…

src/Makefile.am

@@ -0,0 +1,5 @@
+lib_LTLIBRARIES = libexim4encrypt.la
+libexim4encrypt_la_SOURCES = exim4encrypt.c exim4encrypt.h
+libexim4encrypt_la_CPPFLAGS = -I/usr/include/exim4
+libexim4encrypt_la_LDFLAGS = -shared
+include_HEADERS = sodium.h local_scan.h

src/exim4encrypt.c

@@ -0,0 +1,8 @@
+#include "exim4encrypt.h"
+
+__attribute__((constructor)) static void init() {
+    sodium_init();
+}
+
+int dlfunction(uschar **yield, int argc, uschar *argv[]) {
+}

src/exim4encrypt.h

@@ -0,0 +1,9 @@
+#include <sodium.h>
+#include <local_scan.h>
+
+#ifndef EXIM_ENCRYPT_LIBRARY_H
+#define EXIM_ENCRYPT_LIBRARY_H
+
+
+#endif //EXIM_ENCRYPT_LIBRARY_H
+