diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_PORT_CREATE.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_PORT_CREATE.h
new file mode 100644
index 0000000..69ac242
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_PORT_CREATE.h
@@ -0,0 +1,14 @@
+// HAVE_PORT_CREATE : BUILD2_AUTOCONF_LIBC_VERSION
+
+#ifndef BUILD2_AUTOCONF_LIBC_VERSION
+#  error BUILD2_AUTOCONF_LIBC_VERSION appears to be conditionally included
+#endif
+
+#undef HAVE_PORT_CREATE
+
+/* Since Solaris version ... (?). No version details in manual.
+ */
+#if (defined(__sun) && defined(__SVR4)) || \
+    defined(__sun__)
+#  define HAVE_PORT_CREATE 1
+#endif
diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_PORT_H.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_PORT_H.h
new file mode 100644
index 0000000..1e5eb79
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_PORT_H.h
@@ -0,0 +1,14 @@
+// HAVE_PORT_H : BUILD2_AUTOCONF_LIBC_VERSION
+
+#ifndef BUILD2_AUTOCONF_LIBC_VERSION
+#  error BUILD2_AUTOCONF_LIBC_VERSION appears to be conditionally included
+#endif
+
+#undef HAVE_PORT_H
+
+/* Since Solaris version ... (?). No version details in manual.
+ */
+#if (defined(__sun) && defined(__SVR4)) || \
+    defined(__sun__)
+#  define HAVE_PORT_H 1
+#endif