From cf13f52b70bbe7f05f3f9078a579bd182d8a0db3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A1szl=C3=B3=20Kupcsik?= <koopac@gmail.com>
Date: Tue, 22 Apr 2025 22:22:00 +0200
Subject: [PATCH] rPackages.PICS: fix build
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Strict R headers are now the default. This removes the legacy
definitions of ‘PI’, ‘Calloc’, ‘Realloc’ and ‘Free’: use ‘M_PI’,
‘R_Calloc’, ‘R_Realloc’ or ‘R_Free’ instead.
---
 pkgs/development/r-modules/default.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/development/r-modules/default.nix b/pkgs/development/r-modules/default.nix
index 1007345637f9..e8767debb668 100644
--- a/pkgs/development/r-modules/default.nix
+++ b/pkgs/development/r-modules/default.nix
@@ -1787,6 +1787,14 @@ let
       '';
     });
 
+    PICS = old.PICS.overrideAttrs (attrs: {
+      postPatch = ''
+        # https://developer.r-project.org/blosxom.cgi/R-devel/NEWS/2025/01/08#n2025-01-08
+        substituteInPlace "src/segment.c" \
+        --replace-fail "Calloc" "R_Calloc"
+      '';
+    });
+
     lwgeom = old.lwgeom.overrideAttrs (attrs: {
       configureFlags = [
         "--with-proj-lib=${pkgs.lib.getLib pkgs.proj}/lib"