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


    Sure - compile each source file to an object file, and then link all of the object files to form the executable. Objects can both import and export symbols, so that should be no problem. For each file changed you should have to recreate a single object and then just rerun the link step.

    Thanks  for the replay isogen..
    do you mean that while linking each object file's unresolved symbols would be referred from elf..

    if so,it would be great if u share the linking command/any tutorial where i can refer it.

Reply
  • Note: This was originally posted on 18th April 2011 at http://forums.arm.com


    Sure - compile each source file to an object file, and then link all of the object files to form the executable. Objects can both import and export symbols, so that should be no problem. For each file changed you should have to recreate a single object and then just rerun the link step.

    Thanks  for the replay isogen..
    do you mean that while linking each object file's unresolved symbols would be referred from elf..

    if so,it would be great if u share the linking command/any tutorial where i can refer it.

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