cmake: detect Cygwin which needs extensions to build

f8925343 · Matthias Grob · 67265e07 · f8925343
Commit f8925343 authored Feb 04, 2019 by Matthias Grob
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CMakeLists.txt CMakeLists.txt +3 -1

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--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,9 @@ if (CMAKE_VERSION VERSION_LESS "3.1")
 else()
  set(CMAKE_CXX_STANDARD 11)
  set(CMAKE_CXX_STANDARD_REQUIRED ON)
-  set(CMAKE_CXX_EXTENSIONS OFF)
+  if(NOT CYGWIN)
+    set(CMAKE_CXX_EXTENSIONS OFF)
+  endif()
 endif()

 if (POLICY CMP0048)