[petsc-users] Issues with PETSc Configuration using gfortran-13 after Updating to Xcode 15 on MacOS Ventura 13.6

[Barry Smith]

  Please send configure.log to petsc-maint at mcs.anl <mailto:petsc-maint at mcs.anl>.gov

> On Sep 24, 2023, at 5:59 AM, Felipe Caro <msc.felipe.caro at gmail.com> wrote:
> 
> Hello PETSc Support Team,
> 
> I hope this email finds you well. I need help configuring PETSc on my Mac running MacOS Ventura 13.6 with Xcode 15. I have recently updated my operating system and Xcode and am facing issues setting up PETSc with gfortran-13. 
> 
> Thank you for your assistance.
> 
> System Information
> MacOS Version: Ventura 13.6
> Xcode Version: 15
> gfortran Version: 13 (installed via Homebrew)
> PETSc Version: [Your PETSc Version]
> Steps to Reproduce
> I followed the standard installation steps as outlined in the PETSc documentation. Below is the relevant section of the Bash script I used for configuration:
> 
> #!/bin/bash
> 
> # PETSc environment variables
> export PETSC_DIR=/path/to/petsc
> export PETSC_ARCH=arch-cmplx-opt
> 
> # Configuration
> cd $PETSC_DIR
> ./configure --with-cc=gcc-13 --with-cxx=g++-13 --with-fc=gfortran-13 --with-f90=gfortran-13 \
>   --with-debugging=no --with-scalar-type=complex --with-openmp \
>   --download-mpich --download-fblaslapack --download-scalapack \
>   --download-mumps --download-metis --download-parmetis --download-hwloc \
>   COPTFLAGS="-O3" CXXOPTFLAGS="-O3" FOPTFLAGS="-Ofast" $PETSC_ARCH
> 
> Error Message
> The configure script throws the following error:
> 
> UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log for details):
> Fortran compiler you provided with --with-fc=gfortran-13 cannot be found or does not work.
> Cannot compile/link FC with gfortran-13.
> 
> To verify if gfortran-13 is working, I tested it by compiling a simple Fortran program, and it worked despite a linker warning related to duplicate libraries.
> Additional Information
> I also ran brew doctor to ensure my Homebrew setup was fine and no issues were found.
> Can you guide me on how to resolve this issue? I can also provide the configure.log file if that would be helpful for debugging.
> Thank you for your time and assistance.
> 
> Best regards,
> Felipe.

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