From 9fab88eb4eea05b29d006544f3cda7b8d0cae574 Mon Sep 17 00:00:00 2001
From: Nyall Dawson <nyall.dawson@gmail.com>
Date: Wed, 29 Jan 2025 11:00:08 +1000
Subject: [PATCH] Require PROJ >= 8.2

---
 CMakeLists.txt | 4 ++++
 INSTALL.md     | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e283e40d65c..9b50255bd55 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -435,6 +435,10 @@ if(WITH_CORE)
   # required
   find_package(Proj REQUIRED)
   message(STATUS "Found Proj: ${PROJ_VERSION} ${PROJ_DIR}")
+  if(PROJ_VERSION_MAJOR LESS 8 OR (PROJ_VERSION_MAJOR EQUAL 8 AND (PROJ_VERSION_MINOR LESS 2)))
+    message(FATAL_ERROR "Cannot build QGIS using Proj older than 8.2")
+  endif(PROJ_VERSION_MAJOR LESS 8 OR (PROJ_VERSION_MAJOR EQUAL 8 AND (PROJ_VERSION_MINOR LESS 2)))
+
   find_package(GEOS REQUIRED)
   message(STATUS "Found Geos: ${GEOS_VERSION} ${GEOS_DIR}")
   find_package(GDAL REQUIRED)
diff --git a/INSTALL.md b/INSTALL.md
index cb724361d31..b710e4feba0 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -106,7 +106,7 @@ Required build tools:
 Required build dependencies:
 
 * Qt >= 5.15.2
-* Proj >= 7.2.0
+* Proj >= 8.2.0
 * GEOS >= 3.9
 * Sqlite3 >= 3.0.0
 * SpatiaLite >= 4.2.0