check if timegm is present before emulating

config.h.in

@@ -45,6 +45,9 @@
 /* Define to 1 if you have the <sys/types.h> header file. */
 #undef HAVE_SYS_TYPES_H
 
+/* Define to 1 if you have the `timegm' function. */
+#undef HAVE_TIMEGM
+
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 

configure

 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for asn1c 0.9.27.
+# Generated by GNU Autoconf 2.69 for asn1c 0.9.28.
 #
 # Report bugs to <vlm@lionet.info>.
 #
@@ -590,8 +590,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='asn1c'
 PACKAGE_TARNAME='asn1c'
-PACKAGE_VERSION='0.9.27'
-PACKAGE_STRING='asn1c 0.9.27'
+PACKAGE_VERSION='0.9.28'
+PACKAGE_STRING='asn1c 0.9.28'
 PACKAGE_BUGREPORT='vlm@lionet.info'
 PACKAGE_URL=''
 
@@ -1320,7 +1320,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures asn1c 0.9.27 to adapt to many kinds of systems.
+\`configure' configures asn1c 0.9.28 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1390,7 +1390,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of asn1c 0.9.27:";;
+     short | recursive ) echo "Configuration of asn1c 0.9.28:";;
    esac
   cat <<\_ACEOF
 
@@ -1501,7 +1501,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-asn1c configure 0.9.27
+asn1c configure 0.9.28
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1924,7 +1924,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by asn1c $as_me 0.9.27, which was
+It was created by asn1c $as_me 0.9.28, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -2739,7 +2739,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='asn1c'
- VERSION='0.9.27'
+ VERSION='0.9.28'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -13302,6 +13302,17 @@ _ACEOF
 fi
 done
 
+for ac_func in timegm
+do :
+  ac_fn_c_check_func "$LINENO" "timegm" "ac_cv_func_timegm"
+if test "x$ac_cv_func_timegm" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_TIMEGM 1
+_ACEOF
+
+fi
+done
+
 
 ac_config_files="$ac_config_files skeletons/tests/Makefile libasn1compiler/Makefile libasn1parser/Makefile libasn1print/Makefile asn1c/tests/Makefile libasn1fix/Makefile doc/docsrc/Makefile skeletons/Makefile examples/Makefile asn1c/Makefile doc/Makefile asn1c.spec Makefile"
 
@@ -13840,7 +13851,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by asn1c $as_me 0.9.27, which was
+This file was extended by asn1c $as_me 0.9.28, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -13906,7 +13917,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-asn1c config.status 0.9.27
+asn1c config.status 0.9.28
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 

configure.ac

@@ -91,6 +91,7 @@ AC_SEARCH_LIBS(getopt, iberty)
 AC_CHECK_FUNCS(strtoimax strtoll)
 AC_CHECK_FUNCS(mergesort)
 AC_CHECK_FUNCS(mkstemps)
+AC_CHECK_FUNCS(timegm)
 
 AC_OUTPUT(				\
 skeletons/tests/Makefile		\

skeletons/GeneralizedTime.c

@@ -128,6 +128,7 @@ static long GMTOFF(struct tm a){
 	tzset();							\
 } while(0); } while(0);
 
+#ifndef HAVE_TIMEGM
 #ifdef	_EMULATE_TIMEGM
 static time_t timegm(struct tm *tm) {
 	time_t tloc;
@@ -138,6 +139,7 @@ static time_t timegm(struct tm *tm) {
 	return tloc;
 }
 #endif	/* _EMULATE_TIMEGM */
+#endif
 
 
 #ifndef	__ASN_INTERNAL_TEST_MODE__

tests/125-bitstring-constraint-OK.asn1.-X

-<!-- XML DTD generated by asn1c-0.9.27 -->
+<!-- XML DTD generated by asn1c-0.9.28 -->
 
 <!-- ASN.1 module
 ModuleBitStringConstraint { iso org(3) dod(6) internet(1) private(4)