From b2edcd67d0a6c84892fa6187e09d5e10302d2e1c Mon Sep 17 00:00:00 2001
From: Nigel Stewart <nigels@nigels.com>
Date: Sun, 7 Sep 2025 08:03:52 +1000
Subject: [PATCH 1/3] CMake 3.15 is required, 3.14 does not work

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c01ebcb9e..0a665fc5e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@
 # Official repository: https://github.com/boostorg/json
 #
 
-cmake_minimum_required(VERSION 3.8...3.16)
+cmake_minimum_required(VERSION 3.15...3.16)
 
 set(BOOST_JSON_VERSION 2)
 if(BOOST_SUPERPROJECT_VERSION)

From fc2009f4d60e7533c0040995d094b44003d57ef1 Mon Sep 17 00:00:00 2001
From: Nigel Stewart <nigels@nigels.com>
Date: Wed, 10 Sep 2025 11:21:37 +1000
Subject: [PATCH 2/3] CMake 3.14 is required (due to parser), 3.13 does not
 work

---
 CMakeLists.txt      | 2 +-
 test/CMakeLists.txt | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0a665fc5e..14d3a9564 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@
 # Official repository: https://github.com/boostorg/json
 #
 
-cmake_minimum_required(VERSION 3.15...3.16)
+cmake_minimum_required(VERSION 3.14...3.16)
 
 set(BOOST_JSON_VERSION 2)
 if(BOOST_SUPERPROJECT_VERSION)
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 68becd75a..58c50cdbe 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -61,7 +61,9 @@ target_compile_definitions(boost_json-no_exceptions PRIVATE
     BOOST_JSON_NO_LIB=1
 )
 target_compile_options(boost_json-no_exceptions PRIVATE
-    $<$<CXX_COMPILER_ID:GNU,Clang,AppleClang>:-fno-exceptions>
+    $<$<CXX_COMPILER_ID:GNU>:-fno-exceptions>
+    $<$<CXX_COMPILER_ID:Clang>:-fno-exceptions>
+    $<$<CXX_COMPILER_ID:AppleClang>:-fno-exceptions>
     $<$<CXX_COMPILER_ID:MSVC>:/wd4530>
     $<$<CXX_COMPILER_ID:MSVC>:/wd4577>
 )

From fa1223af8540e99c96a30aa7f9421d27b6613c7b Mon Sep 17 00:00:00 2001
From: Nigel Stewart <nigels@nigels.com>
Date: Thu, 11 Sep 2025 22:21:05 +1000
Subject: [PATCH 3/3] CMake 3.12 required for Python3 BoostPrettyPrinters,
 CMake 3.8 now works

---
 CMakeLists.txt | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 14d3a9564..0d7ec42ba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@
 # Official repository: https://github.com/boostorg/json
 #
 
-cmake_minimum_required(VERSION 3.14...3.16)
+cmake_minimum_required(VERSION 3.8...3.16)
 
 set(BOOST_JSON_VERSION 2)
 if(BOOST_SUPERPROJECT_VERSION)
@@ -54,16 +54,19 @@ if(BOOST_JSON_IS_ROOT)
     unset(CMAKE_FOLDER)
 endif()
 
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/pretty_printers")
-find_package(BoostPrettyPrinters QUIET)
-if(BoostPrettyPrinters_FOUND)
-    boost_pretty_printers_gdb_python_header(
-        TARGET boost_json_regenerate_printers
-        INPUT src/boost_json_gdb_printers.py
-        OUTPUT include/boost/json/detail/gdb_printers.hpp
-        HEADER_GUARD BOOST_JSON_DETAIL_GDB_PRINTERS_HPP
-        NO_DISABLE_MACRO
-        EXCLUDE_FROM_ALL)
+if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.12.0")
+    list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/pretty_printers")
+    # Note: find_package(Python3) supported in cmake-3.12 onwards
+    find_package(BoostPrettyPrinters QUIET)
+    if(BoostPrettyPrinters_FOUND)
+        boost_pretty_printers_gdb_python_header(
+            TARGET boost_json_regenerate_printers
+            INPUT src/boost_json_gdb_printers.py
+            OUTPUT include/boost/json/detail/gdb_printers.hpp
+            HEADER_GUARD BOOST_JSON_DETAIL_GDB_PRINTERS_HPP
+            NO_DISABLE_MACRO
+            EXCLUDE_FROM_ALL)
+    endif()
 endif()
 
 function(boost_json_setup_properties target)