我正在尝试在x86_64上编译glibc（作为次要的，不是系统的替代品）2.6，并试图使其生成32位对象。当我给它一个标准配置时，它可以很好地编译，生成通常的64位库对象。一些信息：

$ uname -a
Linux localhost.localdomain 2.6.18-164.11.1.el5 #1 SMP Wed Jan 20

07:32:21 \
EST 2010 x86_64 x86_64 x86_64 GNU/Linux

$ cat /etc/redhat-release
CentOS release 5.4 (Final)

除其他外，我尝试了以下方法：

尝试1：

$ # [in build/glibc-2.6]
$ ../../src/glibc-2.6/configure --prefix=$HOME/glibc32-2.6 \
                                --with-cpu=i386-pc-linux-gnu

...

checking sysdep dirs... configure: error: The i386-pc-linux-gnu
subspecies of x86_64 is not supported."

尝试2：

$ ../../src/glibc-2.6/configure --prefix=$HOME/glibc32-2.6 \
                                --host=i386-pc-linux-gnu

...

$ make

配置成功，但是make会导致一系列编译错误，如下所示：

nptl/sysdeps/i386/tls.h:65:3: error: #error "TLS support is required."
In file included from include/tls.h:6,
                 from sysdeps/unix/sysv/linux/i386/sysdep.h:30,
                 from <stdin>:1:

如果添加–with-tls和/或–target = i386-pc-linux-gnu，我会得到相同的结果。

[编辑：看来我对–build的–target感到困惑。我尝试添加–build = i386-pc-linux-gnu，也尝试添加其他所有尝试使用–
target的尝试。在所有情况下，我得到的结果都与以前完全一样。]

尝试3：

$ CFLAGS=-m32 \
  ../../src/glibc-2.6/configure --prefix=$HOME/glibc32-2.6 \
                                --host=i386-pc-linux-gnu \

...

In file included from ./../include/libc-symbols.h:55,
                 from <command line>:1:
/home/USER/build/glibc32-2.6/config.h:3:3: error: #error "glibc cannot

be \
compiled without optimization”

同样，–with-tls也会发生相同的情况

尝试4：

$ CFLAGS="-m32 -O2" \
  ../../src/glibc-2.6/configure --prefix=$HOME/glibc32-2.6 \
                                --host=i386-pc-linux-gnu \

...

gcc ../sysdeps/unix/sysv/linux/i386/sysdep.S -c  -I../include \
    -I/home/USER/build/glibc32-2.6/csu \
    -I/home/USER/build/glibc32-2.6 -I../sysdeps/i386/elf \
    -I../nptl/sysdeps/unix/sysv/linux/i386 \
    -I../sysdeps/unix/sysv/linux/i386 \
    -I../nptl/sysdeps/unix/sysv/linux \
    -I../nptl/sysdeps/pthread -I../sysdeps/pthread \
    -I../sysdeps/unix/sysv/linux -I../sysdeps/gnu \
    -I../sysdeps/unix/common -I../sysdeps/unix/mman \
    -I../sysdeps/unix/inet -I../sysdeps/unix/sysv/i386 \
    -I../nptl/sysdeps/unix/sysv -I../sysdeps/unix/sysv \
    -I../sysdeps/unix/i386 -I../nptl/sysdeps/unix \
    -I../sysdeps/unix -I../sysdeps/posix \
    -I../sysdeps/i386/fpu -I../nptl/sysdeps/i386 \
    -I../sysdeps/i386 -I../sysdeps/wordsize-32 \
    -I../sysdeps/ieee754/ldbl-96 \
    -I../sysdeps/ieee754/dbl-64 \
    -I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754 \
    -I../sysdeps/generic/elf -I../sysdeps/generic \
    -I../nptl  -I.. -I../libio -I. \
    -D_LIBC_REENTRANT -include ../include/libc-symbols.h \
    -DHAVE_INITFINI -DASSEMBLER \
    -I/home/USER/build/glibc32-2.6/csu/. -DGAS_SYNTAX \
    -Wa,--noexecstack \
    -o /home/USER/build/glibc32-2.6/csu/sysdep.o \
    -MD -MP \
    -MF /home/USER/build/glibc32-2.6/csu/sysdep.o.dt \
    -MT /home/USER/build/glibc32-2.6/csu/sysdep.o

