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-rw-r--r--configure.ac5
1 files changed, 5 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 75d6d76..919defa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1048,6 +1048,11 @@ 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