diff --git a/Makefile.in b/Makefile.in
index 09cde0262..e3768580c 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -92,6 +92,7 @@ datarootdir = @datarootdir@
 CFG_WITH_CCWARN = @CFG_WITH_CCWARN@
 CFG_WITH_DEFENV = @CFG_WITH_DEFENV@
 CFG_WITH_LONGTESTS = @CFG_WITH_LONGTESTS@
+CFG_WITH_THREADED = @CFG_WITH_THREADED@
 PACKAGE_VERSION = @PACKAGE_VERSION@
 
 #### End of system configuration section. ####
@@ -505,6 +506,9 @@ dist-file-list:
 	@echo $(wildcard $(DISTFILES))
 	@echo "end-dist-file-list:";  # Scripts look for this
 
+print-cfg-with-threaded:
+	@echo $(CFG_WITH_THREADED)
+
 ######################################################################
 # Distributions
 
diff --git a/configure.ac b/configure.ac
index e5dfc5327..678f5b774 100644
--- a/configure.ac
+++ b/configure.ac
@@ -227,6 +227,23 @@ _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_NO_UNUSED,-Wno-unused-variable)
 _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_NO_UNUSED,-Wno-shadow)
 AC_SUBST(CFG_CXXFLAGS_NO_UNUSED)
 
+# Set CFG_WITH_THREADED if can support threading
+AC_MSG_CHECKING(whether $CXX supports Verilated threads)
+ACO_SAVE_CXXFLAGS="$CXXFLAGS"
+CXXFLAGS="$CXXFLAGS $CFG_CXXFLAGS_STD_NEWEST $CFG_CXXFLAGS_NO_UNUSED"
+AC_LINK_IFELSE(
+     [AC_LANG_PROGRAM([#include <thread>], [[ ]])],
+     [_my_result=yes
+      if test -s conftest.err; then
+        if grep -e "$1" conftest.err >/dev/null; then
+          _my_result=no
+        fi
+      fi],
+     [_my_result=no])
+CFG_WITH_THREADED=$_my_result
+AC_SUBST(CFG_WITH_THREADED)
+AC_MSG_RESULT($CFG_WITH_THREADED)
+
 # Checks for library functions.
 AC_CHECK_MEMBER([struct stat.st_mtim.tv_nsec],
     [AC_DEFINE([HAVE_STAT_NSEC],[1],[Defined if struct stat has st_mtim.tv_nsec])],
diff --git a/test_regress/driver.pl b/test_regress/driver.pl
index 820838d63..26df45d45 100755
--- a/test_regress/driver.pl
+++ b/test_regress/driver.pl
@@ -1512,6 +1512,12 @@ sub cxx_version {
     return $_Cxx_Version;
 }
 
+our $_Cfg_With_Threaded;
+sub cfg_with_threaded {
+    my $out = `make -f ../Makefile print-cfg-with-threaded`;
+    return ($out =~ /yes/i) ? 1:0;
+}
+
 sub file_grep_not {
     my $self = (ref $_[0]? shift : $Self);
     my $filename = shift;
diff --git a/test_regress/t/t_threads_counter_1.pl b/test_regress/t/t_threads_counter_1.pl
index 8cf80808b..186cc575e 100755
--- a/test_regress/t/t_threads_counter_1.pl
+++ b/test_regress/t/t_threads_counter_1.pl
@@ -7,6 +7,8 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
 
+$Self->skip("No thread support") if !$Self->cfg_with_threaded;
+
 top_filename("t/t_threads_counter.v");
 
 compile (
diff --git a/test_regress/t/t_threads_counter_2.pl b/test_regress/t/t_threads_counter_2.pl
index c1519604c..3a7c975fb 100755
--- a/test_regress/t/t_threads_counter_2.pl
+++ b/test_regress/t/t_threads_counter_2.pl
@@ -7,6 +7,8 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
 
+$Self->skip("No thread support") if !$Self->cfg_with_threaded;
+
 top_filename("t/t_threads_counter.v");
 
 compile (
diff --git a/test_regress/t/t_verilated_all_newest.pl b/test_regress/t/t_verilated_all_newest.pl
index 183c15808..7bb138b9a 100755
--- a/test_regress/t/t_verilated_all_newest.pl
+++ b/test_regress/t/t_verilated_all_newest.pl
@@ -13,7 +13,7 @@ my $root = "..";
 
 compile (
     # Can't use --coverage and --savable together, so cheat and compile inline
-    verilator_flags2 => ['--cc --coverage-toggle --coverage-line --coverage-user --trace --threads 1 --vpi $root/include/verilated_save.cpp'],
+    verilator_flags2 => ['--cc --coverage-toggle --coverage-line --coverage-user --trace --vpi $root/include/verilated_save.cpp'],
     );
 
 execute (
diff --git a/test_regress/t/t_verilated_threaded.pl b/test_regress/t/t_verilated_threaded.pl
new file mode 100755
index 000000000..c6585d885
--- /dev/null
+++ b/test_regress/t/t_verilated_threaded.pl
@@ -0,0 +1,26 @@
+#!/usr/bin/perl
+if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); die; }
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2003-2009 by Wilson Snyder. This program is free software; you can
+# redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+
+$Self->skip("No thread support") if !$Self->cfg_with_threaded;
+
+top_filename("t/t_verilated_all.v");
+
+my $root = "..";
+
+compile (
+    # Can't use --coverage and --savable together, so cheat and compile inline
+    verilator_flags2 => ['--cc --coverage-toggle --coverage-line --coverage-user --trace --threads 1 --vpi $root/include/verilated_save.cpp'],
+    );
+
+execute (
+    check_finished=>1,
+    );
+
+ok(1);
+1;
diff --git a/test_regress/t/t_vpi_get.pl b/test_regress/t/t_vpi_get.pl
index 3de835d11..195facc86 100755
--- a/test_regress/t/t_vpi_get.pl
+++ b/test_regress/t/t_vpi_get.pl
@@ -7,6 +7,9 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
 
+$Self->skip("Known compiler limitation")
+    if $Self->cxx_version =~ /\(GCC\) 4.4/;
+
 compile (
     make_top_shell => 0,
     make_main => 0,
diff --git a/test_regress/t/t_vpi_memory.pl b/test_regress/t/t_vpi_memory.pl
index d071f4c98..6042b3b7d 100755
--- a/test_regress/t/t_vpi_memory.pl
+++ b/test_regress/t/t_vpi_memory.pl
@@ -7,6 +7,9 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
 
+$Self->skip("Known compiler limitation")
+    if $Self->cxx_version =~ /\(GCC\) 4.4/;
+
 compile (
     make_top_shell => 0,
     make_main => 0,