1 files changed, 5 insertions, 4 deletions
diff --git a/config.mk b/config.mk
index 87c766f..ed0a879 100644
--- a/config.mk
+++ b/config.mk
@@ -12,12 +12,13 @@ INCS =
 LIBS = -lc
 
 # debug
-#CFLAGS = -fstack-protector-all -O0 -g -std=c99 -Wall -Wextra -pedantic -DVERSION=\"${VERSION}\" -D_POSIX_C_SOURCE=200809L
-#LDFLAGS = ${LIBS}
+CFLAGS = -fstack-protector-all -O0 -g -std=c99 -Wall -Wextra -pedantic \
+	-DVERSION=\"${VERSION}\" -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE
+LDFLAGS = ${LIBS}
 
 # optimized
-CFLAGS = -O2 -std=c99 -DVERSION=\"${VERSION}\" -D_POSIX_C_SOURCE=200809L
-LDFLAGS = -s ${LIBS}
+#CFLAGS = -O2 -std=c99 -DVERSION=\"${VERSION}\" -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE
+#LDFLAGS = -s ${LIBS}
 
 # Solaris
 #CFLAGS = -fast ${INCS} -DVERSION=\"${VERSION}\"