Shulou(Shulou.com)06/03 Report--

2.2.3 preparation

1) create new user vita

Groupadd vita

Useradd-m-s / bin/bash-g vita vita

2) add file vita to / etc/sudoers.d, file content is below:

Vita ALL= (ALL) NOPASSWD: ALL

3) mkdir / vita

4) mkdir source build cross-tool cross-gcc-tmp sysroot

5) chown-R vita.vita / vita

6) add below content to / home/vita/.bashrc

Unset LANG

Export HOST=i686-pc-linux-gnu

Export BUILD=$HOST

Export TARGET=i686-none-linux-gnu

Export CROSS_TOOL=/vita/cross-tool

Export CROSS_GCC_TMP=/vita/cross-gcc-tmp

Export SYSROOT=/vita/sysroot

PATH=$CROSS_TOOL/bin:$CROSS_GCC_TMP/bin:/sbin:/usr/sbin:$PATH

7) su-vita

2.2.4 install binutils

1) tar xvf.. / source/binutils-2.23.1.tar.bz2

2) mkdir binutils-build

3) cd binutils-build

4).. / binutils-2.23.1/configure-- prefix=$CROSS_TOOL-- target=$TARGET-- with-sysroot=$SYSROOT

5) make

6) make install

2.2.5 compile freestanding cross tool

1) cd / vita/build

2) tar xvf.. / source/gcc-4.7.2.tar.bz2

Cd gcc-4.7.2/

Tar xvf.. /.. / source/gmp-5.0.5.tar.bz2

Mv gmp-5.0.5/ gmp

Tar xvf.. /.. / source/mpc-1.0.1.tar.gz

Mv mpc-1.0.1/ mpc

Tar xvf.. /.. / source/mpfr-3.1.1.tar.bz2

Mv mpfr-3.1.1/ mpfr

Cd / vita/build

Mkdir gcc-build

Cd gcc-build

.. / gcc-4.7.2/configure-- prefix=$CROSS_GCC_TMP-- target=$TARGET-- with-sysroot=$SYSROOT-- with-newlib-- enable-languages=c-- with-mpfr-include=/vita/build/gcc-4.7.2/mpfr/src-- with-mpfr-lib=/vita/build/gcc-build/mpfr/src/.libs-- disable-shared-- disable-threads-- disable-decimal-float-- disable-libquadmath-- disable-libmudflap-- disable-libgomp-- disable-nls-- disable-libssp

Make

Make install

Cd / vita/cross-gcc-tmp

Ln-s libgcc.a lib/gcc/i686-none-linux-gnu/4.7.2/libgcc_eh.a

2.2.6 install kernel header file

Cd / vita/build

Tar xvf.. / source/linux-3.7.4.tar.xz

Cd linux-3.7.4/

Make mrproper

Make ARCH=i386 headers_check

Make ARCH=i386 INSTALL_HDR_PATH=$SYSROOT/usr/ headers_install

2.2.7 compile object system C library

Apt-get install gawk

Cd / vita/build

Tar xvf.. / source/glibc-2.15.tar.xz

Cd glibc-2.15

Patch-p1 <.. /.. / source/glibc-2.15-cpuid.patch

Patch-p1 <.. /.. / source/glibc-2.15-s_frexp.patch

Mkdir glibc-build

Cd glibc-build

.. / glibc-2.15/configure-prefix=/usr-host=$TARGET-enable-kernel=3.7.4-enable-add-ons-with-headers=$SYSROOT/usr/include libc_cv_forced_unwind=yes libc_cv_c_cleanup=yes libc_cv_ctors_header=yes

Make

Make install_root=$SYSROOT install

2.2.8 setup whole cross compiler

Cd / vita/build/gcc-build

Rm-rf *

.. / gcc-4.7.2/configure-prefix=$CROSS_TOOL-- target=$TARGET-- with-sysroot=$SYSROOT-- with-mpfr-include=/vita/build/gcc-4.7.2/mpfr/src-- with-mpfr-lib=/vita/build/gcc-build/mpfr/src/.libs-- enable-languages=c,c++-- enable-threads=posix

Make

Make install

2.2.9 set the environment variable

1) add below content to / home/vita/.bashrc

Export CC= "$TARGET-gcc"

Export CXX= "$TARGET-g++"

Export AR= "$TARGET-ar"

Export AS= "$TARGET-as"

Export RANLIB= "$TARGET-ranlib"

Export LD= "$TARGET-ld"

Export STRIP= "$TARGET-strip"

Export DESTDIR=$SYSROOT

2) source / home/vita/.bashrc

2.2.10 encapsulate cross pkg-config

1) add below content to .bashrc

Unset PKG_CONFIG_PATH

Export PKG_CONFIG_LIBDIR=$SYSROOT/usr/lib/pkgconfig:\

$SYSROOT/usr/share/pkgconfig

2) add file / vita/cross-tool/bin/pkg-config

#! / bin/bash

HOST_PKG_CFG=/usr/bin/pkg-config

If [! $SYSROOT]; then

Echo "Please make sure you are in cross-compile environment!"

Exit 1

Fi

$HOST_PKG_CFG-- exists $*

If [$?-ne 0]; then

Exit 1

Fi

If $HOST_PKG_CFG $* | sed-e "s/-I/-I\ / vita\ / sysroot/g;\"

S/-L/-L\ / vita\ / sysroot/g "

Then

Exit 0

Else

Exit 1

Fi

3) chmod aquix / vita/cross-tool/bin/pkg-config

2.2.11 handle libtool

Find $SYSROOT-name "* .la"-exec rm-f'{}'\

2.2.12 start code

Foo.c

# include

Void myinit (int argc, char * argv, char * * envp)

{

Printf ("% s\ n", _ _ FUNCTION__)

}

_ _ attribute__ ((section (".init _ array")) typeof (myinit) * _ myinit = myinit

Void test ()

{

Printf ("% s\ n", _ _ FUNCTION__)

}

Bar.c

# include

Void main ()

{

Printf ("Enter main.\ n")

Test ()

}

# gcc-shared-fPIC foo.c-o libfoo.so

# gcc bar.c-o bar-L.L /-lfoo

# LD_LIBRARY_PATH=./. / bar

Myinit

Enter main.

Test

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