rtems-6.1-rc4 pc386平台示例编译及QEMU 仿真

    rtems官网上最新发布的代码是6.1-rc4,相对于老版本，做了较大的改动， 文件目录组织方式，尤其是编译系统，移除了autoconf/automake，使用waf python脚本编译，当前使用python脚本配置编译，已称为主流，例如yacto、openbmc等，都是基于python开发的编译配置系统

    rtems-6.1-rc4编译工具链编译方式与老版本类似，rtems-source-builder下载编译相关工具链等

解压到如下目录中，

/root/rtems-source-builder-6.1-rc4

新建patches sources目录，结构如下

├── bare

│   └── config

├── CODEOWNERS

├── LICENSE.md

├── README.md

├── rtems

│   ├── build

│   ├── config

│   ├── patches

│   └── sources

├── source-builder

└── VERSION

将Index of /pub/rtems/releases/6/rc/6.1-rc4/sources下载的.diff patch等文件复制到patches目录，其他 .tar.gz  .tar.xz等放到sources目录下

运行如下命令，编译生成386平台的工具链

../source-builder/sb-set-builder --prefix=$HOME/development/rtems/6.1-rc4  6/rtems-i386   --no-download     --rtems-bsp     --keep-going

注意，上文中我们已经下载了编译需要的相关文件，所以这个地方选择不下载参数，如果有报错也继续编译

过程中遇到如下报错

config.status: linking mpn/x86_64/k8/gmp-mparam.h to gmp-mparam.h

config.status: executing libtool commands

configure: summary of build options:

  Version:           GNU MP 6.3.0

  Host type:         x86_64-pc-linux-gnu

  ABI:               64

  Install prefix:    /root/rtems-source-builder-6.1-rc4/rtems/build/tmp/sb-0-internal

  Compiler:          gcc -O2 -g -pipe -I/root/rtems-source-builder-6.1-rc4/rtems/build/tmp/sb-0/devel/gmp-internal/root/development/rtems/6.1-rc4/include -I/root/rtems-source-builder-6.1-rc4/rtems/build/tmp/sb-0-internal/include -std=gnu99

  Static libraries:  yes

  Shared libraries:  no

gcc -O2 -g -pipe -I/root/rtems-source-builder-6.1-rc4/rtems/build/tmp/sb-0/devel/gmp-internal/root/development/rtems/6.1-rc4/include -I/root/rtems-source-builder-6.1-rc4/rtems/build/tmp/sb-0-internal/include `test -f 'gen-psqr.c' || echo './'`gen-psqr.c -o gen-psqr -lm

gen-sieve.c: In function 'setmask':

gen-sieve.c:99:3: error: 'for' loop initial declarations are only allowed in C99 mode

   for (unsigned i = 0; i < 2 * a * b; ++i)

   ^

gen-sieve.c:99:3: note: use option -std=c99 or -std=gnu99 to compile your code

make: *** [gen-sieve] Error 1

make: *** Waiting for unfinished jobs....

shell cmd failed: /bin/sh -ex  /root/rtems-source-builder-6.1-rc4/rtems/build/gmp-6.3.0-x86_64-linux-gnu-1/do-build

error: building gmp-6.3.0-x86_64-linux-gnu-1[root@localhost rtems]#

添加gmp编译时的CFLAG选项-std=c99

/root/rtems-source-builder-6.1-rc4/source-builder/config/gmp.cfg中修改

%build

  build_top=$(pwd)

  cd gmp-%{gmp_version}

  %{host_build_flags}

#wx add

  CC_FOR_BUILD="${CC_FOR_BUILD} -std=c99"

#wx add

  ./configure \

    --build=%{_build} --host=%{_host} \

    --verbose \

    --prefix=%{gmp_prefix} --bindir=%{gmp_bindir} \

    --exec-prefix=%{gmp_exec_prefix} \

    --includedir=%{gmp_includedir} --libdir=%{gmp_libdir} \

    --mandir=%{gmp_mandir} --infodir=%{gmp_infodir} \

    --disable-shared \

    %{gmp_extra_options}

编译GDB时提示no usable python found at /usr/bin/python2

checking whether to use python... /usr/bin/python2

configure: error: no usable python found at /usr/bin/python2

checking for python... no

make[1]: *** [configure-gdb] Error 1

make[1]: Leaving directory `/root/rtems-source-builder-6.1-rc4/rtems/build/i386-rtems6-gdb-14.2-x86_64-linux-gnu-1/build'

