Compile c 14-code with g

Question

I m using g   4 8 4 on Ubuntu 14 04 LTS  When trying to compile with  -std c  14   I get this error   g    error unrecognized command line option  -std c  14    Compiling with  -std c  11  works fine  so I m not sure what s going on  Does g   really have no support for c  14 yet  Am I using a wrong command line option   I used  sudo apt-get install g    which should automatically retrieve the latest version  is that correct

User · Answer

The -std c  14 flag is not supported on GCC 4 8   If you want to use C  14 features you need to compile with -std c  1y   Using godbolt org it appears that the earilest version to support -std c  14 is GCC 4 9 0 or Clang 3 5 0

User · Answer

G   does support C  14 both via -std c  14 and -std c  1y  The latter was the common name for the standard before it was known in which year it would be released  In older versions  including yours  only the latter is accepted as the release year wasn t known yet when those versions were released      I used  sudo apt-get install g    which should automatically retrieve the latest version  is that correct    It installs the latest version available in the Ubuntu repositories  not the latest version that exists   The latest GCC version is 5 2

User · Answer

For gcc 4 8 4 you need to use -std c  1y in later versions  looks like starting with 5 2 you can use -std c  14   If we look at the gcc online documents we can find the manuals for each version of gcc and we can see by going to Dialect options for 4 9 3 under the GCC 4 9 3 manual it says         c  1y              The next revision of the ISO C   standard  tentatively planned for 2014  Support is highly experimental  and will almost certainly change in incompatible ways in future releases        So up till 4 9 3 you had to use -std c  1y while the gcc 5 2 options say         c  14         c  1y              The 2014 ISO C   standard plus amendments  The name    c  1y    is deprecated        It is not clear to me why this is listed under Options Controlling C Dialect but that is how the documents are currently organized

User · Answer

Follow the instructions at https   gist github com application2000 73fd6f4bf1be6600a2cf9f56315a2d91 to set up the gcc version you need - gcc 5 or gcc 6 - on Ubuntu 14 04   The instructions include configuring update-alternatives to allow you to switch between versions as you need to

[c++] Compile c++14-code with g++

Examples related to c++

Examples related to g++

Examples related to ubuntu-14.04

Examples related to c++14