--- src/Makevars.in	2020-07-02 05:32:52.000000000 +0800
+++ src/Makevars.in	2023-12-29 12:01:22.000000000 +0800
@@ -4,10 +4,7 @@
 #  JAGS_MAJOR_FORCED environmental variable. This should not be necessary on unix.
 ####################################################################################################
 
-PKG_CPPFLAGS = -I"@JAGS_INCLUDE@" -D JAGS_MAJOR_FORCED=0$(JAGS_MAJOR_VERSION) -D JAGS_MAJOR_ASSUMED=0
+PKG_CPPFLAGS = -I"@JAGS_INCLUDE@" -D JAGS_MAJOR_FORCED=0$(JAGS_MAJOR_VERSION) -D JAGS_MAJOR_ASSUMED=0 -D _GLIBCXX_USE_CXX11_ABI=0
 PKG_LIBS=-L@JAGS_LIB@ -ljags -ljrmath @JAGS_RPATH@
 
 OBJECTS = functions/DPexFun.o functions/HCPexFun.o functions/HPexFun.o functions/PPexFun.o functions/QPexFun.o distributions/DPex.o init.o pexm.o
-
-
-