[OE-core] syslinux + gcc 5.2 build error

[Khem Raj]

> On Oct 14, 2015, at 2:38 PM, Andre McCurdy <armccurdy at gmail.com> wrote:
> 
> I'm seeing what looks like a gcc bug when building syslinux with
> certain combinations of TUNE_CCARGS. A specific combination which
> fails is:
> 
>  TUNE_CCARGS = " -m32 -march=core2 -mtune=core2 -msse3 -mfpmath=sse
> -fschedule-insns”


and why would you use -fschedule-insns on something like ia32 with so few general purpose regs
at disposal ?
applying any insn schedule opts before machine registers are assigned may not always work.



> 
> ( ie the default flags set by tune-core2.inc with one additional flag:
> -fschedule-insns )
> 
> Problem is only seen with gcc 5.2
> 
> Compiler error is:
> 
> i686-rdk-linux-gcc -m32 -march=core2 -mtune=core2 -msse3 -mfpmath=sse
> -fschedule-insns
> --sysroot=/home/andre/rdk/rdk-master/build-vbox32/tmp/sysroots/vbox32
> -O2 -pipe -g -feliminate-unused-debug-types -fstack-protector-strong
> -D_FORTIFY_SOURCE=2 -MT zlib/deflate.o -MD -Os -march=i386
> -falign-functions=0 -falign-jumps=0 -falign-labels=0 -ffast-math
> -fomit-frame-pointer -std=gnu99 -m32 -mpreferred-stack-boundary=2
> -fno-stack-protector -fwrapv -freg-struct-return -fPIC -fno-exceptions
> -fno-asynchronous-unwind-tables -fno-strict-aliasing
> -falign-functions=0 -falign-jumps=0 -falign-labels=0 -falign-loops=0
> -g -D__COM32__ -D__FIRMWARE_BIOS__ -nostdinc -iwithprefix include -I.
> -I/home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/com32/lib/sys
> -I/home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/com32/lib/../include
> -I/home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/com32/include/sys
> -I/home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/core/include
> -I/home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/com32/lib/
> -I/home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/com32/lib/sys/module
> -I/home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/bios/com32/lib//../..
> -W -Wall -Wstrict-prototypes -Wpointer-arith -Wwrite-strings
> -Wstrict-prototypes -Winline -DDYNAMIC_CRC_TABLE -DPNG_NO_CONSOLE_IO
> -DPNG_NO_WRITE_SUPPORTED -DPNG_NO_MNG_FEATURES -DPNG_NO_READ_tIME
> -DPNG_NO_WRITE_tIME -mregparm=3 -DREGPARM=3 -c -o zlib/deflate.o
> /home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/com32/lib/zlib/deflate.c
> 
> /home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/com32/lib/zlib/deflate.c:
> In function 'deflate':
> /home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/com32/lib/zlib/deflate.c:892:1:
> error: unable to find a register to spill
> }
> ^
> /home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/com32/lib/zlib/deflate.c:892:1:
> error: this is the insn:
> (insn 745 1859 1860 94 (set (reg:QI 995)
>        (mem/j:QI (plus:SI (reg/v/f:SI 965 [orig:676 strm ] [676])
>                (const_int 48 [0x30])) [0 strm_54(D)->adler+0 S1
> A32])) /home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/com32/lib/zlib/deflate.c:775
> 86 {*movqi_internal}
>     (nil))
> /home/andre/rdk/rdk-master/build-vbox32/tmp/work/core2-32-rdk-linux/syslinux/6.03-r0/syslinux-6.03/com32/lib/zlib/deflate.c:892:
> confused by earlier errors, bailing out
> --
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