ok - gfortran is using: > COLLECT_GCC_OPTIONS='-o' > '/var/folders/9w/7dlszmmn6q1gd5yf3r9n79bc0000gn/T/petsc-dk9aiv7x/config.compilers/conftest' > '-v' '-Wall' '-ffree-line-length-0' '-Wno-unused-dummy-argument' '-g' > '-mmacosx-version-min=11.2.0' '-asm_macosx_version_min=11.2' '-shared-libgcc' > '-mtune=core2'
Likely -mmacosx-version-min=11.2.0 option is causing this issue. I do not know why brew gfortran is using this option. Satish On Mon, 15 Feb 2021, Jacob Faibussowitsch wrote: > I can reproduce the warning compiling just that simple code you listed. This > is the compile command: > > mkdir -p build && gfortran -c -o ./build/conftest.o conftest.F90 && gcc -o > ./build/libconftest.dylib ./build/conftest.o -dynamiclib -undefined > dynamic_lookup && rm -rf ./build > > And error: > ld: warning: object file (./build/conftest.o) was built for newer macOS > version (11.2) than being linked (11.0) > > Note I recently uninstalled and reinstalled command line tools too, which > does not seem to have fixed it. > > Best regards, > > Jacob Faibussowitsch > (Jacob Fai - booss - oh - vitch) > Cell: (312) 694-3391 > > > On Feb 15, 2021, at 11:30, Satish Balay <[email protected]> wrote: > > > > Here is the compile command and the warning: > > > >>>>>>> > > ===== Checking linker > > Executing: gfortran -c -o > > /var/folders/9w/7dlszmmn6q1gd5yf3r9n79bc0000gn/T/petsc-dk9aiv7x/config.setCompilers/conftest.o > > > > -I/var/folders/9w/7dlszmmn6q1gd5yf3r9n79bc0000gn/T/petsc-dk9aiv7x/config.setCompilers > > > > /var/folders/9w/7dlszmmn6q1gd5yf3r9n79bc0000gn/T/petsc-dk9aiv7x/config.setCompilers/conftest.F90 > > > > Successful compile: > > Source: > > function foo(a) > > real:: a,x,bar > > common /xx/ x > > x=a > > foo = bar(x) > > end > > Executing: gcc -o > > /var/folders/9w/7dlszmmn6q1gd5yf3r9n79bc0000gn/T/petsc-dk9aiv7x/config.setCompilers/libconftest.dylib > > -dynamiclib -single_module -undefined dynamic_lookup -multiply_defined > > suppress > > /var/folders/9w/7dlszmmn6q1gd5yf3r9n79bc0000gn/T/petsc-dk9aiv7x/config.setCompilers/conftest.o > > > > Possible ERROR while running linker: > > stderr: > > ld: warning: object file > > (/var/folders/9w/7dlszmmn6q1gd5yf3r9n79bc0000gn/T/petsc-dk9aiv7x/config.setCompilers/conftest.o) > > was built for newer macOS version (11.2) than being linked (11.0) > > Accepted FC PIC code without compiler flag > > > > ============================================================================================= > > <<<<<< > > > > Its likely due to the way brew built gfortran. You can try compiling a > > simple test code and see if you can reproduce this warning. > > > > There is a related issue at: > > > > https://github.com/spack/spack/issues/21644 > > > > Satish > > > > > > On Sat, 13 Feb 2021, Jacob Faibussowitsch wrote: > > > >> Hello All, > >> > >> I’ve been getting these warnings for weeks, at first I figured it was due > >> to gfortran brew package not being updated for Big Sur, but since it has > >> persisted through a few gfortran brew updates I’m thinking it may be petsc > >> related. This is on clean build on master. > >> > >> ld: warning: object file > >> (master-arch-darwin-c-debug/obj/sys/classes/bag/f2003-src/fsrc/bagenum.o) > >> was built for newer macOS version (11.2) than being linked (11.0) > >> ld: warning: object file > >> (master-arch-darwin-c-debug/obj/sys/f90-src/fsrc/f90_fwrap.o) was built > >> for newer macOS version (11.2) than being linked (11.0) > >> ld: warning: object file > >> (master-arch-darwin-c-debug/obj/sys/objects/f2003-src/fsrc/optionenum.o) > >> was built for newer macOS version (11.2) than being linked (11.0) > >> ld: warning: object file > >> (master-arch-darwin-c-debug/obj/sys/fsrc/somefort.o) was built for newer > >> macOS version (11.2) than being linked (11.0) > >> ld: warning: object file > >> (master-arch-darwin-c-debug/obj/sys/f90-mod/petscsysmod.o) was built for > >> newer macOS version (11.2) than being linked (11.0) > >> > >> Best regards, > >> > >> Jacob Faibussowitsch > >> (Jacob Fai - booss - oh - vitch) > >> Cell: (312) 694-3391 > >> > >
