I upgraded my macbook to Sonoma 14.0 then my iFort won't work!

Upgrade to the most current Intel Fortran Classic version, and try again.

If you are running the current 2023.2.1 Build, Contact Intel Support for assistance with Intel Fortran.

The system requirements don’t list macOS 14 Sonoma as supported:

https://www.intel.com/content/www/us/en/developer/articles/system-requirements/oneapi-fortran-compiler-system-requirements.html

Per Intel, you’re seemingly also headed for some sort of migration:

macOS support is deprecated for Intel® Fortran Compiler Classic (ifort) in the oneAPI 2023.1 release. macOS support for Intel® Fortran Compiler Classic (ifort) will not be available starting with the oneAPI 2024.0 release.

Intel oneAPI Base Toolkit for macOS on x86 is now deprecated and will be discontinued in the 2024.0 release. Several Intel-led open source developer tool projects will continue supporting macOS on Apple Silicon including oneAPI Threading Building Blocks (oneTBB) and Intel® Implicit SPMD Program Compiler and we welcome the opportunity to work with contributors to expand support to additional tools in the future.

Intel oneAPI HPC Toolkit for macOS on x86 is now deprecated and will be discontinued in the 2024.0 release. Several Intel-led open source developer tool projects will continue supporting macOS on Apple Silicon including oneAPI Threading Building Blocks (oneTBB) and Intel® Implicit SPMD Program Compiler and we welcome the opportunity to work with contributors to expand support to additional tools in the future.

As an alternative to Intel Fortran, I’ve successfully used gfortran for some work, though not recently:

https://github.com/fxcoudert/gfortran-for-macOS/releases

Syntax details and extensions can differ.

Okay, part of that looks to be a known bug:

https://www.mail-archive.com/gcc-bugs@gcc.gnu.org/msg785716.html

Looks like the developer with that switch change might have been at Apple too, not at gcc/gfortran.

The other error looks to be Homebrew, based on this:

https://github.com/orgs/Homebrew/discussions/4794#discussioncomment-7117550

A workaround for Xcode 15 looks to be adding the following switches:

-Wl,-ld_classic

Check whatever build script is being used for building that code, and fix the two switches shown.

1: Some gcc/gfortran developer decided to change that switch name without just leaving the old name as a synonym. Some developer decided to change a switch name and emit a diagnostic for the old switch that does the same thing, rather than silently just doing what was expected. That switch will have to be changed to suppress that message.

2: It appears there are two references in the linked objects to the same library in the gfortran command. Basically, a duplicate library reference. That is usually an explicit reference on the compile command, or can be hidden in an alias for the compiler command, or can be loaded from somewhere during the compile, depending on the arcaneness rating of the build script. Anything using autoconf tends to be somewhere out past arcane, too. Look underneath whatever that gfnew script or alias might be.

As I'm guessing this probably isn't your Fortran code and your build script (gfnew?), check for source and build updates from whoever is maintaining it, and check for build switches that might be used for selecting a particular compiler.

Welcome to porting Fortran and its build scripts around.

Fortran itself has a few gnarly bits, particularly if the code is old enough. FORTRAN code (FORTRAN code, as differentiated from Fortran code) using syntax from prior to about F90 tends to be gnarly. Code with vendor extensions, too. And some build scripts and some build script tooling... shudder.

Looks like the deprecation hit with 2023.2.1, not after, and the latest download is 2023.2.0:

https://www.intel.com/content/www/us/en/developer/tools/oneapi/fortran-compiler.html#gs.66c9v3

Got questions, best check with Intel.

I have to add "-Wl" before "-no_warn_duplicate_libraries" then it works, thanks

/Users/tzhang/Disk> gfnew -Wl,-no_warn_duplicate_libraries test.f

-macosx_version_min has been renamed to -macos_version_min

The gfortran version I'm running is now very old, and was mildly annoying to get it to build and work.

If I was re-starting the local Fortran development work on macOS—that work is happening else-platform—I'd start with the pre-built version I've previously linked: https://github.com/fxcoudert/gfortran-for-macOS/releases

If that fails, I'd next look at Flang (though that's very new, is "not ready yet for production usage", and is not something I've used as yet): https://github.com/llvm/llvm-project/tree/main/flang

Installing gfortran via Homebrew would be the next stop. gcc is, however, enormous and complex and fiddly.*

*Clang, Flang, and LLVM are also enormous, complex, and fiddly.

"-macosx_version_min has been renamed to -macos_version_min" is the only remaining warning message after " -Wl,-ld_classic" is applied.

  "-no_warn_duplicate_libraries" suppress the above warning?

And here's how to suppress the other one:

-no_warn_duplicate_libraries

Which linker are you using? Probably either the GNU linker or maybe an Intel linker, and probably not the LLVM linker:

https://indiestack.com/2023/10/xcode-15-duplicate-library-linker-warnings/

If there’s no analog in GCC and gfortran, check with the folks supporting gfortran and the GNU ld.

MrHoffman: I can not find ifort compiler 2023.2.1 Build dmg file in the link you provide.

Could you direct me how to download the source code (dmg) file for ifort compiler 2023.2.1 ?

Thanks

Thanks. What gfortran version are you using in Sonoma ? https://github.com/fxcoudert/gfortran

"gfnew" is just the alias of gfortran with some flags

MacBook-Pro-2:~ 33;which gfnew

gfnew: aliased to gfortran -m64 -ffixed-line-length-0 -finit-local-zero -fbounds-check

code is pretty simple, just a test.

test.f

------------

C

a=1.0

b=2.0

c=a+b

write(*,*)'c= ',c

stop

end

Thanks, looks like the second warning message is gone.

gfnew -Wl,-ld_classic test.f

-macosx_version_min has been renamed to -macos_version_min

gfnew -no_warn_duplicate_libraries test.f

gfortran: error: unrecognized command-line option '-no_warn_duplicate_libraries'