[Bug c/38460] New: fails to build unwinder

[Bug c/38460] New: fails to build unwinder

[aldot at gcc dot gnu dot org]

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compiling gcc/unwind* with IMA fails to produce correct assembly with trunk:

/there/src/buildroot.git.pentium4/i686_build/staging/usr/bin/i686-linux-uclibc-gcc
 -Os -pipe -fno-builtin -O2  -Os -pipe -fno-builtin   -DIN_GCC   -W -Wall
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wcast-qual
-Wold-style-definition  -isystem ./include  -fPIC -g -DHAVE_GTHR_DEFAULT
-DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc
-I/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc
-I/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/.
-I/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc
-I/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../include 
-DHAVE_CC_TLS -DUSE_TLS -o libgcc_eh_onestep.o -MT libgcc_eh_onestep.o -MD -MP
-MF libgcc_eh_onestep.dep -fexceptions
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/emutls.c
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/gthr-gnat.c
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-c.c
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde-glibc.c
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2.c
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-sjlj.c
-fvisibility=hidden -DHIDE_EXPORTS -c -combine
In file included from
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde-glibc.c:62:
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:
In function ‘fde_unencoded_compare’:
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:326:
warning: dereferencing type-punned pointer will break strict-aliasing rules
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:327:
warning: dereferencing type-punned pointer will break strict-aliasing rules
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:
In function ‘add_fdes’:
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:682:
warning: dereferencing type-punned pointer will break strict-aliasing rules
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:
In function ‘linear_search_fdes’:
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:800:
warning: dereferencing type-punned pointer will break strict-aliasing rules
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:
In function ‘binary_search_unencoded_fdes’:
/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:848:
warning: dereferencing type-punned pointer will break strict-aliasing rules
{standard input}: Assembler messages:
{standard input}:4640: Error: symbol `read_encoded_value' is already defined
make[3]: *** [libgcc_eh_onestep.o] Error 1


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           Summary: fails to build unwinder
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: assemble-failure
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: aldot at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38460

[Bug c/38460] fails to build unwinder

[aldot at gcc dot gnu dot org]

------- Comment #1 from aldot at gcc dot gnu dot org  2008-12-09 20:37 -------
Created an attachment (id=16856)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16856&action=view)
unreduced file1


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38460

[Bug c/38460] fails to build unwinder

[aldot at gcc dot gnu dot org]

------- Comment #2 from aldot at gcc dot gnu dot org  2008-12-09 20:37 -------
Created an attachment (id=16857)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16857&action=view)
unreduced file2


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38460

[Bug c/38460] fails to build unwinder

[aldot at gcc dot gnu dot org]

------- Comment #3 from aldot at gcc dot gnu dot org  2008-12-09 20:38 -------
Created an attachment (id=16858)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16858&action=view)
unreduced file3


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38460

[Bug c/38460] fails to build unwinder

[aldot at gcc dot gnu dot org]

------- Comment #4 from aldot at gcc dot gnu dot org  2008-12-09 20:38 -------
Created an attachment (id=16859)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16859&action=view)
output of unreduced input

/there/src/buildroot.git.pentium4/i686_build/staging/usr/bin/i686-linux-uclibc-gcc
-Os emutls.i unwind-c.i unwind-dw2.i -S -o libgcc_eh-unreduced.S -combine


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38460

[Bug c/38460] fails to build unwinder

[aldot at gcc dot gnu dot org]

------- Comment #5 from aldot at gcc dot gnu dot org  2008-12-09 20:39 -------
Created an attachment (id=16860)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16860&action=view)
reduced file1


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38460

[Bug c/38460] fails to build unwinder

[aldot at gcc dot gnu dot org]

------- Comment #7 from aldot at gcc dot gnu dot org  2008-12-09 20:40 -------
Created an attachment (id=16862)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16862&action=view)
reduced file3


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38460

[Bug c/38460] fails to build unwinder

[aldot at gcc dot gnu dot org]

------- Comment #6 from aldot at gcc dot gnu dot org  2008-12-09 20:39 -------
Created an attachment (id=16861)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16861&action=view)
reduced file3


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38460

[Bug c/38460] fails to build unwinder

[aldot at gcc dot gnu dot org]

------- Comment #8 from aldot at gcc dot gnu dot org  2008-12-09 20:41 -------
Created an attachment (id=16863)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16863&action=view)
output of reduced input

/there/src/buildroot.git.pentium4/i686_build/staging/usr/bin/i686-linux-uclibc-gcc
-Os emutls.0.i unwind-c.0.i unwind-dw2.0.i -c -o libgcc_eh.o -combine -w
/tmp/ccBHYNVJ.s: Assembler messages:
/tmp/ccBHYNVJ.s:29: Error: symbol `read_encoded_value' is already defined


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38460

[Bug c/38460] fails to build unwinder

[pinskia at gcc dot gnu dot org]

------- Comment #9 from pinskia at gcc dot gnu dot org  2008-12-09 22:32 -------
This will most likely be closed as won't fix.  -combine is really not supported
and should be removed.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38460

[Bug c/38460] fails to build unwinder

[pinskia at gcc dot gnu dot org]

------- Comment #10 from pinskia at gcc dot gnu dot org  2008-12-29 14:26 -------


*** This bug has been marked as a duplicate of 35034 ***


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38460