Enable C++11 testing by default, Appveyor testing scaled back

./configure now enables C++11 and later C++ standards testing by default (when
running: 'make check').

The options to control this testing are the same:

  ./configure --enable-cpp11-testing
  ./configure --disable-cpp11-testing

But the former is now the default and the latter can be used to turn off C++11 and
later C++ standards testing.

Reduce the number of tests on Appveyor by only running 32-bit (x86) using
latest Visual Studio (2022). Drop 32-bit Cygwin and MinGW testing.
Add C# and Java testing on VS2022 and drop Java testing on older Visual Studio.
This reduces the really long run times on Appveyor, however, VS2022 is
somewhat slower than older compilers.

.github/workflows/ci.yml

@@ -392,7 +392,8 @@ jobs:
             esac
             echo CSTD="$CSTD" >> $GITHUB_ENV
           fi
-          if test -n "$CPPSTD"; then CONFIGOPTS+=(--enable-cpp11-testing "CXXFLAGS=-std=$CPPSTD $CXXFLAGS"); fi
+          if test -z "$CPPSTD"; then CONFIGOPTS+=("--disable-cpp11-testing"); fi
+          if test -n "$CPPSTD"; then CONFIGOPTS+=("CXXFLAGS=-std=$CPPSTD $CXXFLAGS"); fi
           if test -n "$CSTD"; then CONFIGOPTS+=("CFLAGS=-std=$CSTD $CFLAGS"); fi
           if test -n "$SWIGLANG"; then CONFIGOPTS+=(--without-alllang --with-$WITHLANG); fi
           echo "${CONFIGOPTS[@]}"

CHANGES.current

@@ -7,6 +7,18 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
 Version 4.1.0 (in progress)
 ===========================
 
+2022-04-06: wsfulton
+            ./configure now enables C++11 and later C++ standards testing by default (when
+            running: 'make check').
+
+            The options to control this testing are the same:
+
+              ./configure --enable-cpp11-testing
+              ./configure --disable-cpp11-testing
+
+            But the former is now the default and the latter can be used to turn off C++11 and
+            later C++ standards testing.
+
 2022-04-06: wsfulton
             [Python] #1635 The "autodoc" feature no longer overrides Doxygen comments
             in the generated docstring.

appveyor.yml

@@ -1,5 +1,4 @@
 platform:
-- x86
 - x64
 
 skip_commits:
@@ -18,8 +17,6 @@ environment:
     VSVER: 12
   - SWIGLANG: csharp
     VSVER: 14
-  - SWIGLANG: java
-    VSVER: 14
   - SWIGLANG: python
     VSVER: 14
     VER: 27
@@ -34,10 +31,29 @@ environment:
     VSVER: 16
     VER: 39
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+  - SWIGLANG: csharp
+    VSVER: 17
+    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
+  - SWIGLANG: csharp
+    VSVER: 17
+    Platform: x86
+    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
+  - SWIGLANG: java
+    VSVER: 17
+    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
+  - SWIGLANG: java
+    VSVER: 17
+    Platform: x86
+    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
   - SWIGLANG: python
     VSVER: 17
     VER: 310
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
+  - SWIGLANG: python
+    VSVER: 17
+    VER: 310
+    Platform: x86
+    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
   - SWIGLANG: python
     OSVARIANT: cygwin
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
@@ -160,8 +176,8 @@ build_script:
 - if "%BUILDSYSTEM%"=="cmake" cmake --version && cmake -G "Visual Studio 14 2015%VSARCH%" -DCMAKE_INSTALL_PREFIX="%CD:\=/%/install2" -DCMAKE_C_FLAGS="/WX /DPCRE2_STATIC" -DCMAKE_CXX_FLAGS="/WX /DPCRE2_STATIC" -DPCRE2_INCLUDE_DIR=%PCRE_ROOT%/include -DPCRE2_LIBRARY=%PCRE_ROOT%/lib/pcre2-8-static.lib -DBISON_EXECUTABLE=C:/cygwin/bin/bison.exe . && cmake --build . --config Release --target install && ctest --output-on-failure -V -C Release && appveyor exit
 - if "%OSVARIANT%"=="" bash -c "exec 0</dev/null && cd pcre2-pcre2-10.39 && ./autogen.sh && ./configure CC=$CC CXX=$CXX CFLAGS='-O2' LDFLAGS='--cccl-link /LTCG' --prefix=%PCRE_ROOT% --disable-shared && time make -s -j%MAKEJOBS% LN_S=cp && make install && cd .. && cp -v %PCRE_ROOT%/lib/libpcre2-8.lib %PCRE_ROOT%/lib/pcre2-8.lib"
   # Open dummy file descriptor to fix error on cygwin: ./configure: line 560: 0: Bad file descriptor
-- if "%OSVARIANT%"=="" bash -c "exec 0</dev/null && ./autogen.sh && time ./configure --disable-dependency-tracking --disable-ccache --enable-cpp11-testing CC=$CC CXX=$CXX CFLAGS='-O2' CXXFLAGS='-O2' LDFLAGS='--cccl-link /LTCG' PCRE2_CFLAGS='-I%PCRE_ROOT%/include -DPCRE2_STATIC' PCRE2_LIBS='-L%PCRE_ROOT%/lib/ -lpcre2-8' --without-perl5 --without-go --with-boost=%BOOSTROOT% || cat config.log"
+- if "%OSVARIANT%"=="" bash -c "exec 0</dev/null && ./autogen.sh && time ./configure --disable-dependency-tracking --disable-ccache CC=$CC CXX=$CXX CFLAGS='-O2' CXXFLAGS='-O2' LDFLAGS='--cccl-link /LTCG' PCRE2_CFLAGS='-I%PCRE_ROOT%/include -DPCRE2_STATIC' PCRE2_LIBS='-L%PCRE_ROOT%/lib/ -lpcre2-8' --without-perl5 --without-go --with-boost=%BOOSTROOT% || cat config.log"
-- if not "%OSVARIANT%"=="" bash -c "exec 0</dev/null && ./autogen.sh && time ./configure CC=%CC% CXX=%CXX% --without-alllang --with-$SWIGLANG$PY3$SWIGWITHLANG --enable-cpp11-testing || cat config.log"
+- if not "%OSVARIANT%"=="" bash -c "exec 0</dev/null && ./autogen.sh && time ./configure CC=%CC% CXX=%CXX% --without-alllang --with-$SWIGLANG$PY3$SWIGWITHLANG || cat config.log"
 - bash -c "time make -s -j%MAKEJOBS%"
 
