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 at gmail dot com>]

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

Also reported is build failure on debian [1], where bootstrap dies
with ELF_LITERAL truncation:

libbackend.a(tree-vect-generic.o): In function `gimple_statement_structure':
/ÂPKGBUILDDIRÂ/build/gcc/../../src/gcc/gimple.h:1572:(.text+0x2f4):
relocation truncated to fit: ELF_LITERAL against `.text'
libbackend.a(tree-vect-generic.o): In function `gimple_has_ops':
/ÂPKGBUILDDIRÂ/build/gcc/../../src/gcc/gimple.h:1846:(.text+0x38c):
relocation truncated to fit: ELF_LITERAL against `.text'
/ÂPKGBUILDDIRÂ/build/gcc/../../src/gcc/gimple.h:1846:(.text+0x3ac):
relocation truncated to fit: ELF_LITERAL against `.text'

[1] https://sourceware.org/bugzilla/show_bug.cgi?id=5276#c13

Uros.