From 8d7c6d45914c7355e1a2405a9781dabf63383cdb Mon Sep 17 00:00:00 2001
From: Hugo Buddelmeijer <hugo@buddelmeijer.nl>
Date: Thu, 14 Aug 2025 12:44:45 +0200
Subject: [PATCH] gnu: cfitsio: Enable reentrant multithreading.
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To build ESO’s Common Pipeline Library (CPL), CFITSIO has to be compiled
with enabled reentrant multithreading configure flag.

See: <https://www.eso.org/sci/software/cpl/download.html>

* gnu/packages/astronomy.scm (cfitsio)[arguments]<#:configure-flags>:
  Add "--enable-reentrant".

Change-Id: I75f36af8a9dc86becf4c7c764ade6f8e53f5a279
Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>
---
 gnu/packages/astronomy.scm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/astronomy.scm b/gnu/packages/astronomy.scm
index 7085fde1cf8e2aa3cdfb3791b08f1de3d80d9b90..b4af8b55ac357665bbf03f89d98044fc25bacb9a 100644
--- a/gnu/packages/astronomy.scm
+++ b/gnu/packages/astronomy.scm
@@ -17,6 +17,7 @@
 ;;; Copyright © 2024-2025 Artyom V. Poptsov <poptsov.artyom@gmail.com>
 ;;; Copyright © 2025 Vasilii Smirnov <vasilii.smirnov@mailbox.org>
 ;;; Copyright © 2025 Daniel Ziltener <dziltener@lyrion.ch>
+;;; Copyright © 2025 Hugo Buddelmeijer <hugo@buddelmeijer.nl>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -631,7 +632,8 @@ accurately in real time at any rate desired.")
     (arguments
      (list
       #:configure-flags
-      #~(list (string-append "--with-bzip2=" #$(this-package-input "bzip2")))
+      #~(list "--enable-reentrant"
+              (string-append "--with-bzip2=" #$(this-package-input "bzip2")))
       #:phases
       #~(modify-phases %standard-phases
           (add-after 'unpack 'patch-paths