Re: [PATCH, alpha]: Fix PR/47230 [4.6/4.7 Regression] gcc fails to bootstrap on alpha in stage2 with "relocation truncated to fit: GPREL16 against ..."

[Uros Bizjak <ubizjak@gmail.com>]

On Fri, Feb 27, 2015 at 2:11 PM, Uros Bizjak <ubizjak@gmail.com> wrote:
> On Wed, Feb 25, 2015 at 8:18 PM, Richard Henderson <rth@redhat.com> wrote:
>> On 02/25/2015 09:02 AM, Uros Bizjak wrote:
>>> The patch was tested on alpha-linux-gnu and alphaev68-linux-gnu for
>>> all default languages plus obj-c++ and go.
>>>
>>> OK for mainline?
>>
>> Ok.  Thanks.
>
> Unfortunately, while "normal" bootstrap works OK with alpha-linux-gnu
> and alphaev68-linux-gnu, the bootstrap still fails when configured
> --with-build-config=bootstrap-lto:
>
> libbackend.a(tree-data-ref.o): In function `non_affine_dependence_relation':
> /space/uros/gcc-build-profiled/gcc/../../gcc-svn/trunk/gcc/tree-data-ref.c:1661:(.text+0x1b8):
> relocation truncated to fit: GPREL16 against symbol `dump_file'
> defined in .sbss section in libbackend.a(dumpfile.o)
> /space/uros/gcc-build-profiled/gcc/../../gcc-svn/trunk/gcc/tree-data-ref.c:1661:(.text+0x1d0):
> relocation truncated to fit: GPREL16 against symbol `dump_flags'
> defined in .sbss section in libbackend.a(dumpfile.o)
> libbackend.a(tree-data-ref.o): In function
> `compute_overlap_steps_for_affine_1_2':
> /space/uros/gcc-build-profiled/gcc/../../gcc-svn/trunk/gcc/tree-data-ref.c:2265:(.text+0x72a8):
> relocation truncated to fit: GPREL16 against symbol `dump_file'
> defined in .sbss section in libbackend.a(dumpfile.o)
> /space/uros/gcc-build-profiled/gcc/../../gcc-svn/trunk/gcc/tree-data-ref.c:2265:(.text+0x72b4):
> relocation truncated to fit: GPREL16 against symbol `dump_flags'
> defined in .sbss section in libbackend.a(dumpfile.o)
> libbackend.a(tree-data-ref.o): In function `analyze_siv_subscript_cst_affine':
> /space/uros/gcc-build-profiled/gcc/../../gcc-svn/trunk/gcc/tree-data-ref.c:1953:(.text+0x8a5c):
> relocation truncated to fit: GPREL16 against symbol `dump_file'
> defined in .sbss section in libbackend.a(dumpfile.o)
> /space/uros/gcc-build-profiled/gcc/../../gcc-svn/trunk/gcc/tree-data-ref.c:1953:(.text+0x8a74):
> relocation truncated to fit: GPREL16 against symbol `dump_flags'
> defined in .sbss section in libbackend.a(dumpfile.o)
> /space/uros/gcc-build-profiled/gcc/../../gcc-svn/trunk/gcc/tree-data-ref.c:1968:(.text+0x8bc0):
> relocation truncated to fit: GPREL16 against symbol `dump_file'
> defined in .sbss section in libbackend.a(dumpfile.o)
> /space/uros/gcc-build-profiled/gcc/../../gcc-svn/trunk/gcc/tree-data-ref.c:1968:(.text+0x8bd8):
> relocation truncated to fit: GPREL16 against symbol `dump_flags'
> defined in .sbss section in libbackend.a(dumpfile.o)
> /space/uros/gcc-build-profiled/gcc/../../gcc-svn/trunk/gcc/tree-data-ref.c:2049:(.text+0x8db8):
> relocation truncated to fit: GPREL16 against symbol `dump_file'
> defined in .sbss section in libbackend.a(dumpfile.o)
> /space/uros/gcc-build-profiled/gcc/../../gcc-svn/trunk/gcc/tree-data-ref.c:2049:(.text+0x8dd0):
> relocation truncated to fit: GPREL16 against symbol `dump_flags'
> defined in .sbss section in libbackend.a(dumpfile.o)
> libbackend.a(tree-data-ref.o): In function
> `dr_analyze_innermost(data_reference*, loop*)':
> /space/uros/gcc-build-profiled/gcc/../../gcc-svn/trunk/gcc/tree-data-ref.c:802:(.text+0xb54c):
> additional relocation overflows omitted from the output
> collect2: error: ld returned 1 exit status
> ../../gcc-svn/trunk/gcc/lto/Make-lang.in:71: recipe for target 'lto1' failed
> gmake[3]: *** [lto1] Error 1

I just noticed that this error is from LTO profiledbootstrap build,
with the failed command:

/space/uros/gcc-build-profiled/./prev-gcc/xg++
-B/space/uros/gcc-build-profiled/./prev-gcc/
-B/usr/local/alphaev68-unknown-linux-gnu/bin/ -nostdinc++
-B/space/uros/gcc-build-profiled/prev-alphaev68-unknown-linux-gnu/libstdc++-v3/src/.libs
-B/space/uros/gcc-build-profiled/prev-alphaev68-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
 -I/space/uros/gcc-build-profiled/prev-alphaev68-unknown-linux-gnu/libstdc++-v3/include/alphaev68-unknown-linux-gnu
 -I/space/uros/gcc-build-profiled/prev-alphaev68-unknown-linux-gnu/libstdc++-v3/include
 -I/space/uros/gcc-svn/trunk/libstdc++-v3/libsupc++
-L/space/uros/gcc-build-profiled/prev-alphaev68-unknown-linux-gnu/libstdc++-v3/src/.libs
-L/space/uros/gcc-build-profiled/prev-alphaev68-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
  -g -O2 -flto=jobserver -frandom-seed=1 -fprofile-generate -fno-lto
-DIN_GCC    -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W
-Wall -Wno-narrowing -Wwrite-strings -Wcast-qual
-Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings
-fno-common  -DHAVE_CONFIG_H -static-libstdc++ -static-libgcc  -o lto1
lto/lto-lang.o lto/lto.o lto/lto-object.o attribs.o
lto/lto-partition.o lto/lto-symtab.o libbackend.a main.o
tree-browser.o libcommon-target.a libcommon.a ../libcpp/libcpp.a
../libdecnumber/libdecnumber.a  -lmpc -lmpfr -lgmp -rdynamic -ldl
-L../zlib -lz libcommon.a ../libcpp/libcpp.a
../libbacktrace/.libs/libbacktrace.a ../libiberty/libiberty.a
../libdecnumber/libdecnumber.a

The LTO bootstrap works OK also without -Wl,--no-relax.

Uros.