From d516bb81caccb74a44abed908374e990d3dac9a4 Mon Sep 17 00:00:00 2001
From: JessyDL <jessy.de.lannoit@gmail.com>
Date: Sat, 20 May 2023 13:37:50 +0300
Subject: [PATCH] fixed build issue on clang

---
 extern/CMakeLists.txt | 24 ++++++------------------
 1 file changed, 6 insertions(+), 18 deletions(-)

diff --git a/extern/CMakeLists.txt b/extern/CMakeLists.txt
index 49168e7e..18243fa0 100644
--- a/extern/CMakeLists.txt
+++ b/extern/CMakeLists.txt
@@ -35,22 +35,10 @@ endif()
 set_property(TARGET strtype PROPERTY FOLDER "extern")
 
 # setup cppfront which lacks a cmake integration
-add_executable(cppfront_compiler cppfront/source/cppfront.cpp)
-set_target_properties(
-    cppfront_compiler
-    PROPERTIES
-    OUTPUT_NAME cppfront
-    EXPORT_NAME cppfront
-)
-target_compile_features(cppfront_compiler PRIVATE cxx_std_20)
-
-add_library(cppfront_interface INTERFACE)
-target_compile_features(cppfront_interface INTERFACE cxx_std_20)
-target_sources(
-    cppfront_interface
-    INTERFACE
-    FILE_SET HEADERS
-    BASE_DIRS cppfront/include
-    FILES cppfront/include/cpp2util.h
-)
+add_executable(cppfront_compiler "${CMAKE_CURRENT_SOURCE_DIR}/cppfront/source/cppfront.cpp")
+target_include_directories(cppfront_compiler PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/cppfront/source")
+set_target_properties(cppfront_compiler PROPERTIES CXX_STANDARD 20 CXX_STANDARD_REQUIRED TRUE OUTPUT_NAME cppfront EXPORT_NAME cppfront)
+
+add_library(cppfront_interface INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/cppfront/include/cpp2util.h")
+set_target_properties(cppfront_interface PROPERTIES CXX_STANDARD 20 CXX_STANDARD_REQUIRED TRUE)
 target_include_directories(cppfront_interface SYSTEM INTERFACE "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/cppfront/include>")