build: Backport addition of librt check to configure.ac

A while back, a master-only change was made to check for librt which
should probably have been cherry-picked to 13 at that time.  Sometime
between then and now, part of that change did make it into 13 but it
was incomplete and non-functional.  This patch backports the rest
of the librt check and allows the link of libasteriskpj to use the
results.

Change-Id: I1424008fd8c90f389dda53162ec4a340b253a3c1

5 files changed, 140 insertions, 63 deletions

diff --git a/configure b/configure
index 3eb78652b..69f8c0eac 100755
--- a/configure
+++ b/configure
@@ -767,6 +767,10 @@ PBX_SUPPSERV
 SUPPSERV_DIR
 SUPPSERV_INCLUDE
 SUPPSERV_LIB
+PBX_RT
+RT_DIR
+RT_INCLUDE
+RT_LIB
 PBX_OPENSSL
 OPENSSL_DIR
 OPENSSL_INCLUDE
@@ -1230,7 +1234,6 @@ COMPRESS
 FIND
 PYTHON
 FLEX
-CUT
 CAT
 CMP
 BISON
@@ -1317,7 +1320,6 @@ infodir
 docdir
 oldincludedir
 includedir
-runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -1497,7 +1499,6 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
-runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@@ -1750,15 +1751,6 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
-  -runstatedir | --runstatedir | --runstatedi | --runstated \
-  | --runstate | --runstat | --runsta | --runst | --runs \
-  | --run | --ru | --r)
-    ac_prev=runstatedir ;;
-  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
-  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
-  | --run=* | --ru=* | --r=*)
-    runstatedir=$ac_optarg ;;
-
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1896,7 +1888,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir runstatedir
+		libdir localedir mandir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -2049,7 +2041,6 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
-  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -6811,47 +6802,6 @@ $as_echo "no" >&6; }
 fi
 
 
-# Extract the first word of "cut", so it can be a program name with args.
-set dummy cut; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_CUT+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  case $CUT in
-  [\\/]* | ?:[\\/]*)
-  ac_cv_path_CUT="$CUT" # Let the user override the test with a path.
-  ;;
-  *)
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_CUT="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-  test -z "$ac_cv_path_CUT" && ac_cv_path_CUT=":"
-  ;;
-esac
-fi
-CUT=$ac_cv_path_CUT
-if test -n "$CUT"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CUT" >&5
-$as_echo "$CUT" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
 # Extract the first word of "flex", so it can be a program name with args.
 set dummy flex; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
@@ -9301,7 +9251,7 @@ $as_echo "configuring" >&6; }
 		as_fn_error $? "nm is required to build bundled pjproject" "$LINENO" 5
 	fi
 	if test "${MD5}" = ":" ; then
-		as_fn_error $? "md5dum is required to build bundled pjproject" "$LINENO" 5
+		as_fn_error $? "md5sum is required to build bundled pjproject" "$LINENO" 5
 	fi
 	if test "${CAT}" = ":" ; then
 		as_fn_error $? "cat is required to build bundled pjproject" "$LINENO" 5
@@ -12338,6 +12288,18 @@ fi
 
 
 
+RT_DESCRIP="Realtime functions"
+
+RT_DIR=${rt_DIR}
+
+PBX_RT=0
+
+
+
+
+
+
+
     SUPPSERV_DESCRIP="mISDN Supplemental Services"
     SUPPSERV_OPTION="suppserv"
     PBX_SUPPSERV=0
@@ -13998,6 +13960,112 @@ if test "x$JANSSON_LIB" == "x"; then
   as_fn_error $? "*** JSON support not found (this typically means the libjansson development package is missing)" "$LINENO" 5
 fi
 
