[PATCH v2] unit-tests/logging.logger: Fix tests with Guile 2

[Artyom V. Poptsov]

When tests are run with Guile 2 "logging.logger.scm" would always fail
due to undefined reference to "mkstemp" that was introduced only in
Guile 3.  In Guile 2 the procedure is called "mkstemp!".  Also
"call-with-port" procedure is available only from (rnrs io ports) in
Guile 2, while in Guile 3 this procedure is available out of box.
This patch fixes these issues by adding an additional runtime check.

* unit-tests/logging.logger.scm (call-with-temporary-file): Bugfix:
  Check Guile major version and use "mkstemp!" when Guile 2 is used;
  use "mkstemp" otherwise.  Also for Guile 2 load "call-with-port"
  from (rnrs io ports).
---
 unit-tests/logging.logger.scm | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/unit-tests/logging.logger.scm b/unit-tests/logging.logger.scm
index c69a86d..fbf4ce7 100644
--- a/unit-tests/logging.logger.scm
+++ b/unit-tests/logging.logger.scm
@@ -3,6 +3,7 @@
 ;;;    Copyright (C) 2003 Richard Todd
 ;;;    Copyright (C) 2024 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;;    Copyright (C) 2024 David Pirotte <david@altosw.be>
+;;;    Copyright (C) 2024 Artyom V. Poptsov <poptsov.artyom@gmail.com>
 
 ;;;    This program is free software; you can redistribute it and/or modify
 ;;;    it under the terms of the GNU General Public License as published by
@@ -28,8 +29,12 @@
 (define* (call-with-temporary-file proc #:key (mode "w+"))
   "Open a temporary file name and pass it to PROC, a procedure of one
 argument.  The port is automatically closed."
-  (let ((port (mkstemp "/tmp/file-XXXXXX" mode)))
-    (call-with-port port proc)))
+  (let ((file-name "/tmp/file-XXXXXX"))
+    (if (< (string->number (major-version)) 3)
+        (let ((port (mkstemp! (string-copy file-name) mode)))
+          ((@ (rnrs io ports) call-with-port) port proc))
+        (let ((port (mkstemp file-name mode)))
+          (call-with-port port proc)))))
 
 (define-class <test-logging> (<test-case>))
 

base-commit: 0e2b6b0ae5cc43c98075386bb4c69defb705f3b3
-- 
2.41.0