make: *** [all] Error 2

shell cmd failed: /bin/sh -ex  /root/rtems-source-builder-6.1-rc4/rtems/build/i386-rtems6-gdb-14.2-x86_64-linux-gnu-1/do-build

error: building i386-rtems6-gdb-14.2-x86_64-linux-gnu-1[root@localhost rtems]#

即使安装了python2的python-devel 也无法BUILD过，临时移除GDB的编译后整体编译通过OK

修改文件 /rtems-source-builder-6.1-rc4/rtems/config/tools/rtems-default-tools.bset

#

# Build gdb first to raise the Python install error as early as

# possible.

#

# GCC and GDB need GMP and MPFR.

#

%{with_rtems_dtc}

devel/expat-internal

devel/gmp-internal

devel/mpfr-internal

%{with_rtems_gsed}

%{with_rtems_texinfo}

#%{with_rtems_gdb}

%{with_rtems_binutils}

%{with_rtems_gcc}

%{with_rtems_tools}

安装PYTHON3之后，单独编译，提示报错，需要安装 python3 的devel 包，

[root@localhost rtems]# ../source-builder/sb-set-builder --prefix=$HOME/development/rtems/6.1-rc4 6/rtems-i386 --no-download

RTEMS Source Builder - Set Builder, 6.1-rc4

Build Set: 6/rtems-i386

Build Set: tools/rtems-default-tools.bset

config: tools/rtems-gdb-14.2.cfg

error: config error: gdb-common-1.cfg:123: "gdb: python: header file not found: python3.6/Python.h, please install"

Build FAILED

Build Set: Time 0:00:00.099069

error: config error: gdb-common-1.cfg:123: "gdb: python: header file not found: python3.6/Python.h, please install"

Build Set: Time 0:00:00.101830

Build FAILED

直接下载python3.6.8源码configure 重新make, make install 之后再BUILD GDB不再报错

至此RTEMS6的 build tool chain 已build完成，目录位于

$HOME/development/rtems/6.1-rc4

编译代码

新代码的编译配置系统已经修改为 WAF，相关命令与之前版本差别较大，需要注意,

列出当前支持哪些BSP

切换到rtems-6.1-rc4的代码根目录下

列出当前支持哪些BSP.新版本的脚本执行速度非常快

[root@localhost rtems-6.1-rc4]# ./rtems-bsps

RTEMS 6 Board Support Packages

Architectures: 18

BSP Families: 93

BSPs: 222

其他省略

i386: (families:1 bsps:6)

 pc386                        pc386

 pc486                        pc386

 pc586                        pc386

 pc586-sse                    pc386

 pc686                        pc386

 pcp4                         pc386

查看waf 支持的命令

 [root@localhost rtems-6.1-rc4]# ./waf --help

usage: waf [commands] [options]

Main commands (example: ./waf build -j4)

  bspdefaults: get all options with default values for base BSP variants

  bsplist    : lists base BSP variants

  build      : executes the build

  clean      : cleans the project

  configure  : configures the project

  dist       : makes a tarball for redistributing the sources

  distcheck  : checks if the project compiles (tarball from 'dist')

  distclean  : removes build folders and data

  install    : installs the targets on the system

  list       : lists the targets to execute

  step       : executes tasks in a step-by-step fashion, for debugging

  uninstall  : removes the targets installed

先生成一个默认的配置文件config.ini

[root@localhost rtems-6.1-rc4]# ./waf bspdefaults --rtems-bsps=i386/pc386 > config.ini

生成配置

[root@localhost rtems-6.1-rc4]# ./waf configure --rtems-bsps=i386/pc386 --rtems-config=./config.ini --rtems-tools=/root/development/rtems-i386-toolchain/6.1-rc4

Setting top to                           : /root/rtems-6.1-rc4

Setting out to                           : /root/rtems-6.1-rc4/build

Configure RTEMS version from file        : VERSION

Regenerate build specification cache (needs a couple of seconds)...

