ubuntu16.04编译gcc5.04为X86-mips交叉编译器

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mips-elf的交叉编译环境源自网络中的一片文章，但我找不到了出处。同时也经过了我的

一些修改，最终我在slackware 12.0的Linux中成功的配置出了这个交叉编译环境。至于在

其他版本的linux中我相信也是应该可以成功编译的，不过我会尽快在其他的linux中进行

验证的，以方便大家参考。对于不足之处还请指正！！

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The following is steps to build cross compilers. So far, I tried only for PowerPC and MIPS.

Basically, all you have to do is to follow the following 9 steps.

1. What do you need?

First, you have to obtain the following source codes

binutils http://www.gnu.org/software/binutils/
GCC http://www.gnu.org/software/gcc/gcc.html
newlib http://sources.redhat.com/newlib/
GDB http://www.gnu.org/software/gdb/gdb.html

2. Set environment variables

First, choose your taget such as powerpc-eabi, powerpc-elf, mips-elf, and so on

For bash simply type

% export TARGET=powerpc-eabi

% export PREFIX=/usr/local/$TARGET

% export PATH=$PATH:$PREFIX/bin

3. Build binutils

% tar xjfv binutils-2.17.tar.bz2

% mkdir build-binutils

% cd build-binutils

% ../binutils-2.17/configure --target=$TARGET --prefix=$PREFIX

% make all

% make install

4. Build bootstrap GCC

% tar xjfv gcc-4.1.1.tar.bz2

% mkdir build-gcc

% cd build-gcc

% ../gcc-4.1.1/configure --target=$TARGET --prefix=$PREFIX --without-headers --with-newlib  --with-gnu-as --with-gnu-ld

% make all-gcc

% make install-gcc

--with-gnu-as --with-gnu-ld prevents native assembler on certain architectures. (for others, these do not have any effects)

5. Build newlib

Newlib provides standard C library for embedded systems

% tar xzfv newlib-1.14.0.tar.gz 

% mkdir build-newlib

% cd build-newlib

% ../newlib-1.14.0/configure --target=$TARGET --prefix=$PREFIX

% make all

% make install

6. Build GCC again with newlib

% cd build-gcc

% ../gcc-4.1.1/configure --target=$TARGET --prefix=$PREFIX --with-newlib --with-gnu-as --with-gnu-ld --disable-shared --disable-libssp

% make all

% make install

7. GDB with PSIM

% tar xjfv gdb-6.3.tar.bz2  

% mkdir build-gdb

% cd build-gdb

% ../gdb-6.3/configure --target=$TARGET --prefix=$PREFIX --enable-sim-powerpc

--enable-sim-stdio

% make all

% make install

Congratulations! You build your tool chain

8. Compile your code

Now, it's time to compile your code.

% powerpc-eabi-gcc -mcpu=405 hello.c -o hello -msim

% mips-elf-gcc -Tidt.ld -mips4 hello.c -o hello

-T option specifies libraries that include start code.

To Compile with specific Memory map

% powerpc-eabi-gcc -Wl,-Ttext,0x4000,-Tdata,0xf000 hello.c -msim

(-Wl,-Ttext,0x4000,-Tdata,0x10000)

9. Run

% powerpc-eabi-run hello

% mips-elf-run hello

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