../sysdeps/unix/i386/sysdep.S: Assembler messages:
../sysdeps/unix/i386/sysdep.S:51: Error: @NTPOFF reloc is not supported

\
with 64-bit output format
../sysdeps/unix/i386/sysdep.S:51: Error: junk `@NTPOFF’ after expression

我觉得这样应该更容易。我想念什么吗？

如果您需要更多信息，请告诉我，我会提供。

[编辑]

尝试5（由EmployedRussian建议）

$ ../../src/glibc-2.6/configure --prefix=$HOME/glibc32-2.6 \
     CC="gcc -m32" CXX="g++ -m32" i686-linux-gnu

...

gcc -m32   -nostdlib -nostartfiles -shared \
    -o /home/USER/build/glibc32-2.6/elf/ld.so
    -Wl,-z,combreloc -Wl,-z,relro -Wl,--hash-style=both -Wl,-z,defs
    /home/USER/build/glibc32-2.6/elf/librtld.os \
    -Wl,--version-script=/home/USER/build/glibc32-2.6/ld.map \
    -Wl,-soname=ld-linux.so.2 \
    -T /home/USER/build/glibc32-2.6/elf/ld.so.lds
/home/USER/build/glibc32-2.6/elf/librtld.os: In function

add_dependency': /home/USER/src/glibc-2.6/elf/dl-lookup.c:106: undefined reference to__sync_fetch_and_add_4’
/home/USER/src/glibc-2.6/elf/dl-lookup.c:110: undefined reference to
__sync_val_compare_and_swap_4' /home/USER/build/glibc32-2.6/elf/librtld.os: In function_dl_profile_fixup’:
/home/USER/src/glibc-2.6/elf/dl-runtime.c:196: undefined reference to
__sync_val_compare_and_swap_4' /home/USER/src/glibc-2.6/elf/dl-runtime.c:205: undefined reference to__sync_fetch_and_add_4’
/home/USER/build/glibc32-2.6/elf/librtld.os: In function _dl_fixup': /home/USER/src/glibc-2.6/elf/dl-runtime.c:102: undefined reference to__sync_val_compare_and_swap_4’
/home/USER/src/glibc-2.6/elf/dl-runtime.c:110: undefined reference to
__sync_fetch_and_add_4' /home/USER/build/glibc32-2.6/elf/librtld.os: In functiondl_open_worker’:
/home/USER/src/glibc-2.6/elf/dl-open.c:425: undefined reference to
__sync_val_compare_and_swap_4' /home/USER/src/glibc-2.6/elf/dl-open.c:427: undefined reference to__sync_fetch_and_add_4’
/home/USER/build/glibc32-2.6/elf/librtld.os: In function
_dl_close_worker': /home/USER/src/glibc-2.6/elf/dl-close.c:407: undefined reference to__sync_val_compare_and_swap_4’
/home/USER/src/glibc-2.6/elf/dl-close.c:409: undefined reference to
__sync_fetch_and_add_4' collect2: ld returned 1 exit status make[2]: *** [/home/USER/build/glibc32-2.6/elf/ld.so] Error 1 make[2]: Leaving directory/home/USER/src/glibc-2.6/elf’
make[1]: [elf/subdir_lib] Error 2
make[1]: Leaving directory `/home/USER/src/glibc-2.6’
make: [all] Error 2

这次，构建成功运行了很长时间，直到遇到错误。我进行了搜索，发现有一些提示表明我添加了“ -march”标志。最终成功了：

尝试6：

$ ../../src/glibc-2.6/configure --prefix=$HOME/glibc32-2.6 \
     CC="gcc -m32" CXX="g++ -m32" \
     CFLAGS="-O2 -march=i686" \
     CXXFLAGS="-O2 -march=i686" \
     i686-linux-gnu

谢谢大家！