[svn-r26633] Add -D_DEFAULT_SOURCE to CPPFLAGS on Linux systems. -D_BSD_SOURCE is deprecated

in recent versions of glibc, and -D_DEFAULT_SOURCE is the replacement.  Keep
-D_BSD_SOURCE for now to support older systems.  gcc will not issue a warning
about -D_BSD_SOURCE being deprecated when -D_DEFAULT_SOURCE is supplied as well.

Tested: jam, koala, ostrich (h5committest)

1 files changed, 5 insertions, 0 deletions

diff --git a/configure b/configure
index a272c8d..6863855 100755
--- a/configure
+++ b/configure
@@ -22929,6 +22929,11 @@ case "$host_cpu-$host_vendor-$host_os" in
     ## however, we do not do this since it breaks the big test on some
     ## older platforms.
     H5_CPPFLAGS="-D_BSD_SOURCE $H5_CPPFLAGS"
+
+    ## _BSD_SOURCE is deprecated as of glibc 2.20, in favor of _DEFAULT_SOURCE.
+    ## To avoid warnings, we define _DEFAULT_SOURCE in addition to _BSD_SOURCE,
+    ## which should work for all versions of glibc.
+    H5_CPPFLAGS="-D_DEFAULT_SOURCE $H5_CPPFLAGS"
     ;;
 esac