add '--enable-debug' configure option to build with EMIT_ASN_DEBUG
... which in turn causes all the ASN_DEBUG() to be turned into
fprintf(stderr, ...) statements, once the user application decides
to set 'asn_debug = 1' somewhere in its code.
The next step would be to make _ASN_DECODE_FAILED / _ASN_ENCODE_FAILED
no longer depend on ASN_DEBUG (which it currently does)
diff --git a/src/Makefile.am b/src/Makefile.am
index 633cc04..8004b37 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -5,6 +5,9 @@
AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include/asn1c
AM_CFLAGS = -fPIC -Wall $(LIBOSMOCORE_CFLAGS)
+if BUILD_DEBUG
+AM_CFLAGS += -DEMIT_ASN_DEBUG=1
+endif
lib_LTLIBRARIES = libasn1c.la