diff --git a/build-aux/m4/bitcoin_find_bdb48.m4 b/build-aux/m4/bitcoin_find_bdb48.m4
index 5223163fe..f3b14461e 100644
--- a/build-aux/m4/bitcoin_find_bdb48.m4
+++ b/build-aux/m4/bitcoin_find_bdb48.m4
@@ -12,29 +12,29 @@ AC_DEFUN([BITCOIN_FIND_BDB48],[
   done
   for searchpath in $bdbdirlist ''; do
     test -n "${searchpath}" && searchpath="${searchpath}/"
-    AC_TRY_COMPILE([
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <${searchpath}db_cxx.h>
-    ],[
+    ]],[[
       #if !((DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 8) || DB_VERSION_MAJOR > 4)
         #error "failed to find bdb 4.8+"
       #endif
-    ],[
+    ]])],[
       if test "x$bdbpath" = "xX"; then
         bdbpath="${searchpath}"
       fi
     ],[
       continue
     ])
-    AC_TRY_COMPILE([
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <${searchpath}db_cxx.h>
-    ],[
+    ]],[[
       #if !(DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR == 8)
         #error "failed to find bdb 4.8"
       #endif
-    ],[
+    ]])],[
       bdb48path="${searchpath}"
       break
-    ])
+    ],[])
   done
   if test "x$bdbpath" = "xX"; then
     AC_MSG_RESULT([no])
diff --git a/build-aux/m4/bitcoin_qt.m4 b/build-aux/m4/bitcoin_qt.m4
index e141033b1..edfde4cd7 100644
--- a/build-aux/m4/bitcoin_qt.m4
+++ b/build-aux/m4/bitcoin_qt.m4
@@ -217,17 +217,17 @@ dnl Requires: INCLUDES must be populated as necessary.
 dnl Output: bitcoin_cv_qt5=yes|no
 AC_DEFUN([_BITCOIN_QT_CHECK_QT5],[
   AC_CACHE_CHECK(for Qt 5, bitcoin_cv_qt5,[
-  AC_TRY_COMPILE(
-    [#include <QtCore>],
-    [
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+    [[#include <QtCore>]],
+    [[
       #if QT_VERSION < 0x050000
       choke me
       #else
       return 0;
       #endif
-    ],
-    bitcoin_cv_qt5=yes,
-    bitcoin_cv_qt5=no)
+    ]])],
+    [bitcoin_cv_qt5=yes],
+    [bitcoin_cv_qt5=no])
 ])])
 
 dnl Internal. Check if the linked version of Qt was built as static libs.
@@ -237,15 +237,15 @@ dnl Output: bitcoin_cv_static_qt=yes|no
 dnl Output: Defines QT_STATICPLUGIN if plugins are static.
 AC_DEFUN([_BITCOIN_QT_IS_STATIC],[
   AC_CACHE_CHECK(for static Qt, bitcoin_cv_static_qt,[
-  AC_TRY_COMPILE(
-    [#include <QtCore>],
-    [
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+    [[#include <QtCore>]],
+    [[
       #if defined(QT_STATIC)
       return 0;
       #else
       choke me
       #endif
-    ],
+    ]])],
     [bitcoin_cv_static_qt=yes],
     [bitcoin_cv_static_qt=no])
   ])
@@ -263,13 +263,13 @@ AC_DEFUN([_BITCOIN_QT_CHECK_STATIC_PLUGINS],[
   AC_MSG_CHECKING(for static Qt plugins: $2)
   CHECK_STATIC_PLUGINS_TEMP_LIBS="$LIBS"
   LIBS="$2 $QT_LIBS $LIBS"
-  AC_TRY_LINK([
+  AC_LINK_IFELSE([AC_LANG_PROGRAM([[
     #define QT_STATICPLUGIN
     #include <QtPlugin>
-    $1],
-    [return 0;],
+    $1]],
+    [[return 0;]])],
     [AC_MSG_RESULT(yes); QT_LIBS="$2 $QT_LIBS"],
-    [AC_MSG_RESULT(no)]; BITCOIN_QT_FAIL(Could not resolve: $2))
+    [AC_MSG_RESULT(no); BITCOIN_QT_FAIL(Could not resolve: $2)])
   LIBS="$CHECK_STATIC_PLUGINS_TEMP_LIBS"
 ])
 
