FreeFem++ make petsc-slepc error CentOS7

FreeFEM installation
1

I am trying to install FreeFem++ on the CentOS 7 cluster. Following the installation guide for Ubuntu the following error is found for make petsc-slepc, returns C++ compiler (/root/mpich-install/bin/mpic++) appears non-compliant with C++11.
Please help me to install it.

Petsc-error FreeFem++
Petsc-error FreeFem++1160×910 175 KB

2

You need to update your C++ compiler.

3

The system is running the following version:
g++ (GCC) 4.8.5 20150623 (Red Hat 4.8.5-16)
Copyright (C) 2015 Free Software Foundation, Inc.

4

Yes, what is not clear in my earlier answer?

5

Sir,
Thank you for your response. The system shows the latest version of GCC installed.

yum install gcc

Package devtoolset-1.1-gcc-4.7.2-5.el6.x86_64 already installed and latest version.

Can you suggest to me which version of GCC will be suitable?

6

Anything above GCC 5.0 will work. FreeFEM also requires a C++11 compiler, so you need to fix this before trying to go further.

7

Thank you very much. It worked with GCC 7.
But after that, the following error is displayed:

Checking PETSc installation…
ERROR: Unable to link with PETSc
ERROR: See “installed-arch-linux2-c-opt/lib/slepc/conf/configure.log” file for details
ERROR***********
Error building SLEPc.

Petsc-error FreeFem++1
Petsc-error FreeFem++1848×734 134 KB

8

Please share the corresponding configure.log as shown in your picture (also, do not post picture, but text instead).

9

Please find the file attached herewith.
configure.log (4.1 KB)

10

There are still old flags lying around: /usr/lib/gcc/x86_64-redhat-linux/4.8.5. Please remove all what you’ve done with the previous GCC and start from scratch.