Compile for old-kernel Linux

Firstly, we need the suitable Glibc version

My target Linux with kernel-2.6.9, and my host is Kernel-2.6.32, so I can use Glibc version 2.12.1

Infomation from the project Readme :

When working with Linux kernels, the GNU C Library version from

version 2.4 on is intended primarily for use with Linux kernel version

2.6.0 and later. 
 

 

wget http://ftp.gnu.org/gnu/libc/glibc-2.12.1.tar.bz2

tar -xjf glibc-2.12.1.tar.bz2

mkdir glibc-2.12.1-build

cd glibc-2.12.1-build/

../glibc-2.12.1/configure --prefix=/usr/local/glibc-2.12.1 --build=x86_64-redhat-linux-gnu --host=x86_64-redhat-linux-gnu --enable-kernel=2.6.0 --enable-static-nss

You need add the --enable-static-nss option otherwise you may get the following Warnning when compile your program with this glibc:

warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking

Error1:

 

/home/kimi/soft/glibc-2.12.1-build/libc.a(nsswitch.o):(.data+0x8): undefined reference to `_nss_files_getaliasent_r'

/home/kimi/soft/glibc-2.12.1-build/libc.a(nsswitch.o):(.data+0x18): undefined reference to `_nss_files_endaliasent'
/home/kimi/soft/glibc-2.12.1-build/libc.a(nsswitch.o):(.data+0x28): undefined reference to `_nss_files_setaliasent'
/home/kimi/soft/glibc-2.12.1-build/libc.a(nsswitch.o):(.data+0x38): undefined reference to `_nss_files_getaliasbyname_r'

....

It's a common bug since glic-2.3 version,a patchcan fix it 

patch -p1 < ../patchfile

 

make -j4

make install

 

 

Secondly, Use -static Option

gcc hello.c -o hello -L/usr/local/glibc-2.12.1/lib  -static -nostdlib  /usr/local/glibc-2.12.1/lib/crt1.o /usr/local/glibc-2.12.1/lib/crti.o -lm -lc -lgcc -lgcc_eh  -lc  /usr/local/glibc-2.12.1/lib/crtn.o

 

Reference

http://stackoverflow.com/questions/8961622/how-to-port-c-c-applications-to-legacy-linux-kernel-versions

http://blog.youkuaiyun.com/force_eagle/article/details/6758045