+# See if clock_gettime is in librt
+
+if test "x${PBX_RT}" != "x1" -a "${USE_RT}" != "no"; then
+   pbxlibdir=""
+   # if --with-RT=DIR has been specified, use it.
+   if test "x${RT_DIR}" != "x"; then
+      if test -d ${RT_DIR}/lib; then
+         pbxlibdir="-L${RT_DIR}/lib"
+      else
+         pbxlibdir="-L${RT_DIR}"
+      fi
+   fi
+   pbxfuncname="clock_gettime"
+   if test "x${pbxfuncname}" = "x" ; then   # empty lib, assume only headers
+      AST_RT_FOUND=yes
+   else
+      ast_ext_lib_check_save_CFLAGS="${CFLAGS}"
+      CFLAGS="${CFLAGS} "
+      as_ac_Lib=`$as_echo "ac_cv_lib_rt_${pbxfuncname}" | $as_tr_sh`
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${pbxfuncname} in -lrt" >&5
+$as_echo_n "checking for ${pbxfuncname} in -lrt... " >&6; }
+if eval \${$as_ac_Lib+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lrt ${pbxlibdir}  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char ${pbxfuncname} ();
+int
+main ()
+{
+return ${pbxfuncname} ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  eval "$as_ac_Lib=yes"
+else
+  eval "$as_ac_Lib=no"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+eval ac_res=\$$as_ac_Lib
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Lib"\" = x"yes"; then :
+  AST_RT_FOUND=yes
+else
+  AST_RT_FOUND=no
+fi
+
+      CFLAGS="${ast_ext_lib_check_save_CFLAGS}"
+   fi
+
+   # now check for the header.
+   if test "${AST_RT_FOUND}" = "yes"; then
+      RT_LIB="${pbxlibdir} -lrt "
+      # if --with-RT=DIR has been specified, use it.
+      if test "x${RT_DIR}" != "x"; then
+         RT_INCLUDE="-I${RT_DIR}/include"
+      fi
+      RT_INCLUDE="${RT_INCLUDE} "
+      if test "x" = "x" ; then	# no header, assume found
+         RT_HEADER_FOUND="1"
+      else				# check for the header
+         ast_ext_lib_check_saved_CPPFLAGS="${CPPFLAGS}"
+         CPPFLAGS="${CPPFLAGS} ${RT_INCLUDE}"
+         ac_fn_c_check_header_mongrel "$LINENO" "" "ac_cv_header_" "$ac_includes_default"
+if test "x$ac_cv_header_" = xyes; then :
+  RT_HEADER_FOUND=1
+else
+  RT_HEADER_FOUND=0
+fi
+
+
+         CPPFLAGS="${ast_ext_lib_check_saved_CPPFLAGS}"
+      fi
+      if test "x${RT_HEADER_FOUND}" = "x0" ; then
+         RT_LIB=""
+         RT_INCLUDE=""
+      else
+         if test "x${pbxfuncname}" = "x" ; then		# only checking headers -> no library
+            RT_LIB=""
+         fi
+         PBX_RT=1
+         cat >>confdefs.h <<_ACEOF
+#define HAVE_RT 1
+_ACEOF
+
+      fi
+   fi
+fi
+
+
+
 
 		if test "x${PBX_LIBXML2}" != "x1" -a "${USE_LIBXML2}" != "no"; then
 		PBX_LIBXML2=0
@@ -14551,7 +14619,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -14597,7 +14665,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -14621,7 +14689,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -14666,7 +14734,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -14690,7 +14758,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
diff --git a/configure.ac b/configure.ac
index 15ea4a169..1aedf2afa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -563,6 +563,7 @@ AST_EXT_LIB_SETUP([SQLITE3], [SQLite], [sqlite3])
 AST_EXT_LIB_SETUP([SRTP], [Secure RTP], [srtp])
 AST_EXT_LIB_SETUP_OPTIONAL([SRTP_SHUTDOWN], [SRTP Library Shutdown Function], [SRTP], [srtp])
 AST_EXT_LIB_SETUP([OPENSSL], [OpenSSL Secure Sockets Layer], [ssl])
+AST_EXT_LIB_SETUP_OPTIONAL([RT], [Realtime functions], [rt])
 AST_EXT_LIB_SETUP([SUPPSERV], [mISDN Supplemental Services], [suppserv])
 AST_EXT_LIB_SETUP([FREETDS], [FreeTDS], [tds])
 AST_EXT_LIB_SETUP([TERMCAP], [Termcap], [termcap])
@@ -634,6 +635,9 @@ if test "x$JANSSON_LIB" == "x"; then
   AC_MSG_ERROR([*** JSON support not found (this typically means the libjansson development package is missing)])
 fi
 
