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[develop] Added environment variable LDFLAGS on macOS as requested by the corresponding module file #729

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May 1, 2023
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[develop] Added environment variable LDFLAGS on macOS as requested by the corresponding module file #729

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3677147
Added environment variable LDFLAGS on macOS as requested by the corre…
ywangwof Apr 13, 2023
eb77115
Changed to append to LDFLAGS but not replace
ywangwof Apr 14, 2023
82f1276
Modified changes based on comments
ywangwof Apr 17, 2023
a1c2543
Modify modulefiles/build_macos_gnu.lua based on comments from Natelie
ywangwof Apr 28, 2023
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2 changes: 1 addition & 1 deletion devbuild.sh
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Suggesting changes to the modulefile build_macos_gnu.lua instead of adding conditionals to devbuild.sh
Lines 59-65 of build_macos_gnu.lua to be changed to a single line adding a flag to the existing ones (note "+=" instead of "=", and spaces before "L" and after "lib")

export LDFLAGS+=" -L$MPI_ROOT/lib "

Another change that is needed for build_macos_gnu.lua in lines 49-50:

setenv("CMAKE_Platform", "macosx.gnu")
--setenv("CMAKE_Platform", "macosx.intel")

instead of "macos.<compiler>".
The ufs-weather-model expects "macosx.<compiler>" as a platform name, and it has ufs-weather-model/cmake/configure_macosx.gnu.cmake and configure_macosx.intel.cmake platform-dependent configuration files.

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@ywangwof ywangwof Apr 14, 2023 •
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  1. export LDFLAGS+=" -L$MPI_ROOT/lib " does not work in a Lua module file. Note that it is a shell command.
  2. If we change the platform name inside the module file, build_macos_gnu.lua, the file name should also be changed to build_macosx_gnu.lua to be consistent. And all other scripts that mentioned build_macos_gnushould also be changed.

It will be involved too many modifications and is error prone. I prefer to leaving it to the next major version update? My current modification is not perfect, but it requests the minimal changes that make the script devbuild.sh work on the macOS platform.

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@ywangwof -
Thank you for your responses!

  1. Yes, indeed this will not work as in the bash shell. Even if we use Lua syntax, such as
    append_path (”LDFLAGS”, “ -L$MPI_ROOT/lib ", “ ”)
    it will not work either, because the $MPI_ROOT could only be expanded after the modulefile is loaded; it is not yet available inside the modulefile.

Your solution to modify devbuild.sh is then a good option. My only suggestion is to use a conditional based on a $PLATFORM variable, because we may have other compilers Intel, Clang. The line 452 in devbuild.sh then would be:
if [[ "${PLATFORM}" == "macos" ]]; then

  1. Agree. If a platform+compiler naming for the SRW differs from that for the UFS-WM, but still works for the SRW system, it's OK to leave it unchanged.

  2. Modulefiles build_macos_gnu.lua may still need a correction to the syntax for the export LDFLAGS string, suggesting:

if mode() == "load" then
  LmodMsgRaw([===[
   Please export env. variable LDFLAGS after the module is successfully loaded:
        export LDFLAGS+=" -L$MPI_ROOT/lib "
  ]===])
end

Original file line number Diff line number Diff line change
Expand Up @@ -450,7 +450,7 @@ else
module use ${SRW_DIR}/modulefiles
module load ${MODULE_FILE}
if [[ "${MODULE_FILE}" == "build_macos_gnu" ]]; then
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@natalie-perlin natalie-perlin Apr 14, 2023 •
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Suggesting the following for the line 452:
if [[ "${PLATFORM}" == "macos" ]]; then

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Thanks for your comments. The modifications are committed as you suggested. Please review them again.

export LDFLAGS="-L$MPI_ROOT/lib "
export LDFLAGS+=" -L$MPI_ROOT/lib "
fi
fi
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