From 0dfb0893ca92190f1480d20a134e8d61272d173c Mon Sep 17 00:00:00 2001
From: relan <relan@users.noreply.github.com>
Date: Sat, 20 Apr 2019 21:31:37 +0300
Subject: [PATCH] Define proper feature test macros for glibc.

---
 configure.ac | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/configure.ac b/configure.ac
index 4d144be..b675be5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -31,6 +31,7 @@ AC_PROG_CC_C99
 AC_PROG_RANLIB
 AM_PROG_AR
 AC_SYS_LARGEFILE
+AC_CANONICAL_HOST
 PKG_CHECK_MODULES([UBLIO], [libublio], [
   CFLAGS="$CFLAGS $UBLIO_CFLAGS"
   LIBS="$LIBS $UBLIO_LIBS"
@@ -38,6 +39,12 @@ PKG_CHECK_MODULES([UBLIO], [libublio], [
     [Define if block devices are not supported.])
 ], [:])
 PKG_CHECK_MODULES([FUSE], [fuse])
+case "$host_os" in
+  *-gnu)
+    AC_DEFINE([_XOPEN_SOURCE], [500], [Enable pread() and pwrite().])
+    AC_DEFINE([_DEFAULT_SOURCE], [], [Enable vsyslog().])
+	;;
+esac
 AC_CONFIG_HEADERS([libexfat/config.h])
 AC_CONFIG_FILES([
 	libexfat/Makefile
-- 
2.11.0