buildroot/package/json-for-modern-cpp/0001-buildsystem-relax-requirement-on-cmake-version.patch

From e8b6b7adc138a66f8d47396a2e707366d3771028 Mon Sep 17 00:00:00 2001
From: "Yann E. MORIN" <yann.morin.1998@free.fr>
Date: Mon, 31 Dec 2018 18:42:09 +0100
Subject: [PATCH] buildsystem: relax requirement on cmake version

Commit 73cc5089 (Using target_compile_features to specify C++ 11
standard) bumped the required cmake version, from 3.0 to 3.8, so
as to get the definition of target_compile_features().

However, target_compile_features() was introduced in cmake-3.1:
    https://cmake.org/cmake/help/v3.1/command/target_compile_features.html

And using cmake-3.1 is indeed sufficient to properly build.

As such, relax the minimum required version down to cmake-3.1,
so we can build on oldish, entreprise-grade distributions that
only have cmake-3.1 (or at least, don't have up to cmake-3.8).

Reported-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

---
Upstream status: MR pending
https://github.com/nlohmann/json/pull/1409
---
 CMakeLists.txt                                     | 2 +-
 benchmarks/CMakeLists.txt                          | 2 +-
 test/cmake_add_subdirectory/project/CMakeLists.txt | 2 +-
 test/cmake_import/project/CMakeLists.txt           | 2 +-
 test/cmake_import_minver/project/CMakeLists.txt    | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 409f5bff..da6f08e7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.1)
 
 ##
 ## PROJECT
diff --git a/benchmarks/CMakeLists.txt b/benchmarks/CMakeLists.txt
index a53812c1..dd3f3027 100644
--- a/benchmarks/CMakeLists.txt
+++ b/benchmarks/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.1)
 project(JSON_Benchmarks LANGUAGES CXX)
 
 # set compiler flags
diff --git a/test/cmake_add_subdirectory/project/CMakeLists.txt b/test/cmake_add_subdirectory/project/CMakeLists.txt
index 2c5be183..21357b68 100644
--- a/test/cmake_add_subdirectory/project/CMakeLists.txt
+++ b/test/cmake_add_subdirectory/project/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.1)
 
 project(DummyImport CXX)
 
diff --git a/test/cmake_import/project/CMakeLists.txt b/test/cmake_import/project/CMakeLists.txt
index d268d72c..fe892fc1 100644
--- a/test/cmake_import/project/CMakeLists.txt
+++ b/test/cmake_import/project/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.1)
 
 project(DummyImport CXX)
 
diff --git a/test/cmake_import_minver/project/CMakeLists.txt b/test/cmake_import_minver/project/CMakeLists.txt
index eeef3296..29056bdc 100644
--- a/test/cmake_import_minver/project/CMakeLists.txt
+++ b/test/cmake_import_minver/project/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.1)
 
 project(DummyImportMinVer CXX)
 
-- 
2.14.1