LOL, you are definitely right about the gcc version. I am still new to conda, and pulled out whatever comes first (through some quick google search).
I will update my gcc, and let you know. -Ling From: Barry Smith <[email protected]> Date: Sunday, November 15, 2020 at 4:46 PM To: Zou, Ling <[email protected]> Cc: [email protected] <[email protected]> Subject: Re: [petsc-users] Install PETSc 3.14 with Conda type environment Ling, Configure is failing here. TESTING: checkCPreprocessor from config.setCompilers(config/BuildSystem/config/setCompilers.py:699) Locate a functional C preprocessor Checking for program /Users/lzou/miniconda3/bin/gcc...found Defined make macro "CPP" to "gcc -E" Preprocessing source: #include "confdefs.h" #include "conffix.h" #include <stdlib.h> Executing: gcc -E -I/var/folders/fd/yx1jblsj2rzb981kx8ksm03ssqvm65/T/petsc-2jvhontx/config.setCompilers /var/folders/fd/yx1jblsj2rzb981kx8ksm03ssqvm65/T/petsc-2jvhontx/config.setCompilers/conftest.c Possible ERROR while running preprocessor: exit code 1 stdout: # 1 "/var/folders/fd/yx1jblsj2rzb981kx8ksm03ssqvm65/T/petsc-2jvhontx/config.setCompilers/conftest.c" So for some reason the gcc -E seems to work correctly but produces an non-zero exit code? I notice something very concerning in your Conda environment. It seems to have a gcc (GCC) 4.8.5 which is more ancient than my son who is in college. I cannot imagine you would want to use such an old compiler. Perhaps if you upgrade the Conda environment to use a recent gcc then the other problem will go away. Please give that a try and let us know how it goes, send configure.log again if configure still fails. Good luck, Barry Locate a functional C compiler Checking for program /Users/lzou/miniconda3/bin/gcc...found Executing: gcc --version stdout: gcc (GCC) 4.8.5 Copyright (C) 2015 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. On Nov 15, 2020, at 4:27 PM, Zou, Ling via petsc-users <[email protected]<mailto:[email protected]>> wrote: Hi, I have installed PETSc many times before, so not so new to it. Recently, I have switched to conda system to manage my working environment, and would like to reinstall PETSc, and had some issue during the ‘config’ stage: ******************************************************************************* UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log for details): ------------------------------------------------------------------------------- Cannot find a C preprocessor ******************************************************************************* Config file is also attached. Appreciate your help. -Ling <configure.log>
