--- libbpg-0.9.7/Makefile
+++ libbpg-0.9.7/Makefile
@@ -61,7 +61,7 @@
 LDFLAGS+=-Wl,--gc-sections
 endif
 CFLAGS+=-g
-CXXFLAGS=$(CFLAGS)
+CXXFLAGS=$(CFLAGS) -std=gnu++98
 
 PROGS=bpgdec$(EXE) bpgenc$(EXE)
 ifdef USE_BPGVIEW