From eb3e6aebf62d77e276964bf52f737885bd7e9418 Mon Sep 17 00:00:00 2001
From: sewenew <sewe.code@gmail.com>
Date: Fri, 21 Sep 2018 22:31:13 +0800
Subject: [PATCH] fix CMakeLists again...

---
 CMakeLists.txt | 8 +-------
 config.h.in    | 2 ++
 2 files changed, 3 insertions(+), 7 deletions(-)
 create mode 100644 config.h.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1b74b00e..86c6c73d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,17 +39,11 @@ try_compile(HAVE_STRING_VIEW
             "${CMAKE_CURRENT_BINARY_DIR}/try_compile"
             "${CMAKE_CURRENT_SOURCE_DIR}/try_compile/try_string_view.cpp")
 
-if (HAVE_STRING_VIEW)
-    add_definitions(-DHAVE_STRING_VIEW)
-endif()
-
 try_compile(HAVE_OPTIONAL
             "${CMAKE_CURRENT_BINARY_DIR}/try_compile"
             "${CMAKE_CURRENT_SOURCE_DIR}/try_compile/try_optional.cpp")
 
-if (HAVE_OPTIONAL)
-    add_definitions(-DHAVE_OPTIONAL)
-endif()
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.h.in ${PROJECT_SOURCE_DIR}/config.h)
 
 add_subdirectory(test)
 
diff --git a/config.h.in b/config.h.in
new file mode 100644
index 00000000..f7a80c9e
--- /dev/null
+++ b/config.h.in
@@ -0,0 +1,2 @@
+#cmakedefine HAVE_STRING_VIEW
+#cmakedefine HAVE_OPTIONAL