[petsc-users] Fortran Linker Issue on Mac Sonoma

[Satish Balay]

1. Suggest reinstalling brew/gfortran - to make sure its compatible with latest xcode you have.

https://urldefense.us/v3/__https://petsc.org/release/install/install/*installing-on-macos__;Iw!!G_uCfscf7eWS!Y7eNVqUTtBNMYgHPI9pgKFBFMZJwLjwjtp4gGnxFTyYpQMN-rfvF4wJiuZywnYU-Rof6DANF1xg1U0VLr7FgG54$ 

2. Try:

./configure --download-openmpi=https://urldefense.us/v3/__https://web.cels.anl.gov/projects/petsc/download/externalpackages/openmpi-5.0.3-xcode15.tar.gz__;!!G_uCfscf7eWS!Y7eNVqUTtBNMYgHPI9pgKFBFMZJwLjwjtp4gGnxFTyYpQMN-rfvF4wJiuZywnYU-Rof6DANF1xg1U0VLmz41ilY$ 

Satish

On Tue, 7 May 2024, William Thacher wrote:

> Hello,
> 
> I am encountering an issue when configuring/building PETSc on a Mac with
> Sonoma 14.4.1. Here are the exact steps I have performed so far:
> 
> 1. Pulled the most recent release of PETSc
> 2. Ran "./configure --ignoreLinkOutput=1 LDFLAGS=-Wl,-ld_classic"
> 
> In the configuration process (line 2518 of attached configure.log) it looks
> like there is a linker error when testing the fortran compiler. (I get the
> same error if I just run ./configure)
> 
> If I run the make command given after running step 2. above, the C/C++ code
> builds fine, but I would also like to build the Fortran code.
> 
> Have you all seen this error before on Mac Sonoma/have any ideas for a
> workaround?
> 
> I installed open-mpi through Homebrew and upgraded before building PETSc.
> 
> Appreciate the help,
> 
> Will
>