'--with-cc=gcc-11',
    '--with-cxx=g++-11',

but I am getting, using what Jed suggests:

/Users/markadams/Codes/petsc2/include/petscsys.h:2873:29: error: '_Pragma' undeclared (first use in this function)
 2873 | #define PetscPragmaOMP(arg) _Pragma("omp " PetscStringize(arg))