Add check for pam_getenvlist()

config.h.in

@@ -375,6 +375,9 @@
 /* Define to 1 if you use PAM authentication. */
 #undef HAVE_PAM
 
+/* Define to 1 if you have the `pam_getenvlist' function. */
+#undef HAVE_PAM_GETENVLIST
+
 /* Define to 1 if you use a specific PAM session for sudo -i. */
 #undef HAVE_PAM_LOGIN
 

configure

@@ -18228,6 +18228,22 @@ done
     fi
 
     if test "$with_pam" = "yes"; then
+	# Older PAM implementations lack pam_getenvlist
+	OLIBS="$LIBS"
+	LIBS="$LIBS -lpam $lt_cv_dlopen_libs"
+	for ac_func in pam_getenvlist
+do :
+  ac_fn_c_check_func "$LINENO" "pam_getenvlist" "ac_cv_func_pam_getenvlist"
+if test "x$ac_cv_func_pam_getenvlist" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_PAM_GETENVLIST 1
+_ACEOF
+
+fi
+done
+
+	LIBS="$OLIBS"
+
 	# We already link with -ldl if needed (see LIBDL below)
 	SUDOERS_LIBS="${SUDOERS_LIBS} -lpam"
 	$as_echo "#define HAVE_PAM 1" >>confdefs.h

configure.in

@@ -2569,6 +2569,12 @@ if test ${with_pam-"no"} != "no"; then
     fi
 
     if test "$with_pam" = "yes"; then
+	# Older PAM implementations lack pam_getenvlist
+	OLIBS="$LIBS"
+	LIBS="$LIBS -lpam $lt_cv_dlopen_libs"
+	AC_CHECK_FUNCS(pam_getenvlist)
+	LIBS="$OLIBS"
+
 	# We already link with -ldl if needed (see LIBDL below)
 	SUDOERS_LIBS="${SUDOERS_LIBS} -lpam"
 	AC_DEFINE(HAVE_PAM)