c++ - How to Check the Version of my gcc? - 


in file included /usr/include/c++/4.8.2/locale:41:0,                  /usr/include/c++/4.8.2/iomanip:43,                  [...omitted myself irrelevant] /usr/include/c++/4.8.2/bits/locale_facets_nonio.h:59:39: error: ‘locale’ has not been declared      struct __timepunct_cache : public locale::facet

above first error in build log.

i didn't try compile glibc/gcc myself, , installed them via yum.

one fishy thing found is:

$ ll /usr/include/c++/ total 4 drwxr-xr-x. 12 root root 4096 dec 17 14:16 4.8.2 lrwxrwxrwx   1 root root    5 dec 17 14:16 4.8.5 -> 4.8.2 $

and yum showed 1 version of gcc:

$ yum info gcc-c++ loaded plugins: fastestmirror, langpacks loading mirror speeds cached hostfile  * base: centos.uhost.hk  * epel: mirrors.hustunique.com  * extras: centos.uhost.hk  * updates: centos.uhost.hk installed packages name        : gcc-c++ arch        : x86_64 version     : 4.8.5 release     : 4.el7 size        : 16 m repo        : installed repo   : base summary     : c++ support gcc url         : http://gcc.gnu.org license     : gplv3+ , gplv3+ exceptions , gplv2+ exceptions , lgplv2+ , bsd description : package adds c++ support gnu compiler collection.             : includes support of current c++ specification,             : including templates , exception handling.

any idea how verify headers in /usr/include/c++/4.8.2 indeed 4.8.5 package?

thanks in advance.

p.s. think glibc irrelevant here info:

$ ldd --version ldd (gnu libc) 2.17 copyright (c) 2012 free software foundation, inc. free software; see source copying conditions.  there no warranty; not merchantability or fitness particular purpose. written roland mcgrath , ulrich drepper.

the symlink 4.8.2 directory nothing worry about, it's normal libstdc++ headers on red hat enterprise linux (and therefore centos) arranged that.

gcc --version tell version of gcc executable in path.

rpm -q libstdc++-devel tell version of package owns c++ standard library headers.

rpm -ql libstdc++-devel list files installed package, include files under /usr/include/c++/4.8.2

rpm --verify libstdc++-devel check haven't messed c++ headers replacing them else.

the error more concerning, implies have messed something up. guess it's in from [...omitted myself irrelevant] part, may relevant. std::locale should declared in <bits/locale_classes.h> included before <bits/locale_facets_nonio.h>, if wasn't declared guess have header defines _locale_classes_h , prevents standard library header being read. not define include guards start underscores, reserved names.


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