http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54584
--- Comment #2 from Larry Baker <baker at usgs dot gov> 2012-09-18 02:44:43 UTC
---
The Sourcery (Mentor Graphics) ColdFire uClinux SDK I use uses binutils-1.21.
I installed binutils-2.22 and the latest uClinux elf2flt (downloaded 20120730).
$ /usr/local/gcc-4.7.1/bin/m68k-uclinux-ld -V -v
GNU ld (GNU Binutils) 2.22
Supported emulations:
m68kelf
GNU ld (GNU Binutils) 2.22
The error message is the same (Nonrepresentable section on output).
I am able to issue the failing command (collect2) outside of make gcc:
$
COMPILER_PATH=/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/:/usr/local/gcc-4.7.1/m68k-uclinux/bin/:/usr/local/gcc-4.7.1/m68k-uclinux/lib/
\
/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/collect2
--sysroot=/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data
--eh-frame-hdr -elf2flt -o conftest -t
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crt1.o
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crti.o
/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/msep-data/crtbegin.o
-L/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/msep-data
-L/usr/local/gcc-4.7.1/m68k-uclinux/lib/msep-data
-L/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc
-L/usr/local/gcc-4.7.1/m68k-uclinux/bin -L/usr/local/gcc-4.7.1/m68k-uclinux/lib
-L/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib
conftest.o -lgcc -lc -lgcc
/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/msep-data/crtend.o
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crtn.o
/usr/local/gcc-4.7.1/m68k-uclinux/bin/ld.real: mode m68kelf
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crt1.o
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crti.o
/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/msep-data/crtbegin.o
conftest.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)__uClibc_main.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)strrchr.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)exit.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)_exit.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)__errno_location.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)strchr.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)errno.o
/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/msep-data/crtend.o
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crtn.o
/usr/local/gcc-4.7.1/m68k-uclinux/bin/ld.real: final link failed:
Nonrepresentable section on output
collect2: error: ld returned 1 exit status
If I remove the -elf2flt option, the error goes away:
$
COMPILER_PATH=/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/:/usr/local/gcc-4.7.1/m68k-uclinux/bin/:/usr/local/gcc-4.7.1/m68k-uclinux/lib/
\
/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/collect2
--sysroot=/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data
--eh-frame-hdr -o conftest -t
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crt1.o
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crti.o
/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/msep-data/crtbegin.o
-L/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/msep-data
-L/usr/local/gcc-4.7.1/m68k-uclinux/lib/msep-data
-L/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc
-L/usr/local/gcc-4.7.1/m68k-uclinux/bin -L/usr/local/gcc-4.7.1/m68k-uclinux/lib
-L/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib
conftest.o -lgcc -lc -lgcc
/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/msep-data/crtend.o
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crtn.o
/usr/local/gcc-4.7.1/m68k-uclinux/bin/ld.real: mode m68kelf
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crt1.o
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crti.o
/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/msep-data/crtbegin.o
conftest.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)__uClibc_main.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)strrchr.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)exit.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)_exit.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)__errno_location.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)strchr.o
(/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/libc.a)errno.o
/tmp/freescale-coldfile-xgcc/cross-gcc-4.7.1/gcc/msep-data/crtend.o
/tmp/freescale-coldfile-xgcc/freescale-coldfire-2011.09/m68k-uclinux/libc/msep-data/usr/lib/crtn.o
We can see that the size 0 .tm_clone_table section from crtbegin.o/crtend.o
does not appear in the elf32-m68k executable (conftest):
$ /usr/local/gcc-4.7.1/bin/m68k-uclinux-objdump -h
cross-gcc-4.7.1/gcc/msep-data/crtbegin.o
cross-gcc-4.7.1/gcc/msep-data/crtbegin.o: file format elf32-m68k
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 00000136 00000000 00000000 00000034 2**2
CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
1 .data 00000004 00000000 00000000 0000016c 2**2
CONTENTS, ALLOC, LOAD, DATA
2 .bss 0000001e 00000000 00000000 00000170 2**2
ALLOC
3 .ctors 00000004 00000000 00000000 00000170 2**2
CONTENTS, ALLOC, LOAD, DATA
4 .dtors 00000004 00000000 00000000 00000174 2**2
CONTENTS, ALLOC, LOAD, DATA
5 .eh_frame 00000000 00000000 00000000 00000178 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
6 .jcr 00000000 00000000 00000000 00000178 2**2
CONTENTS, ALLOC, LOAD, DATA
7 .tm_clone_table 00000000 00000000 00000000 00000178 2**2
CONTENTS, ALLOC, LOAD, DATA
8 .fini 00000006 00000000 00000000 00000178 2**0
CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
9 .init 00000006 00000000 00000000 0000017e 2**0
CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
10 .comment 00000012 00000000 00000000 00000184 2**0
CONTENTS, READONLY
11 .note.GNU-stack 00000000 00000000 00000000 00000196 2**0
CONTENTS, READONLY
$ /usr/local/gcc-4.7.1/bin/m68k-uclinux-objdump -h conftest
conftest: file format elf32-m68k
Sections:
Idx Name Size VMA LMA File off Algn
0 .init 00000014 80000094 80000094 00000094 2**1
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .text 000004f8 800000a8 800000a8 000000a8 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
2 .fini 0000000e 800005a0 800005a0 000005a0 2**1
CONTENTS, ALLOC, LOAD, READONLY, CODE
3 .rodata 00000001 800005ae 800005ae 000005ae 2**0
CONTENTS, ALLOC, LOAD, READONLY, DATA
4 .eh_frame 00000004 800005b0 800005b0 000005b0 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
5 .ctors 00000008 800025b4 800025b4 000005b4 2**2
CONTENTS, ALLOC, LOAD, DATA
6 .dtors 00000008 800025bc 800025bc 000005bc 2**2
CONTENTS, ALLOC, LOAD, DATA
7 .jcr 00000004 800025c4 800025c4 000005c4 2**2
CONTENTS, ALLOC, LOAD, DATA
8 .got 000000e0 800025c8 800025c8 000005c8 2**2
CONTENTS, ALLOC, LOAD, DATA
9 .data 0000002c 800026a8 800026a8 000006a8 2**2
CONTENTS, ALLOC, LOAD, DATA
10 .bss 00000044 800026d4 800026d4 000006d4 2**2
ALLOC
11 .comment 00000011 00000000 00000000 000006d4 2**0
CONTENTS, READONLY
The Nonrepresentable... error message comes from the binutils bfd library:
$ find . -type f -exec grep Nonrepresentable {} ';' -ls
N_("Nonrepresentable section on output"),
2461573630 104 -rw-r--r-- 1 baker wheel 49841 Jul 11 2011
./binutils-2.22/bfd/bfd.c
I don't know where in bfd the error occurs -- there are many bfd_set_error
(bfd_error_nonrepresentable_section) calls.
I assume that "normal" ld uses bfd. So, what is it about Flat Binary
-msep-data (-fPIC) code that is causing the problem?
I will raise the issue on the uClinux user forum as well.
