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RE: Compiling and linking 32 bit code on a 64 machine (AMD Optero n)
- From: "CARTER-HITCHIN, David, GBM" <David dot CARTER-HITCHIN at rbos dot com>
- To: "'H. J. Lu'" <hjl at lucon dot org>
- Cc: "'binutils at sourceware dot org'" <binutils at sourceware dot org>
- Date: Fri, 23 Jun 2006 18:21:08 +0100
- Subject: RE: Compiling and linking 32 bit code on a 64 machine (AMD Optero n)
Hi,
> Please post it here.
Here is is:
[]-> uname -a
Linux lon3315xus 2.4.21-32.0.1.ELsmp #1 SMP Tue May 17 17:46:36 EDT 2005
x86_64 x86_64 x86_64 GNU/Linux
[]-> cat /etc/redhat-release
Red Hat Enterprise Linux AS release 3 (Taroon Update 7)
[]-> g++ -v
Reading specs from
/apps/IRDtools/pkgs/pd/gcc/3.4.1/p4/bin/../lib/gcc/i686-pc-linux-gnu/3.4.1/s
pecs
Configured with: /usr/local/build/gcc-3.4.1/configure
--prefix=/opt/GDStools/pkgs/pd/gcc/3.4.1/p4 --enable-threads
--enable-languages=c,c++
Thread model: posix
gcc version 3.4.1
[lon3315xus]-> ld --version
GNU ld version 2.16
Copyright 2005 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License. This program has absolutely no warranty.
[]-> cat hello.cpp
#include <iostream>
int main () {
std::cout << "hello, world\n";
}
[]-> cat Makefile
hello: hello.o
g++ -Wl,--verbose -Wl,-L,/usr/lib -Wl,--format,elf32-i386
-Wl,-m,elf_i386 -o hello
-L/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6
/32 -L/usr/lib
hello.o:
g++ -fPIC -Wall -Werror -Wno-sign-compare -march=i386 -m32 -c
hello.cpp -o hello.o
make > output 2>&1
cat output
g++ -Wl,--verbose -Wl,-L,/usr/lib -Wl,--format,elf32-i386 -Wl,-m,elf_i386 -o
hello
-L/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6
/32 -L/usr/lib
GNU ld version 2.16
Supported emulations:
elf_x86_64
elf_i386
i386linux
using internal linker script:
==================================================
/* Script for -z combreloc: combine and sort reloc sections */
OUTPUT_FORMAT("elf32-i386", "elf32-i386",
"elf32-i386")
OUTPUT_ARCH(i386)
ENTRY(_start)
SEARCH_DIR("/apps/IRDtools/pkgs/pd/binutils/2.16-opteron/i386-unknown-linux-
gnu/lib"); SEARCH_DIR("/apps/IRDtools/pkgs/pd/binutils/2.16-opteron/lib");
SEARCH_DIR("/usr/local/lib"); SEARCH_DIR("/lib"); SEARCH_DIR("/usr/lib");
/* Do we need any of these for elf?
__DYNAMIC = 0; */
SECTIONS
{
/* Read-only sections, merged into text segment: */
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KEEP (*(.text.*personality*))
/* .gnu.warning sections are handled specially by elf32.em. */
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} =0x90909090
.fini :
{
KEEP (*(.fini))
} =0x90909090
PROVIDE (__etext = .);
PROVIDE (_etext = .);
PROVIDE (etext = .);
.rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
.rodata1 : { *(.rodata1) }
.eh_frame_hdr : { *(.eh_frame_hdr) }
.eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) }
.gcc_except_table : ONLY_IF_RO { KEEP (*(.gcc_except_table))
*(.gcc_except_table.*) }
/* Adjust the address for the data segment. We want to adjust up to
the same address within the page on the next page up. */
. = ALIGN (0x1000) - ((0x1000 - .) & (0x1000 - 1)); . = DATA_SEGMENT_ALIGN
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/* Exception handling */
.eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) }
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.tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
/* Ensure the __preinit_array_start label is properly aligned. We
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the linker would then create the section even if it turns out to
be empty, which isn't pretty. */
. = ALIGN(32 / 8);
PROVIDE (__preinit_array_start = .);
.preinit_array : { KEEP (*(.preinit_array)) }
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PROVIDE (__init_array_start = .);
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KEEP (*crtbegin*.o(.ctors))
/* We don't want to include the .ctor section from
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KEEP (*(EXCLUDE_FILE (*crtend*.o ) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
}
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. = DATA_SEGMENT_RELRO_END (12, .);
.got.plt : { *(.got.plt) }
.data :
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KEEP (*(.gnu.linkonce.d.*personality*))
SORT(CONSTRUCTORS)
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_edata = .;
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/DISCARD/ : { *(.note.GNU-stack) }
}
==================================================
attempt to open /usr/lib/../lib64/crt1.o succeeded
/usr/lib/../lib64/crt1.o
attempt to open /usr/lib/../lib64/crti.o succeeded
/usr/lib/../lib64/crti.o
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/c
rtbegin.o succeeded
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/c
rtbegin.o
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/3
2/libgcc.so failed
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/3
2/libgcc.a succeeded
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/3
2/libgcc_eh.so failed
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/3
2/libgcc_eh.a succeeded
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/3
2/libc.so failed
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/3
2/libc.a failed
att/apps/IRDtools/pkgs/pd/binutils/2.16-opteron/bin/ld: warning: i386:x86-64
architecture of input file `/usr/lib/../lib64/crt1.o' is incompatible with
i386 output
/apps/IRDtools/pkgs/pd/binutils/2.16-opteron/bin/ld: warning: i386:x86-64
architecture of input file `/usr/lib/../lib64/crti.o' is incompatible with
i386 output
/apps/IRDtools/pkgs/pd/binutils/2.16-opteron/bin/ld: warning: i386:x86-64
architecture of input file
`/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/
crtbegin.o' is incompatible with i386 output
/apps/IRDtools/pkgs/pd/binutils/2.16-opteron/bin/ld: warning: i386:x86-64
architecture of input file
`/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/
crtend.o' is incompatible with i386 output
/apps/IRDtools/pkgs/pd/binutils/2.16-opteron/bin/ld: warning: i386:x86-64
architecture of input file `/usr/lib/../lib64/crtn.o' is incompatible with
i386 output
/usr/lib/../lib64/crt1.o: In function `_start':
: undefined reference to `main'
empt to open /usr/lib/libc.so succeeded
opened script file /usr/lib/libc.so
opened script file /usr/lib/libc.so
attempt to open /lib/libc.so.6 succeeded
/lib/libc.so.6
attempt to open /usr/lib/libc_nonshared.a succeeded
(/usr/lib/libc_nonshared.a)elf-init.oS
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/3
2/libgcc.so failed
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/3
2/libgcc.a succeeded
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/3
2/libgcc_eh.so failed
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/3
2/libgcc_eh.a succeeded
attempt to open
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/c
rtend.o succeeded
/apps/IRDtools/pkgs/pd/gcc/3.4.6/o1/lib/gcc/x86_64-unknown-linux-gnu/3.4.6/c
rtend.o
attempt to open /usr/lib/../lib64/crtn.o succeeded
/usr/lib/../lib64/crtn.o
ld-linux.so.2 needed by /lib/libc.so.6
found ld-linux.so.2 at /lib/ld-linux.so.2
collect2: ld returned 1 exit status
make: *** [hello] Error 1
What is odd is that it is accessing /usr/lib64 from /usr/lib/../lib64.
Perhaps this is a clue as to what is going wrong?
Thanks,
David.
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