add tests for explicit_bzero() and memset_explicit()

configure

@@ -12572,6 +12572,12 @@ if test "x$ac_cv_func_dladdr" = xyes
 then :
   printf "%s\n" "#define HAVE_DLADDR 1" >>confdefs.h
 
+fi
+ac_fn_c_check_func "$LINENO" "explicit_bzero" "ac_cv_func_explicit_bzero"
+if test "x$ac_cv_func_explicit_bzero" = xyes
+then :
+  printf "%s\n" "#define HAVE_EXPLICIT_BZERO 1" >>confdefs.h
+
 fi
 ac_fn_c_check_func "$LINENO" "fchmodat" "ac_cv_func_fchmodat"
 if test "x$ac_cv_func_fchmodat" = xyes
@@ -12698,6 +12704,12 @@ if test "x$ac_cv_func_memrchr" = xyes
 then :
   printf "%s\n" "#define HAVE_MEMRCHR 1" >>confdefs.h
 
+fi
+ac_fn_c_check_func "$LINENO" "memset_explicit" "ac_cv_func_memset_explicit"
+if test "x$ac_cv_func_memset_explicit" = xyes
+then :
+  printf "%s\n" "#define HAVE_MEMSET_EXPLICIT 1" >>confdefs.h
+
 fi
 ac_fn_c_check_func "$LINENO" "mkdirat" "ac_cv_func_mkdirat"
 if test "x$ac_cv_func_mkdirat" = xyes

configure.ac

@@ -1735,6 +1735,7 @@ AC_CHECK_FUNCS( \
   closefrom \
   ctime_r \
   dladdr \
+  explicit_bzero \
   fchmodat \
   fchownat \
   fcntl \
@@ -1756,6 +1757,7 @@ AC_CHECK_FUNCS( \
   localtime_r \
   mallopt \
   memrchr \
+  memset_explicit \
   mkdirat \
   openat \
   pthread_sigmask \

src/include/autoconf.h.in

@@ -100,6 +100,9 @@
 /* define this if we have <execinfo.h> and symbols */
 #undef HAVE_EXECINFO
 
+/* Define to 1 if you have the `explicit_bzero' function. */
+#undef HAVE_EXPLICIT_BZERO
+
 /* Define to 1 if you have the `fchmodat' function. */
 #undef HAVE_FCHMODAT
 
@@ -251,6 +254,9 @@
 /* Define to 1 if you have the `memrchr' function. */
 #undef HAVE_MEMRCHR
 
+/* Define to 1 if you have the `memset_explicit' function. */
+#undef HAVE_MEMSET_EXPLICIT
+
 /* Define to 1 if you have the <minix/config.h> header file. */
 #undef HAVE_MINIX_CONFIG_H