如何在x86_64机器上编译glibc 32bit

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]: [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!

回答:

我编辑了问题,但后来我意识到正确的方法是添加答案。这是最终有效的方法:

 $ ../../src/glibc-2.6/configure --prefix=$HOME/glibc32-2.6 \

--host=i686-linux-gnu \

--build=i686-linux-gnu \

CC="gcc -m32" CXX="g++ -m32" \

CFLAGS="-O2 -march=i686" \

CXXFLAGS="-O2 -march=i686"

我认为放入-m32CC和CXX而不是CFLAGS和CXXFLAGS很重要,因为在制作过程中至少有一个不使用CFLAGS或CXXFLAGS的编译操作,而且-m32绝对必须始终存在。不知道为什么-march=i686有必要(考虑到-m32零件和--host/build选项),但确实如此。

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