Add test for build of libpqxx with enabled exceptions

This resolves FTBFS with libpqxx 3.x

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

kexi/kexidb/drivers/configure.in.in

@@ -248,31 +248,56 @@ if test "$compile_pgsql_plugin" = "yes"; then
   AC_LANG_SAVE
   AC_LANG_CPLUSPLUS
   SAVED_CXXFLAGS="$CXXFLAGS"
-  for CXX_STD_TEST in "" 11 14 17; do
+  AC_MSG_CHECKING([PostgreSQL build with default flags])
-    CXXFLAGS="$SAVED_CXXFLAGS"
+  PQXX_CXXFLAGS=""
-    if test "x$CXX_STD_TEST" = "x"; then
+  CXXFLAGS="$SAVED_CXXFLAGS $PQXX_CXXFLAGS"
-      AC_MSG_CHECKING([PostgreSQL build with default C++ standard])
+  AC_TRY_COMPILE([
-    else
+      #include <$PQXX_INCDIR/pqxx/pqxx>
-      AC_MSG_CHECKING([PostgreSQL build with C++$CXX_STD_TEST])
+    ],[ ],
-      CXXFLAGS=-std=c++$CXX_STD_TEST
+    pqxx_flags=yes,
-    fi
+    pqxx_flags=no
+  )
+  if test "x$pqxx_flags" = "xno"; then
+    AC_MSG_RESULT(no)
+    AC_MSG_CHECKING([PostgreSQL build with enabled exceptions])
+    PQXX_CXXFLAGS+=" $USE_EXCEPTIONS"
+    CXXFLAGS="$SAVED_CXXFLAGS $PQXX_CXXFLAGS"
     AC_TRY_COMPILE([
         #include <$PQXX_INCDIR/pqxx/pqxx>
       ],[ ],
-      pqxx_cxx_std=yes,
+      pqxx_exceptions=yes,
-      pqxx_cxx_std=no
+      pqxx_exceptions=no
     )
-    if test "x$pqxx_cxx_std" = "xyes"; then
+    if test "x$pqxx_exceptions" = "xno"; then
-      PQXX_CXXFLAGS=$CXXFLAGS
-      compile_pgsql_plugin="yes"
-      AC_SUBST(PQXX_CXXFLAGS)
-      AC_MSG_RESULT(yes)
-      break
-    else
-      compile_pgsql_plugin="no"
       AC_MSG_RESULT(no)
+      for CXX_STD_TEST in 11 14 17; do
+        AC_MSG_CHECKING([PostgreSQL build with C++$CXX_STD_TEST])
+        CXXFLAGS="$SAVED_CXXFLAGS $PQXX_CXXFLAGS -std=c++$CXX_STD_TEST"
+        AC_TRY_COMPILE([
+            #include <$PQXX_INCDIR/pqxx/pqxx>
+          ],[ ],
+          pqxx_cxx_std=yes,
+          pqxx_cxx_std=no
+        )
+        if test "x$pqxx_cxx_std" = "xyes"; then
+          AC_MSG_RESULT(yes)
+          compile_pgsql_plugin="yes"
+          PQXX_CXXFLAGS+=" -std=c++$CXX_STD_TEST"
+          AC_SUBST(PQXX_CXXFLAGS)
+          break
+        else
+          AC_MSG_RESULT(no)
+          compile_pgsql_plugin="no"
+        fi
+      done
+    else
+      AC_MSG_RESULT(yes)
+      AC_SUBST(PQXX_CXXFLAGS)
     fi
-  done
+  else
+    AC_MSG_RESULT(yes)
+    AC_SUBST(PQXX_CXXFLAGS)
+  fi
   CXXFLAGS="$SAVED_CXXFLAGS"
   AC_LANG_RESTORE
 fi