Configure board support package (BSP)    : i386/pc386

Checking for program 'i386-rtems6-gcc'   : /root/development/rtems-i386-toolchain/6.1-rc4/bin/i386-rtems6-gcc

Checking for program 'i386-rtems6-g++'   : /root/development/rtems-i386-toolchain/6.1-rc4/bin/i386-rtems6-g++

Checking for program 'i386-rtems6-ar'    : /root/development/rtems-i386-toolchain/6.1-rc4/bin/i386-rtems6-ar

Checking for program 'i386-rtems6-ld'    : /root/development/rtems-i386-toolchain/6.1-rc4/bin/i386-rtems6-ld

Checking for program 'ar'                : /root/development/rtems-i386-toolchain/6.1-rc4/bin/i386-rtems6-ar

Checking for program 'g++, c++'          : /root/development/rtems-i386-toolchain/6.1-rc4/bin/i386-rtems6-g++

Checking for program 'ar'                : /root/development/rtems-i386-toolchain/6.1-rc4/bin/i386-rtems6-ar

Checking for program 'gas, gcc'          : /root/development/rtems-i386-toolchain/6.1-rc4/bin/i386-rtems6-gcc

Checking for program 'ar'                : /root/development/rtems-i386-toolchain/6.1-rc4/bin/i386-rtems6-ar

Checking for program 'gcc, cc'           : /root/development/rtems-i386-toolchain/6.1-rc4/bin/i386-rtems6-gcc

Checking for program 'ar'                : /root/development/rtems-i386-toolchain/6.1-rc4/bin/i386-rtems6-ar

Checking for asm flags '-MMD'            : yes

Checking for c flags '-MMD'              : yes

Checking for cxx flags '-MMD'            : yes

'configure' finished successfully (6.862s)

开始实质性的编译过程

[root@localhost rtems-6.1-rc4]# ./waf build

Waf: Entering directory `/root/rtems-6.1-rc4/build'

Waf: Leaving directory `/root/rtems-6.1-rc4/build'

'build' finished successfully (0.075s)

Waf: Entering directory `/root/rtems-6.1-rc4/build/i386/pc386'

[   1/1490] Compiling bsps/i386/shared/irq/elcr.c

[   2/1490] Compiling bsps/i386/pc386/console/serial_mouse_config.c

[   3/1490] Compiling bsps/i386/pc386/console/console_select.c

[   4/1490] Compiling bsps/i386/pc386/clock/ckinit.c

[   5/1490] Compiling bsps/i386/pc386/btimer/btimer.c

[   6/1490] Compiling bsps/i386/shared/cache/cache.c

[   7/1490] Compiling bsps/i386/pc386/start/realmode_int.c

[   8/1490] Compiling bsps/i386/pc386/console/rtd316.c

[   9/1490] Compiling bsps/i386/pc386/start/page.c

中间省略过程

[1470/1490] Compiling testsuites/samples/unlimited/test1.c

[1471/1490] Compiling testsuites/samples/unlimited/test3.c

[1472/1490] Compiling testsuites/samples/unlimited/test2.c

[1473/1490] Linking build/i386/pc386/libtftpfs.a

[1474/1490] Linking build/i386/pc386/libftpd.a

[1475/1490] Linking build/i386/pc386/testsuites/samples/base_sp.exe

[1476/1490] Linking build/i386/pc386/testsuites/samples/capture.exe

[1477/1490] Linking build/i386/pc386/testsuites/samples/hello.exe

[1478/1490] Linking build/i386/pc386/testsuites/samples/minimum.norun.exe

[1479/1490] Linking build/i386/pc386/testsuites/samples/nsecs.exe

[1480/1490] Linking build/i386/pc386/testsuites/samples/ticker.exe

[1481/1490] Linking build/i386/pc386/testsuites/samples/unlimited.exe

[1482/1490] Linking build/i386/pc386/libjffs2.a

[1483/1490] Linking build/i386/pc386/testsuites/samples/fileio.exe

[1484/1490] Linking build/i386/pc386/libdebugger.a

[1485/1490] Linking build/i386/pc386/testsuites/samples/cdtest.exe

[1486/1490] Linking build/i386/pc386/testsuites/samples/iostream.exe

[1487/1490] Linking build/i386/pc386/libz.a

[1488/1490] Linking build/i386/pc386/librtemscxx.a

[1489/1490] Linking build/i386/pc386/testsuites/samples/paranoia.exe

[1490/1490] Linking build/i386/pc386/libmghttpd.a

Waf: Leaving directory `/root/rtems-6.1-rc4/build/i386/pc386'

'build_i386/pc386' finished successfully (13.941s)

编译完成

使用QEMU运行ticker.exe

命令

qemu-system-x86_64.exe -m 1024  -kernel o:\ticker.exe

效果如下：