Add more Travis coverage

.travis.yml

@@ -5,20 +5,94 @@
 # General Public License Version 3 or the Perl Artistic License Version 2.0.
 
 language: cpp
-compiler: gcc
+
+matrix:
+  include:
+# Non-cron build will just run on whatever linux flavor we get
+    - if: type != cron
+      os: linux
+      compiler: gcc
+      env:
+        - SCENARIOS=--dist
+    - if: type != cron
+      os: linux
+      compiler: gcc
+      env:
+        - SCENARIOS=--vlt
+    - if: type != cron
+      os: linux
+      compiler: gcc
+      env:
+        - SCENARIOS=--vltmt
+# Cron builds try different OS/compiler combinations
+    - if: type = cron
+      dist: xenial
+      compiler: gcc
+      env:
+        - SCENARIOS=--dist
+    - if: type = cron
+      dist: xenial
+      compiler: gcc
+      env:
+        - SCENARIOS=--vlt
+    - if: type = cron
+      dist: xenial
+      compiler: gcc
+      env:
+        - SCENARIOS=--vltmt
+    - if: type = cron
+      dist: xenial
+      compiler: clang
+      env:
+        - SCENARIOS=--dist
+    - if: type = cron
+      dist: xenial
+      compiler: clang
+      env:
+        - SCENARIOS=--vlt
+    - if: type = cron
+      dist: xenial
+      compiler: clang
+      env:
+        - SCENARIOS=--vltmt
+#    - if: type = cron
+#      os: osx
+#      compiler: gcc
+#      env:
+#        - SCENARIOS=--dist
+#    - if: type = cron
+#      os: osx
+#      compiler: gcc
+#      env:
+#        - SCENARIOS=--vlt
+#    - if: type = cron
+#      os: osx
+#      compiler: gcc
+#      env:
+#        - SCENARIOS=--vltmt
+    - if: type = cron
+      dist: trusty
+      compiler: gcc
+      env:
+        - SCENARIOS=--dist
+    - if: type = cron
+      dist: trusty
+      compiler: gcc
+      env:
+        - SCENARIOS=--vlt
+    - if: type = cron
+      dist: trusty
+      compiler: gcc
+      env:
+        - SCENARIOS=--vltmt
+
 cache: ccache
 
 # Some tests require gdb
 addons:
   apt:
     packages:
-    - gdb
-
-# Run three test slices in parallel
-env:
-  - TEST=--dist
-  - TEST=--vlt
-  - TEST=--vltmt
+      - gdb
 
 before_install:
 # Perl modules needed for testing
@@ -32,6 +106,6 @@ script:
   - >
     ./configure --enable-maintainer-mode --enable-longtests &&
     make -j $VLT_JOBS &&
-    make test SCENARIOS=$TEST DRIVER_FLAGS="-j 0 --quiet --rerun"
+    make test_regress DRIVER_FLAGS="-j 0 --quiet --rerun"
 after_script:
   - ccache -s

configure.ac

@@ -273,7 +273,9 @@ AC_SUBST(CFG_CXXFLAGS_PARSER)
 # without this flag, even though there's a conditional to prevent the divide.
 # We still don't add no-div-by-zero as it throws message to stdout, though doesn't die.
 #_MY_CXX_CHECK_OPT(-Wno-div-by-zero)
-_MY_CXX_CHECK_OPT(CFG_CXXFLAGS_NO_UNUSED,-faligned-new)
+# For some reason -faligned-new does not work under Travis w/ clang but the
+# configure test doesn't catch this either
+AS_IF([test "x$TRAVIS_COMPILER" != xclang], [_MY_CXX_CHECK_OPT(CFG_CXXFLAGS_NO_UNUSED,-faligned-new)])
 _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_NO_UNUSED,-fbracket-depth=4096)
 _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_NO_UNUSED,-Qunused-arguments)
 _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_NO_UNUSED,-Wno-bool-operation)

test_regress/t/t_leak.pl

@@ -7,22 +7,23 @@ 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.
 
-scenarios(vlt_all => 1);
-
-if ($ENV{TRAVIS} && $ENV{TRAVIS} eq 'true') {
-    skip("Fails occasionally on Travis-CI");
-} else {
-    compile(
-        make_top_shell => 0,
-        make_main => 0,
-        verilator_flags2 => ["--exe $Self->{t_dir}/$Self->{name}.cpp"],
-        );
-
-    execute(
-        check_finished => 1,
-        );
-
-    ok(1);
+if ($Self->{vltmt} && exists $ENV{TRAVIS_DIST} &&
+    $ENV{TRAVIS_DIST} eq "trusty")
+{
+    skip("Multithreaded test does not work under Travis w/ Ubuntu Trusty");
 }
 
+scenarios(vlt_all => 1);
+
+compile(
+    make_top_shell => 0,
+    make_main => 0,
+    verilator_flags2 => ["--exe $Self->{t_dir}/$Self->{name}.cpp"],
+    );
+
+execute(
+    check_finished => 1,
+    );
+
+ok(1);
 1;

test_regress/t/t_sys_sformat_noopt.pl

@@ -16,8 +16,7 @@ compile(
     verilator_flags2 => ["-O0"],
     );
 
-if ($Self->cxx_version =~ /clang version ([0-9]+\.[0-9]+)/
-    && ($1 >= 3.8 && $1 <= 5.0)) {
+if ($Self->cxx_version =~ /clang/) {
     skip("Known clang bug");
     #Here:   if (VL_UNLIKELY(VL_NEQ_W(12, __Vtemp1, vlSymsp->TOP__t.__PVT__str)))
 } else{