File use_c17.patch of Package casacore

From c42188c3969e53e92765d14dab21da76c45d9a09 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Offringa?= <offringa@astron.nl>
Date: Wed, 11 Jun 2025 17:20:24 +0200
Subject: [PATCH] Require use of C17 to avoid C23 errors from gcc 15

---
 mirlib/CMakeLists.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mirlib/CMakeLists.txt b/mirlib/CMakeLists.txt
index 0703a5d1d23..b8b6aac650c 100644
--- a/mirlib/CMakeLists.txt
+++ b/mirlib/CMakeLists.txt
@@ -2,6 +2,11 @@
 # CASA Mirlib
 #
 
+# Part of the c files is not compiling yet in C23 mode, so require
+# 17.
+set(CMAKE_C_STANDARD 17)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+
 add_library (
 casa_mirlib
 bug.c