diff --git a/configure.ac b/configure.ac
index 9c7a53819..0f9e78b74 100644
--- a/configure.ac
+++ b/configure.ac
@@ -335,12 +335,12 @@ if test x$use_glibc_compat != xno; then
   #__fdelt_chk's params and return type have changed from long unsigned int to long int.
   # See which one is present here.
   AC_MSG_CHECKING(__fdelt_chk type)
-  AC_TRY_COMPILE([#ifdef _FORTIFY_SOURCE
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#ifdef _FORTIFY_SOURCE
                     #undef _FORTIFY_SOURCE
                   #endif
                   #define _FORTIFY_SOURCE 2
                   #include <sys/select.h>
-     extern "C" long unsigned int __fdelt_warn(long unsigned int);],[],
+     extern "C" long unsigned int __fdelt_warn(long unsigned int);]],[[]])],
     [ fdelt_type="long unsigned int"],
     [ fdelt_type="long int"])
   AC_MSG_RESULT($fdelt_type)
@@ -392,8 +392,8 @@ AC_CHECK_DECLS([le32toh, le64toh, htole32, htole64, be32toh, be64toh, htobe32, h
 
 dnl Check for MSG_NOSIGNAL
 AC_MSG_CHECKING(for MSG_NOSIGNAL)
-AC_TRY_COMPILE([#include <sys/socket.h>],
- [ int f = MSG_NOSIGNAL; ],
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]],
+ [[ int f = MSG_NOSIGNAL; ]])],
  [ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_MSG_NOSIGNAL, 1,[Define this symbol if you have MSG_NOSIGNAL]) ],
  [ AC_MSG_RESULT(no)]
 )
@@ -535,16 +535,16 @@ TEMP_LIBS="$LIBS"
 LIBS="$BOOST_LIBS $BOOST_CHRONO_LIB $LIBS"
 TEMP_CPPFLAGS="$CPPFLAGS"
 CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
-AC_TRY_LINK([
+AC_LINK_IFELSE([AC_LANG_PROGRAM([[
   #include <boost/thread/thread.hpp>
   #include <boost/version.hpp>
-  ],[
+  ]],[[
   #if BOOST_VERSION >= 105000 && (!defined(BOOST_HAS_NANOSLEEP) || BOOST_VERSION >= 105200)
       boost::this_thread::sleep_for(boost::chrono::milliseconds(0));
   #else
    choke me
   #endif
-  ],
+  ]])],
   [boost_sleep=yes; BOOST_LIBS="$BOOST_LIBS $BOOST_CHRONO_LIB";
      AC_DEFINE(HAVE_WORKING_BOOST_SLEEP_FOR, 1, [Define this symbol if boost sleep_for works])],
   [boost_sleep=no])
@@ -557,17 +557,17 @@ TEMP_LIBS="$LIBS"
 LIBS="$BOOST_LIBS $LIBS"
 TEMP_CPPFLAGS="$CPPFLAGS"
 CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
-AC_TRY_LINK([
+AC_LINK_IFELSE([AC_LANG_PROGRAM([[
   #include <boost/version.hpp>
   #include <boost/thread.hpp>
   #include <boost/date_time/posix_time/posix_time_types.hpp>
-  ],[
+  ]],[[
   #if BOOST_VERSION <= 105600
       boost::this_thread::sleep(boost::posix_time::milliseconds(0));
   #else
    choke me
   #endif
-  ],
+  ]])],
   [boost_sleep=yes; AC_DEFINE(HAVE_WORKING_BOOST_SLEEP, 1, [Define this symbol if boost sleep works])],
   [boost_sleep=no])
 LIBS="$TEMP_LIBS"