From a6bb734f49ab221add4314946127af0832e63dbc Mon Sep 17 00:00:00 2001
From: Andrey Astafyev <dev@246060.ru>
Date: Mon, 18 May 2020 19:33:26 +0300
Subject: [PATCH] =?UTF-8?q?=D0=9F=D1=80=D0=B0=D0=B2=D0=BA=D0=B0=20=D0=B4?=
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---
 CMLibCompilerFeaturesHPPGenerate.cmake | 44 ++++++++++++++------------
 1 file changed, 23 insertions(+), 21 deletions(-)

diff --git a/CMLibCompilerFeaturesHPPGenerate.cmake b/CMLibCompilerFeaturesHPPGenerate.cmake
index 462cb4a..175e35f 100644
--- a/CMLibCompilerFeaturesHPPGenerate.cmake
+++ b/CMLibCompilerFeaturesHPPGenerate.cmake
@@ -1,23 +1,25 @@
-include(WriteCompilerDetectionHeader)
+if(${CMAKE_VERSION} VERSION_GREATER "3.6.0")
+  include(WriteCompilerDetectionHeader)
 
-set(OUTPUT_FILE ${CMAKE_BINARY_DIR}/include/compiler_features.hpp)
-if(CMLIB_GENERATED_HEADERS_PATH)
-  set(OUTPUT_FILE ${CMLIB_GENERATED_HEADERS_PATH}/compiler_features.hpp)
+  set(OUTPUT_FILE ${CMAKE_BINARY_DIR}/include/compiler_features.hpp)
+  if(CMLIB_GENERATED_HEADERS_PATH)
+    set(OUTPUT_FILE ${CMLIB_GENERATED_HEADERS_PATH}/compiler_features.hpp)
+  endif()
+
+  write_compiler_detection_header(
+    FILE ${OUTPUT_FILE}
+    PREFIX ${CMLIB_PROJECT_NAME_CANONICAL}
+    COMPILERS GNU Clang MSVC Intel
+    FEATURES
+      cxx_nullptr
+      cxx_override
+      cxx_alignas
+      cxx_alignof
+      cxx_attributes
+      cxx_auto_type
+      cxx_constexpr
+      cxx_digit_separators
+      cxx_range_for)
+
+  unset(OUTPUT_FILE)
 endif()
-
-write_compiler_detection_header(
-  FILE ${OUTPUT_FILE}
-  PREFIX ${CMLIB_PROJECT_NAME_CANONICAL}
-  COMPILERS GNU Clang MSVC Intel
-  FEATURES
-    cxx_nullptr
-    cxx_override
-    cxx_alignas
-    cxx_alignof
-    cxx_attributes
-    cxx_auto_type
-    cxx_constexpr
-    cxx_digit_separators
-    cxx_range_for)
-
-unset(OUTPUT_FILE)