From 80804e10c8165a52f36495cbe7bded41811ad52e Mon Sep 17 00:00:00 2001
From: Simon Tournier <zimon.toutoune@gmail.com>
Date: Tue, 28 Oct 2025 17:49:39 +0100
Subject: [PATCH] gnu: r-rstan: Adjust GCC@14.

* gnu/packages/bioconductor.scm (r-rstan)[arguments]: Add phase that decreases
GCC@14 strictness.

Change-Id: I83920c1acfd944f36625385012f0dd28bbc3decc
---
 gnu/packages/cran.scm | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/cran.scm b/gnu/packages/cran.scm
index 345cf3a627972fb0502d9e2010f1b910e7665ad5..43d64f1242e7b03d71d07370470b58526e7a9169 100644
--- a/gnu/packages/cran.scm
+++ b/gnu/packages/cran.scm
@@ -45549,7 +45549,13 @@ techniques to average Bayesian predictive distributions.")
              (setenv "TZ" "UTC+1")
              (setenv "TZDIR"
                      (search-input-directory inputs
-                                             "share/zoneinfo")))))))
+                                             "share/zoneinfo"))))
+         (add-before 'install 'relax-gcc-14-strictness
+            (lambda _
+              (substitute* "src/Makevars"
+                (("CXX_STD = CXX17")
+                 "CXX_STD = CXX17
+PKG_CXXFLAGS+=-g -O2 -Wno-error=changes-meaning")))))))
     (native-inputs
      (list r-knitr
            r-matrix