From 4a69db787dbb669b9c8c8ffc49a9897ed26a0367 Mon Sep 17 00:00:00 2001
From: Martchus <martchus@gmx.net>
Date: Sun, 3 Jun 2018 21:49:01 +0200
Subject: [PATCH] Allow to create header for feature detection

The header will only contain some preprocessor conditions.
CMake will *not* do checks with the current compiler.
---
 cmake/modules/BasicConfig.cmake | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/cmake/modules/BasicConfig.cmake b/cmake/modules/BasicConfig.cmake
index 2d3c18b..cd87d59 100644
--- a/cmake/modules/BasicConfig.cmake
+++ b/cmake/modules/BasicConfig.cmake
@@ -119,6 +119,17 @@ endif()
 # set TARGET_EXECUTABLE which is used to refer to the target executable at its installation location
 set(TARGET_EXECUTABLE "${CMAKE_INSTALL_PREFIX}/bin/${TARGET_PREFIX}${META_PROJECT_NAME}${TARGET_SUFFIX}")
 
+# create header for feature detection
+if (META_REQUIRED_FEATURES)
+    include(WriteCompilerDetectionHeader)
+    write_compiler_detection_header(
+      FILE "${CMAKE_CURRENT_BINARY_DIR}/resources/features.h"
+      PREFIX "${META_PROJECT_VARNAME_UPPER}"
+      COMPILERS GNU Clang
+      FEATURES ${META_REQUIRED_FEATURES}
+    )
+endif()
+
 # disable new ABI (can't catch ios_base::failure with new ABI)
 option(FORCE_OLD_ABI "specifies whether usage of old ABI should be forced" OFF)
 if(FORCE_OLD_ABI)