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10287 :: Building 1.6 on RHEL 7 on POWER (pp64le)?

• cheekm (orginal) [2023-06-19T22:22:22+02:00] view original

  I'm trying to bootstrap nim v1.6.x on a RHEL 7 server running on IBM POWER9 ppc64lc hardware. Unfortunately, all I have is gcc 4.8.5. (Ancient, I know.) I'm getting the "undefined reference to __builtin_saddll_overflow" messages at the link step when running "sh build.sh".

  I searched the forum a lot and see references to "compiling with -d:nimEmulateOverflowChecks". Or using a newer gcc or clang.

  I AM able to successfully build nim-1.2.6 but nothing later.

  Does having a running nim-1.2.6 help me get further along? i.e., build a later version?

  Any suggestions about how to "compile with -d:nimEmulateOverflowChecks"? I'm unfamiliar with nim but am learning.

  Thanks, Matt

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• Araq (orginal) [2023-06-20T09:07:39+02:00] view original

  Well you need to compile with -d:nimEmulateOverflowChecks. :P

  The best idea is probably to use a 1.6 Nim on Linux to generate csources for 1.6 with -d:nimEmulateOverflowChecks and then move the csources to your RHEL 7 machine and bootstrap from these custom csources.

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• cheekm (orginal) [2023-06-20T17:06:12+02:00] view original

  Thanks for the reply.

  I downloaded the 1.6.12 source and successfully built it on a RHEL 8 server on x86_64. I then ran this command:

  ./koch csource -d:nimEmulateOverflowChecks

  This was successful.

  I then tar-ed up the whole nim-1.6.12 dir, copied it over to my RHEL 7 on ppc64le and tried "sh build.sh" and it still fails with the "__builtin_saddll_overflow" messages at link time.

  What steps have I missed or done incorrectly?

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• rockcavera (orginal) [2023-06-20T21:39:43+02:00] view original

  Do the following since you have 1.6.12 on RHEL 8 server x86_64. Go to the Nim folder where the .nim compiler source code is and edit the installer.ini file, removing the platforms you don't want. In your case, it should just be linux: powerpc64el, if I'm not wrong.

  
  ; This config file holds configuration information about the Nim compiler
  ; and project.
  
  [Project]
  Name: "Nim"
  Version: "$version"
  Platforms: """
    linux: powerpc64el
  """
  
  Authors: "Andreas Rumpf"
  Run

  Now do: koch csource -d:danger -d:nimEmulateOverflowChecks

  Take the output from build/ and bring it to your RHEL 7 ppc64le environment. Just build by build.sh or makefile.

  The platform removal part of installer.ini aims to shorten the time to produce csource. I know of no other method other than manual removal.

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• cheekm (orginal) [2023-06-21T17:35:35+02:00] view original

  Thank you for the response. Still no success.

  Here's what I did:

  1. Unpacked 1.6.2 source on target RHEL 7/ppc64le server
  2. Built 1.6.2 from source on a RHEL 8/x86_64 server
  3. Edited the ./compiler/installer.ini to remove all but powerpc64el
  4. ./koch csource -d:danger -d:nimEmulateOverflowChecks # completed successfully
  5. Copied over entire ./c_code subdir to target server
  6. build.sh or make still unable to link w/ "undefined reference to __builtin_saddll_overflow'" errors.

  Am I misinterpreting your suggestion about copying over output of "koch csource"?

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• rockcavera (orginal) [2023-06-22T01:46:04+02:00] view original

  Here I managed to successfully compile on Windows 10, amd64 and gcc 4.8.1. Yes, I did the steps I gave you.

  Something that can be checked is the .c files, from csource, if they have #define NIM_EmulateOverflowChecks, because __builtin_saddll_overflow is passed by nimbase.h.

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• rockcavera (orginal) [2023-06-22T04:51:10+02:00] view original

  
  5. Copied over entire ./c_code subdir to target server
  Run

  I believe that here is your mistake. You are copying the c_code folder, which is already precompiled from the downloaded source code. The C source code created with koch csource -d:danger -d:nimEmulateOverflowChecks lives in the ./build folder. So delete the ./build folder and redo the procedure and copy the ./build folder to the ppc64le destination

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• cheekm (orginal) [2023-06-22T20:45:15+02:00] view original

  That did it. I copied over the ./build subdir to the ppc64le box and ran the build.sh that had been created inside ./build.

  $ nim --version Nim Compiler Version 1.6.12 [Linux: powerpc64el] Compiled at 2023-06-22 Copyright (c) 2006-2023 by Andreas Rumpf

  active boot switches: -d:release

  Thank you for your help.

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