[CMake] How to specify Redhat Developer Toolset compiler?

[Jim Melton]

I fought with this and ended up with the below approach. Note that these values are cached, so you must start with a clean build directory before changing. Assuming your desired versions are on your path:

CC=$(which gcc) CXX=$(which g++) cmake3 <other args to cmake>

---
Jim Melton
Principal Software Engineer
Sierra Nevada Corporation


-----Original Message-----
From: CMake <cmake-bounces at cmake.org> On Behalf Of Andreas Naumann
Sent: Thursday, June 20, 2019 09:52
To: CMake MailingList <cmake at cmake.org>
Subject: [EXTERNAL] Re: [CMake] How to specify Redhat Developer Toolset compiler?

You could set the environment variables CXX and CC such that they point to your toolset compiler

Am 20.06.19 um 17:39 schrieb David Aldrich:
> My Centos 7.6 machine has CMake 3.13.5 and g++ 4.8.5 installed:
>
> $ /usr/bin/x86_64-redhat-linux-g++ --version x86_64-redhat-linux-g++ 
> (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36)
>
> I have a very simple CMakeLists.txt:
>
> cmake_minimum_required(VERSION 3.5 FATAL_ERROR) project(hello_world 
> LANGUAGES CXX)
>
> add_executable(hello_world "")
>
> target_sources(hello_world
>   PRIVATE
>     main.cpp
>     Message.hpp
>     Message.cpp)
>
> I also have Redhat Developer Toolset 7 installed which I can enable in 
> my bash shell:
>
> $ scl enable devtoolset-7 bash
> $ which g++
> /opt/rh/devtoolset-7/root/usr/bin/g++
> $ g++ --version
> g++ (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)
>
> How can I get CMake to use the later version of g++ instead of 4.8.5?
>
>

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