diff --git a/configure.ac b/configure.ac
index 46be93cb..cca2f51e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -126,6 +126,8 @@ AC_CHECK_FUNCS([getrlimit])
 
 dnl Checked only for reporting in version display as of now (may be used in future versions):
 AC_CHECK_FUNCS([pipe pipe2 socketpair posix_spawn posix_spawnp])
+AC_CHECK_FUNCS([posix_fadvise posix_fallocate posix_madvise])
+AC_CHECK_FUNCS([fallocate ftruncate])
 
 dnl check for crypt():
 AC_SEARCH_LIBS([crypt_r], [crypt], [
diff --git a/src/version.c b/src/version.c
index 04beb2c8..1e5faf83 100644
--- a/src/version.c
+++ b/src/version.c
@@ -88,6 +88,21 @@ const char * const * version_get_compiletime_flags(void)
 #endif
 #ifdef HAVE_POSIX_SPAWNP
         "posix_spawnp",
+#endif
+#ifdef HAVE_POSIX_FADVISE
+        "posix_fadvise",
+#endif
+#ifdef HAVE_POSIX_FALLOCATE
+        "posix_fallocate",
+#endif
+#ifdef HAVE_POSIX_MADVISE
+        "posix_madvise",
+#endif
+#ifdef HAVE_FALLOCATE
+        "fallocate",
+#endif
+#ifdef HAVE_FTRUNCATE
+        "ftruncate",
 #endif
         /* ---[ OS ]--- */
 #ifdef WIN32