IMX8 Cross-compilation "unrecognized option '-Wl,-O1'"

[1042484520]

Dear NXP:

   为什么用yocto编译的IMX8的Tool chain不支持LDFLAGS="-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed"的参数？

   在交叉编译内核的时候会报错：

   aarch64-fslc-linux-ld: unrecognized option '-Wl,-O1'
   aarch64-fslc-linux-ld: use the --help option for usage information
   scripts/Makefile.build:534: recipe for target 'drivers/firmware/efi/libstub/lib-ksyms.o' failed
   make[4]: *** [drivers/firmware/efi/libstub/lib-ksyms.o] Error 1
   scripts/Makefile.build:587: recipe for target 'drivers/firmware/efi/libstub' failed
   make[3]: *** [drivers/firmware/efi/libstub] Error 2
   make[3]: *** Waiting for unfinished jobs....

[joanxie]

hope this link is helpful for you

"arm-angstrom-linux-gnueabi-ld: -Wl,-O1: unknown option" when trying to build Linux Kernel from Sour... 

[1042484520]

Hi Joan:

   unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE

   上述unset操作是否会对内核的编译速度、优化程度造成一定的影响？


Thanks!

[joanxie]

to be honest, I'm not sure for this, I think unsetting these flags maybe affect the performance

[1042484520]

Hi Joan：

      那关于aarch64-fslc-linux-ld: unrecognized option '-Wl,-O1'问题有什么官方的解决方案吗？

Thanks！

[joanxie]

for using toolchain, suggest that you can use this as below:

Task #7 - Create the toolchain 

https://community.nxp.com/docs/DOC-95225