1 files changed, 9 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 6bc26a8..31af4e2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,19 @@
 CXX=clang++-11
 #CXX=g++-10
 
+STANDARD=c++17
+#STANDARD=c++20
+
 CXXFLAGS=-O0 -g -D_DEBUG
 #CXXFLAGS=-O2 -DNDEBUG
 
-CXXFLAGS+=-Wall -Iinclude -std=c++20
+CXXFLAGS+=-Wall -Iinclude -std=$(STANDARD)
 
 ifeq ($(CXX),clang++-11)
+COMPILER_SUITE=clang
+endif
+
+ifeq ($(COMPILER_SUITE),clang)
 CXXFLAGS+=-stdlib=libc++
 endif
 
@@ -16,7 +23,7 @@ LDLIBS+=\
 -lboost_timer \
 -lboost_system \
 
-ifeq ($(CXX),clang++-11)
+ifeq ($(COMPILER_SUITE),clang)
 LIBS+= \
 -fuse-ld=lld-11 \
 -lc++ \