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-rw-r--r--hw4/configure.ac2
1 files changed, 2 insertions, 0 deletions
diff --git a/hw4/configure.ac b/hw4/configure.ac
index 255a1b0..2c16ab5 100644
--- a/hw4/configure.ac
+++ b/hw4/configure.ac
@@ -9,6 +9,8 @@ AC_CONFIG_HEADERS([config.h])
AM_INIT_AUTOMAKE([foreign])
AM_SILENT_RULES([yes])
+AC_DEFINE([_POSIX_C_SOURCE], [200809L], [Enable POSIX.1-2008 support])
+AC_DEFINE([_XOPEN_SOURCE], [700], [Enable X/OPEN system interfaces])
# Checks for programs.
AC_PROG_CC([clang gcc cc])