Install not working on Mac

[brownbaerchen]

I am trying to install firedrake, but petsc will not build. I am using a homebrew python without conda. However, I am unable to get rid of some conda environment variables from past installations for some reason.
The error message in the firedrake install log is

*********************************************************************************************
           UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log for details):
---------------------------------------------------------------------------------------------
  Using C++ dialect C++11 as lower bound due to package(s):
  - SuperLU_DIST
  - hypre
  - SuiteSparse
  But C++ compiler (g++) appears non-compliant with C++11 or didn't accept:
  - -std=gnu++20
  - -std=c++20
  - -std=gnu++17
  - -std=c++17
  - -std=gnu++14
  - -std=c++14
  - -std=gnu++11
  - -std=c++11
*********************************************************************************************

Please find the firedrake install log and petsc configure log attached.
Help would be greatly appreciated!

configure.log
firedrake-install.log

[Ig-dolci]

Firedrake installs using conda is an anti-requirement. You must deactivate the conda from your terminal.

[brownbaerchen]

Rebooting got rid of the environment variables and conda. So this is one problem solved. However, the error is still the same.
configure.log
firedrake-install.log

[connorjward]

This is odd. There appears to be something wrong with your C++ compiler. How recently did you update your XCode/command line tools and your homebrew?

Please share the output of

$ which g++
$ g++ --version
$ which clang++
$ clang++ --version

(the bottom two of those may not work)

[brownbaerchen]

I updated just now. The output I get is

/usr/bin/g++
Apple clang version 16.0.0 (clang-1600.0.26.6)
Target: arm64-apple-darwin23.6.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
/usr/bin/clang++
Apple clang version 16.0.0 (clang-1600.0.26.6)
Target: arm64-apple-darwin23.6.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

[connorjward]

Can you try compiling a file only containing the line

#include <memory>

with

$ g++ -c myfile.cc

For reference the configure checks are failing because it is trying to compile

#include "confdefs.h"
#include "conffix.h"

// c++11 includes
#include <memory>
#include <random>
#include <complex>
#include <iostream>
#include <algorithm>

template<class T> void ignore(const T&) { } // silence unused variable warnings
class valClass
{
public:
  int i;
  valClass() { i = 3; }
  valClass(int x) : i(x) { }
};

class MoveSemantics
{
  std::unique_ptr<valClass> _member;

public:
  MoveSemantics(int val = 4) : _member(new valClass(val)) { }
  MoveSemantics& operator=(MoveSemantics &&other) noexcept = default;
};

template<typename T> constexpr T Cubed( T x ) { return x*x*x; }
auto trailing(int x) -> int { return x+2; }
enum class Shapes : int {SQUARE,CIRCLE};
template<class ... Types> struct Tuple { };
using PetscErrorCode = int;

int main(void) {

// c++11 body
valClass cls = valClass(); // value initialization
int i = cls.i;             // i is not declared const
const int& rci = i;        // but rci is
const_cast<int&>(rci) = 4;

constexpr int big_value = 1234;
decltype(big_value) ierr = big_value;
auto ret = trailing(ierr);
MoveSemantics bob;
MoveSemantics alice;
alice = std::move(bob);ignore(alice);
Tuple<> t0;ignore(t0);
Tuple<long> t1;ignore(t1);
Tuple<int,float> t2;ignore(t2);
std::random_device rd;
std::mt19937 mt(rd());
std::normal_distribution<double> dist(0,1);
const double x = dist(mt);
std::cout << x << ret << std::endl;
std::vector<std::unique_ptr<double>> vector;
std::sort(vector.begin(), vector.end(), [](std::unique_ptr<double> &a, std::unique_ptr<double> &b) { return *a < *b; });

  return 0;
}

with the command

g++ -c -o /var/folders/zl/pxyz2x2x591c234cc02rcn_40000gn/T/petsc-2nn34ikf/config.setCompilers/conftest.o -I/var/folders/zl/pxyz2x2x591c234cc02rcn_40000gn/T/petsc-2nn34ikf/config.setCompilers   -std=gnu++11   /var/folders/zl/pxyz2x2x591c234cc02rcn_40000gn/T/petsc-2nn34ikf/config.setCompilers/conftest.cc 

[brownbaerchen]

This gives the same error:

g++ -c myfile.cc 
myfile.cc:1:10: fatal error: 'memory' file not found
    1 | #include <memory>
      |          ^~~~~~~~
1 error generated.

So that means there is something wrong with my compiler?

[brownbaerchen]

In this issue on nodejs, they figured out that this appears after updating the Xcode command line tools to version 16 and can be fixed by reinstalling from scratch. Now I can compile #include <memory>.
However, I am now running into the issue described here. The solution you found there is to downgrade Xcode. How do I do that?

[Ig-dolci]

To avoid Xcode downgrading, try to modify the following line in the Firedrake firedrake-install script:

Replace:

petsc_options.add("--CFLAGS=-Wno-implicit-function-declaration")

With:

petsc_options.add("--CFLAGS=-Wno-implicit-function-declaration")
petsc_options.add("--CXXFLAGS=-std=c++17")

These changes have been worked.

[brownbaerchen]

That did the trick, thank you so much!

[jshipton]

[celebrate] Shipton, Jemma reacted to your message:

…

________________________________ From: Thomas Baumann ***@***.***> Sent: Monday, January 6, 2025 4:14:53 PM To: firedrakeproject/firedrake ***@***.***> Cc: Subscribed ***@***.***> Subject: Re: [firedrakeproject/firedrake] Install not working on Mac (Discussion #3952) CAUTION: This email originated from outside of the organisation. Do not click links or open attachments unless you recognise the sender and know the content is safe. That did the trick, thank you so much! — Reply to this email directly, view it on GitHub<#3952 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ABUOTSQQBSEPP3LCSCX4DVD2JKTX3AVCNFSM6AAAAABUVKCLE2VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTCNZVGA4DSMA>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>