CMN1)
    5637ICC_CFLAGS += $(CMN1)
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