Index: src/Makefile.am
===================================================================
--- src/Makefile.am	(revision 850aff17345d3e7433f854ef3f1b65369f8016d8)
+++ src/Makefile.am	(revision 271a5d3f2973ea004bdf84109ba973738c2bae8a)
@@ -71,5 +71,5 @@
 EXTRA_DIST = include/cassert include/optional BasicTypes-gen.cc
 
-AM_CXXFLAGS = @HOST_FLAGS@ -Wno-deprecated -Wall -Wextra -Werror=return-type -DDEBUG_ALL -I./Parser -I$(srcdir)/Parser -I$(srcdir)/include -DYY_NO_INPUT -O3 -g -std=c++14 $(TCMALLOCFLAG)
+AM_CXXFLAGS = @HOST_FLAGS@ -Wno-deprecated -Wall -Wextra -Werror=return-type -DDEBUG_ALL -I./Parser -I$(srcdir)/Parser -I$(srcdir)/include -DYY_NO_INPUT -O3 -g -std=c++17 $(TCMALLOCFLAG)
 AM_LDFLAGS  = @HOST_FLAGS@ -Xlinker -export-dynamic
 ARFLAGS     = cr