From 27b029ba674ddc0ea3d54dba9336ec8f2641390d Mon Sep 17 00:00:00 2001
From: Martchus <martchus@gmx.net>
Date: Fri, 23 Dec 2022 20:54:54 +0100
Subject: [PATCH] =?UTF-8?q?Avoid=20invalid=20`-std=3Dc++=E2=80=A6`=20flag?=
 =?UTF-8?q?=20when=20`CXX=5FSTANDARD`=20is=20empty=20in=20CMake=20macro?=
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---
 lib/cmake/modules/ReflectionGenerator.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/cmake/modules/ReflectionGenerator.cmake b/lib/cmake/modules/ReflectionGenerator.cmake
index 119f2b5..b80497b 100644
--- a/lib/cmake/modules/ReflectionGenerator.cmake
+++ b/lib/cmake/modules/ReflectionGenerator.cmake
@@ -141,7 +141,7 @@ function (add_reflection_generator_invocation)
     if (ARGS_CLANG_OPTIONS_FROM_TARGETS)
         foreach (TARGET_NAME ${ARGS_CLANG_OPTIONS_FROM_TARGETS})
             # set c++ standard
-            list(APPEND ARGS_CLANG_OPTIONS "-std=c++$<TARGET_PROPERTY:${TARGET_NAME},CXX_STANDARD>")
+            list(APPEND ARGS_CLANG_OPTIONS "$<$<BOOL:$<TARGET_PROPERTY:${TARGET_NAME},CXX_STANDARD>>:-std=c++$<TARGET_PROPERTY:${TARGET_NAME},CXX_STANDARD>>")
             # add compile flags and options
             _reflective_rapidjson_set_prop("${TARGET_NAME}" COMPILE_FLAGS)
             list(APPEND ARGS_CLANG_OPTIONS "$<$<BOOL:${PROP}>:$<JOIN:${PROP},$<SEMICOLON>>>")