GCC configure problem with 32-bit stuff on x86_64

Chris Lu kalenedrael@gmail.com
Tue Nov 15 22:31:00 GMT 2005


Hi,

On 11/15/05, Kai Ruottu <karuottu@mbnet.fi> wrote:
>
>   The FSF GCC sources seem to expect the Linux/x86_64 installations
> to have the default 64-bit stuff in '*/lib64' and the 32-bit stuff
> in '*/lib', so you have a problem to solve with this. What kind of
> Linux/x86_64 puts its libraries this way?

I believe Debian and Debian-based distros do (I'm using Ubuntu).

>   Anyway the place where the default settings for GCC are told, is
> the 'gcc/config/i386/t-linux64', a clip from its beginning :
>
> ----------------------- clip ------------------------------------
> # On x86-64 we do not need any exports for glibc for 64-bit libgcc_s,
> # override the settings
> # from t-slibgcc-elf-ver and t-linux
> SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver \
>                  $(srcdir)/config/i386/libgcc-x86_64-glibc.ver
>
> MULTILIB_OPTIONS = m64/m32
> MULTILIB_DIRNAMES = 64 32
> MULTILIB_OSDIRNAMES = ../lib64 ../lib
> ----------------------- clip ------------------------------------
>
>   So changing the last row to be:
>
> MULTILIB_OSDIRNAMES = ../lib ../lib32
>
> should change the default behaviour to be for your 'custom'
> Linux/x86_64... At least I think this being the place for setting
> those 'operating system directory names'.
>

I did that, and gcc fails on:

checking for g++ that supports -ffunction-sections -fdata-sections... yes
checking for sin in -lm... configure: error: Link tests are not
allowed after GCC_NO_EXECUTABLES.
make: *** [configure-target-libstdc++-v3] Error 1

as before. I tried the make install-gcc trick to bypass libstdc++, and
that installs properly but it still has problems with crt*.o:

$ gcc -o hello -m32 -v hello.c
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.0.2/configure
Thread model: posix
gcc version 4.0.2
 /usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.0.2/cc1 -quiet -v
hello.c -quiet -dumpbase hello.c -m32 -mtune=k8 -auxbase hello
-version -o /tmp/ccWDV8FJ.s
ignoring nonexistent directory "NONE/include"
ignoring nonexistent directory
"/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.0.2/../../../../x86_64-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.0.2/include
 /usr/include
End of search list.
GNU C version 4.0.2 (x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.0.2.
GGC heuristics: --param ggc-min-expand=98 --param ggc-min-heapsize=128234
 as -V -Qy --32 -o /tmp/ccqG9m2o.o /tmp/ccWDV8FJ.s
GNU assembler version 2.15 (x86_64-linux) using BFD version 2.15
 /usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.0.2/collect2
--eh-frame-hdr -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o hello
/usr/lib/../lib32/crt1.o /usr/lib/../lib32/crti.o
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.0.2/32/crtbegin.o
-L/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.0.2/32
-L/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.0.2
-L/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.0.2/../../../../lib32
-L/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.0.2/../../..
-L/lib/../lib32 -L/usr/lib/../lib32 /tmp/ccqG9m2o.o -lgcc --as-needed
-lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.0.2/32/crtend.o
/usr/lib/../lib32/crtn.o
/usr/lib/../lib32/crt1.o(.text+0xc): In function `_start':
../sysdeps/i386/elf/start.S:92: undefined reference to `__libc_csu_fini'
/usr/lib/../lib32/crt1.o(.text+0x11):../sysdeps/i386/elf/start.S:93:
undefined reference to `__libc_csu_init'
collect2: ld returned 1 exit status

Chris Lu



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