Fedora 14下建立 omap3530 开发环境 - 交叉编译器
主机升级到Fedora 14,下载了crosstool-ng-1.10.0,编译目标为 arm-cortex_a8
编译步骤:
1、直接拷贝 crosstool-ng-1.10.0/samples/arm-cortex_a8-linux-gnueabi/crosstool.config 到目标目录中的 .config
2、执行 ct-ng menuconfig 查看和校验编译选项,不做任何改动。
3、执行 ct-ng build,如果想加快编译速度,并且主机具备多核,则可以使用选项build.X来编译,其中X表示使用的线程数,一般最多为主机核心的2倍就足够。
编译并未如期通过,出现如下错误:
- [INFO ] =================================================================
- [INFO ] Installing static core C compiler
- [EXTRA] Configuring static core C compiler
- [EXTRA] Building static core C compiler
- [ERROR] make[2]: *** [cc1-dummy] Error 1
- [ERROR] make[1]: *** [all-gcc] Error 2
- [ERROR] Build failed in step 'Installing static core C compiler'
- [ERROR] Error happened in '/home/sam/devel/devkit8000/crosstool-ng/crosstool-ng-1.10.0/scripts/functions' in function 'CT_DoExecLog' (line unknown, sorry)
- [ERROR] called from '/home/sam/devel/devkit8000/crosstool-ng/crosstool-ng-1.10.0/scripts/build/cc/gcc.sh' at line # 320 in function 'do_cc_core'
- [ERROR] called from '/home/sam/devel/devkit8000/crosstool-ng/crosstool-ng-1.10.0/scripts/build/cc/gcc.sh' at line # 52 in function 'do_cc_core_pass_1'
- [ERROR] called from '/home/sam/devel/devkit8000/crosstool-ng/crosstool-ng-1.10.0/scripts/crosstool-NG.sh' at line # 606 in function 'main'
- [ERROR] Look at '/home/sam/x-tools/arm-cortex_a8-linux-gnueabi/build.log' for more info on this error.
- [ERROR] (elapsed: 10:11.57)
- [10:11] / make: *** [build] 错误 2
- [ALL ] /usr/bin/ld: cannot find -lstdc++
- [ALL ] collect2: ld returned 1 exit status
- [ERROR] make[2]: *** [cc1-dummy] Error 1
看来是链接程序找不到 libstdc++ 所致,启动ct-ng menuconfig, 进入菜单 C Compiler,可以看到
[*] Link libstdc++ statically into the gcc binary
出现如下错误:
- [INFO ] Installing C library headers
- [EXTRA] Configuring C library
- [EXTRA] Installing C library headers
- [ERROR] make[3]: *** [manual/install-headers] Error 2
- [ERROR] make[2]: *** [install-headers] Error 2
- [ERROR] Build failed in step 'Installing C library headers'
- [ERROR] Error happened in '/home/sam/devel/devkit8000/crosstool-ng/crosstool-ng-1.9.3/scripts/functions' in function 'CT_DoExecLog' (line unknown, sorry)
- [ERROR] called from '/home/sam/devel/devkit8000/crosstool-ng/crosstool-ng-1.9.3/scripts/build/libc/glibc.sh' at line # 175 in function 'do_libc_headers'
- [ERROR] called from '/home/sam/devel/devkit8000/crosstool-ng/crosstool-ng-1.9.3/scripts/crosstool-NG.sh' at line # 597 in function 'main'
- [ERROR] Look at '/home/sam/x-tools/arm-cortex_a8-linux-gnueabi/build.log' for more info on this error.
- [ERROR] (elapsed: 38:55.31)
- [38:56] / make[1]: *** [build] 错误 2
- make: *** [build.4] 错误 2
可见错误的是在编译GLIBC时发生的,打开build.log,可以看到如下错误信息:
- [ALL ] make[4]: Entering directory `/home/sam/devel/devkit8000/crosstool-ng/arm-cortex_a8/.build/src/glibc-2.9/manual'
- [ALL ] Makefile:240: *** mixed implicit and normal rules. Stop.
原来是新的Fedora 14使用的make不支持原来的显示规则和隐式规则混和的写法,后来查看make的版本从fedora13到fedora14进行了一次小升级,从3.81升级到了3.82,但就是这个小升级移除了对makefile中的显示规则和隐式规则的混和使用的支持,因此编译通不过。
为了编译通过,先将make降到Fedora13所使用的3.81版本。
yum --releasever=13 downgrade make
重新编译,顺利通过。
经验:
如果编译失败,但build.log最后看不到明显的错误信息,则可能是由于并行编译所致,并行编译在log中的记录也会被打乱顺序,致使错误信息看不准确。此时只要不使用并行编译,就会使错误信息在log中准确记录。