b892f72 Do not define _GNU_SOURCE

4 files Authored by lslebodn 6 years ago, Committed by mzidek 6 years ago,
    Do not define _GNU_SOURCE
    
    Let autotools to detect gnu features.
    
    Patch also prefer AC_USE_SYSTEM_EXTENSIONS to deprecated AC_GNU_SOURCE
    
    https://www.gnu.org/software/autoconf/manual/autoconf-2.67/html_node/Obsolete-Macros.html#index-AC_005fGNU_005fSOURCE-1960
    
    Reviewed-by: Michal Židek <mzidek@redhat.com>
    
    Merges: https://pagure.io/SSSD/ding-libs/pull-request/3179
    
        
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