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ARM Compilers: refer external symbols from elf

Pavan Kumar R
Note: This was originally posted on 18th April 2011 at http://forums.arm.com

HI guys,



is it possible to compile a source file where the external symbols should be referred in the elf (elf for whole build) by ARM compiler/Linker.

we use compilers :ADS120 ,RVCT3.1,RVCT4.1

Scenario :

Build consist of all the source, we make build by integrating  this source file/changes and we compile whole build. so if there is any compilation/link error with integrated source file/changes we will able to know after whole build is compiled .
i want to optimize this process,by compiling only changed files before integrating in the whole build ,where external symbols should be referred in elf (generated for whole build(previous  successful build)). Once it compiled successfully i can integrated in build and compile.so by this process i will be able to resolve the errors in very less time.

Thanks for reading the post.
Parents
  • Note: This was originally posted on 21st April 2011 at http://forums.arm.com

    So basically what you are looking for is a way to link an object to an image in a way that all symbol references in this new object replace existing symbol references of inside the image. Even if this were technically possible (which I doubt for the general case anyway), I don't think it would actually save time. The linker would have to decompose the image and reassign all relocations. What about removed sections, which might suddenly be referenced from the new objects?

    Since you  have to support a number of tool versions, partial linking doesn't appear to be an option either.

    Good luck
    Marcus
Reply
  • Note: This was originally posted on 21st April 2011 at http://forums.arm.com

    So basically what you are looking for is a way to link an object to an image in a way that all symbol references in this new object replace existing symbol references of inside the image. Even if this were technically possible (which I doubt for the general case anyway), I don't think it would actually save time. The linker would have to decompose the image and reassign all relocations. What about removed sections, which might suddenly be referenced from the new objects?

    Since you  have to support a number of tool versions, partial linking doesn't appear to be an option either.

    Good luck
    Marcus
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