An earlier commit accidentily caused libmeshlink_la_LDFLAGS to be
overwritten later in src/Makefile.am, and this caused
-export-symbols-regex to be dropped, thereby exposing internal symbols
of the library.
libmeshlink_la_CFLAGS += -I${top_srcdir}/catta/src/compat/windows/include/
endif
-libmeshlink_la_LDFLAGS = $(PTHREAD_LIBS)
+libmeshlink_la_LDFLAGS += $(PTHREAD_LIBS)
libmeshlink_la_LIBADD = ${top_builddir}/catta/src/libcatta.la
libmeshlink_la_SOURCES += \