sm: Init nPth which might be used by some helper code.

* sm/gpgsm.c: Include npth.h.
(main): Init nPth.
--

Actually we currently do not use extra threads but we need to link to
the npth version of the common functions because there is an option to
use threads.  Now, without initialized npth, we could experience a
crash in gnupg_sleep, which uses npth_usleep in the npth based common
functions.

Fixes-commit: 046f419f806036248c058c4bd44368f8596287b7

sm/gpgsm.c

@@ -29,6 +29,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 /*#include <mcheck.h>*/
+#include <npth.h>
 
 #define INCLUDED_BY_MAIN_MODULE 1
 
@@ -568,6 +569,10 @@ our_md_test_algo (int algo)
 }
 
 
+/* nPth wrapper function definitions. */
+ASSUAN_SYSTEM_NPTH_IMPL;
+
+
 static char *
 make_libversion (const char *libname, const char *(*getfnc)(const char*))
 {
@@ -1624,18 +1629,22 @@ main ( int argc, char **argv)
                   gpgrt_strusage(11), gpgrt_strusage(13), gpgrt_strusage(14) );
       es_fprintf (es_stderr, "%s\n", gpgrt_strusage(15) );
     }
-#  ifdef IS_DEVELOPMENT_VERSION
+#ifdef IS_DEVELOPMENT_VERSION
   if (!opt.batch)
     {
       log_info ("NOTE: THIS IS A DEVELOPMENT VERSION!\n");
       log_info ("It is only intended for test purposes and should NOT be\n");
       log_info ("used in a production environment or with production keys!\n");
     }
-#  endif
+#endif
 
   if (may_coredump && !opt.quiet)
     log_info (_("WARNING: program may create a core file!\n"));
 
+  npth_init ();
+  assuan_set_system_hooks (ASSUAN_SYSTEM_NPTH);
+  gpgrt_set_syscall_clamp (npth_unprotect, npth_protect);
+
 /*   if (opt.qualsig_approval && !opt.quiet) */
 /*     log_info (_("This software has officially been approved to " */
 /*                 "create and verify\n" */