Unable to create a local build on CentOS7 about openroad-flow-scripts

[rovinski]

Your compiler is identified as GCC 4 whereas 7+ is required. See #146 (comment).

[paulgutwin]

Hello Austin - thank you very much for the pointer. I (stupidly) overlooked the need to enable GCC 8 and CLANG 7. My build is now successful.

[vvbandeira]

@paulgutwin, happy to know that you were able to build. Out of curiosity, during your first try, did you ever got to our Getting Started docs page and was it clear? Just asking to know if there's anything we can clarify in the docs to make things better. Thanks.

[rovinski]

It is possible to give better error messages with something like

if (CMAKE_COMPILER_IS_GNUCC AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7)
    message(FATAL_ERROR "OpenROAD requires GCC 7 or greater.")
endif()

But that is not as robust as CXX_STANDARD_REQUIRED which we currently use.

[vvbandeira]

@rovinski can we use both? check first for the version then for std. req.?

[paulgutwin]

@vvbandeira yes, I was using the Getting Started instructions. However, just before the warning regarding enabling GCC-8/CLANG-7, there is a link Build from sources locally which of course I followed. Since that page also has instructions regarding verifying the build, I didn't think to go back to the "Getting Started" page.

I think that my issue would have been avoided had the warning been repeated on the "Build from sources locally" page.