 test_script:

configure.ac

@@ -282,7 +282,7 @@ fi
 AC_MSG_RESULT($LINKFORSHARED)
 
 # Optional CFLAGS used to silence/enhance compiler warnings on some platforms.
-AC_MSG_CHECKING(PLATCFLAGS)
+AC_MSG_CHECKING(CFLAGS to use for testing (PLATCFLAGS))
 case $host in
   *-*-solaris*) if test "$GCC" = yes
     then PLATCFLAGS=
@@ -295,8 +295,8 @@ esac
 AC_MSG_RESULT($PLATCFLAGS)
 
 # Add switch if necessary to enable C++11 support - just for tests
-AC_ARG_ENABLE([cpp11-testing], AS_HELP_STRING([--enable-cpp11-testing], [enable C++11 testing if supported by compiler (default disabled)]), [enable_cpp11_testing=$enableval], [enable_cpp11_testing=no])
+AC_ARG_ENABLE([cpp11-testing], AS_HELP_STRING([--disable-cpp11-testing], [disable C++11 and later C++ standards testing even if supported by compiler (default enabled)]), [enable_cpp11_testing=$enableval], [enable_cpp11_testing=yes])
-AC_MSG_CHECKING([whether to attempt to enable C++11 testing])
+AC_MSG_CHECKING([whether to attempt to enable C++11 and later C++ standards testing])
 AC_MSG_RESULT([$enable_cpp11_testing])
 
 PLATCXXFLAGS="$PLATCFLAGS"
@@ -307,7 +307,7 @@ if test x"$enable_cpp11_testing" = xyes; then
   # Test for c++17
   CXXCPP=" "
   AX_CXX_COMPILE_STDCXX(17, [noext], [optional])
-  AC_MSG_CHECKING([whether C++17 and earlier testing is enabled])
+  AC_MSG_CHECKING([whether C++11 to C++17 testing is enabled])
   if test "$HAVE_CXX17" = "1"; then
     AC_MSG_RESULT([yes])
     PLATCXXFLAGS="$CXXCPP $PLATCXXFLAGS"
@@ -320,7 +320,7 @@ if test x"$enable_cpp11_testing" = xyes; then
     CXXCPP=" "
     CXX=$CXX_SAVED
     AX_CXX_COMPILE_STDCXX(14, [noext], [optional])
-    AC_MSG_CHECKING([whether C++14 and earlier testing is enabled])
+    AC_MSG_CHECKING([whether C++11 to C++14 testing is enabled])
     if test "$HAVE_CXX14" = "1"; then
       AC_MSG_RESULT([yes])
       PLATCXXFLAGS="$CXXCPP $PLATCXXFLAGS"
@@ -332,16 +332,14 @@ if test x"$enable_cpp11_testing" = xyes; then
       CXXCPP=" "
       CXX=$CXX_SAVED
       AX_CXX_COMPILE_STDCXX(11, [noext], [optional])
-      AC_MSG_CHECKING([whether C++11 and earlier testing is enabled])
+      AC_MSG_CHECKING([whether C++11 testing is enabled])
       if test "$HAVE_CXX11" = "1"; then
         AC_MSG_RESULT([yes])
         PLATCXXFLAGS="$CXXCPP $PLATCXXFLAGS"
       else
         AC_MSG_RESULT([no])
       fi
-
     fi
-
   fi
 
   CXX=$CXX_SAVED
@@ -362,6 +360,10 @@ case $host in
   *) ;;
 esac
 
+AC_MSG_CHECKING(CXXFLAGS to use for testing (PLATCXXFLAGS))
+PLATCXXFLAGS=$(echo $PLATCXXFLAGS | xargs) # Trim whitespace
+AC_MSG_RESULT([$PLATCXXFLAGS])
+
 # Check for compiler pre-compiled header support
 AC_MSG_CHECKING([if compiler supports pre-compiled headers])
 PCHSUPPORT=no