SPDX-License-Identifier: GPL-3.0-or-later

Make Guile module initialization work in both static and shared builds without
relying on GNUTLS_GUILE_CROSS_COMPILING. Prefer symbols linked into the main
program (static profile), and fall back to load-extension when they are not
available.

--- guile-gnutls-v5.0.1/guile/modules/gnutls.in
+++ guile-gnutls-v5.0.1/guile/modules/gnutls.in
@@ -817,11 +817,18 @@
         ;; save 'extensiondir' only if it's different from what Guile expects.
         @maybe_guileextensiondir@))
 
-  (unless (getenv "GNUTLS_GUILE_CROSS_COMPILING")
-    (load-extension (if %libdir
-                        (string-append %libdir "/guile-gnutls-v-2")
-                        "guile-gnutls-v-2")
-                    "scm_init_gnutls")))
+  ;; Static profile: bindings are linked into the main program.
+  ;; Shared profile: fall back to loading the extension.
+  (let* ((self-handle (false-if-exception (dynamic-link #f)))
+         (loaded-in-place?
+          (and self-handle
+               (false-if-exception
+                (dynamic-call "scm_init_gnutls" self-handle)))))
+    (unless loaded-in-place?
+      (load-extension (if %libdir
+                          (string-append %libdir "/guile-gnutls-v-2")
+                          "guile-gnutls-v-2")
+                      "scm_init_gnutls"))))
 
 (define-syntax define-deprecated
   (lambda (s)
@@ -866,7 +873,8 @@
 (define certificate-verify/allow-any-x509-v1-ca-certificate #f)
 (define certificate-verify/allow-x509-v1-ca-certificate #f)
 
-(unless (getenv "GNUTLS_GUILE_CROSS_COMPILING")
+(when (module-variable (current-module) 'protocol/ssl3)
+
   ;; Renaming.
   (set! protocol/ssl-3 protocol/ssl3)
   (set! protocol/tls-1.0 protocol/tls1-0)