+# See if clock_gettime is in librt
+AST_EXT_LIB_CHECK([RT], [rt], [clock_gettime])
+
 AST_EXT_TOOL_CHECK([LIBXML2], [xml2-config], , ,
         [#include <libxml/tree.h>
         #include <libxml/parser.h>],
diff --git a/include/asterisk/autoconfig.h.in b/include/asterisk/autoconfig.h.in
index c47923be8..6d6a28bb9 100644
--- a/include/asterisk/autoconfig.h.in
+++ b/include/asterisk/autoconfig.h.in
@@ -796,6 +796,9 @@
 /* Define to 1 if you have the `roundl' function. */
 #undef HAVE_ROUNDL
 
+/* Define to 1 if rt has the Realtime functions feature. */
+#undef HAVE_RT
+
 /* Define if your system has the RTLD_NOLOAD headers. */
 #undef HAVE_RTLD_NOLOAD
 
diff --git a/main/Makefile b/main/Makefile
index df9a01cc4..37b944676 100644
--- a/main/Makefile
+++ b/main/Makefile
@@ -287,7 +287,7 @@ endif
 
 $(ASTPJ_LIB).$(ASTPJ_SO_VERSION): _ASTLDFLAGS+=-Wl,-soname=$(ASTPJ_LIB) $(PJ_LDFLAGS)
 $(ASTPJ_LIB).$(ASTPJ_SO_VERSION): _ASTCFLAGS+=-fPIC -DAST_MODULE=\"asteriskpj\" $(PJ_CFLAGS)
-$(ASTPJ_LIB).$(ASTPJ_SO_VERSION): LIBS+=$(PJPROJECT_LDLIBS) -lssl -lcrypto -luuid -lm -lpthread
+$(ASTPJ_LIB).$(ASTPJ_SO_VERSION): LIBS+=$(PJPROJECT_LDLIBS) -lssl -lcrypto -luuid -lm -lpthread $(RT_LIB)
 ifeq ($(GNU_LD),1)
     $(ASTPJ_LIB).$(ASTPJ_SO_VERSION): SO_SUPPRESS_SYMBOLS=-Wl,--version-script,libasteriskpj.exports,--warn-common
 endif
@@ -312,7 +312,7 @@ ASTPJ_LIB:=libasteriskpj.dylib
 # /lib or /usr/lib
 $(ASTPJ_LIB): _ASTLDFLAGS+=-dynamiclib -install_name $(ASTLIBDIR)/$(ASTPJ_LIB) $(PJ_LDFLAGS)
 $(ASTPJ_LIB): _ASTCFLAGS+=-fPIC -DAST_MODULE=\"asteriskpj\" $(PJ_CFLAGS)
-$(ASTPJ_LIB): LIBS+=$(PJPROJECT_LIBS)  -lssl -lcrypto -luuid -lm -lrt -lpthread
+$(ASTPJ_LIB): LIBS+=$(PJPROJECT_LIBS)  -lssl -lcrypto -luuid -lm -lpthread $(RT_LIB)
 $(ASTPJ_LIB): SOLINK=$(DYLINK)
 
 # Special rules for building a shared library (not a dynamically loadable module)
diff --git a/makeopts.in b/makeopts.in
index e5ab0be96..3f92562f4 100644
--- a/makeopts.in
+++ b/makeopts.in
@@ -258,6 +258,8 @@ PYTHONDEV_LIB=@PYTHONDEV_LIB@
 RESAMPLE_INCLUDE=@RESAMPLE_INCLUDE@
 RESAMPLE_LIB=@RESAMPLE_LIB@
 
+RT_LIB=@RT_LIB@
+
 SS7_INCLUDE=@SS7_INCLUDE@
 SS7_LIB=@SS7_LIB@