Add -Wlogical-op to standard compiler flags, if supported

configure

@@ -4072,6 +4072,66 @@ if test x"$pgac_cv_prog_cc_cflags__Wendif_labels" = x"yes"; then
   CFLAGS="$CFLAGS -Wendif-labels"
 fi
+  { $as_echo "$as_me:$LINENO: checking whether $CC supports -Wlogical-op" >&5
+$as_echo_n "checking whether $CC supports -Wlogical-op... " >&6; }
+if test "${pgac_cv_prog_cc_cflags__Wlogical_op+set}" = set; then
+  $as_echo_n "(cached) " >&6
+else
+  pgac_save_CFLAGS=$CFLAGS
+CFLAGS="$pgac_save_CFLAGS -Wlogical-op"
+ac_save_c_werror_flag=$ac_c_werror_flag
+ac_c_werror_flag=yes
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  pgac_cv_prog_cc_cflags__Wlogical_op=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	pgac_cv_prog_cc_cflags__Wlogical_op=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_c_werror_flag=$ac_save_c_werror_flag
+CFLAGS="$pgac_save_CFLAGS"
+fi
+{ $as_echo "$as_me:$LINENO: result: $pgac_cv_prog_cc_cflags__Wlogical_op" >&5
+$as_echo "$pgac_cv_prog_cc_cflags__Wlogical_op" >&6; }
+if test x"$pgac_cv_prog_cc_cflags__Wlogical_op" = x"yes"; then
+  CFLAGS="$CFLAGS -Wlogical-op"
+fi
+
   { $as_echo "$as_me:$LINENO: checking whether $CC supports -Wmissing-format-attribute" >&5
 $as_echo_n "checking whether $CC supports -Wmissing-format-attribute... " >&6; }
 if test "${pgac_cv_prog_cc_cflags__Wmissing_format_attribute+set}" = set; then

configure.in

@@ -410,6 +410,7 @@ if test "$GCC" = yes -a "$ICC" = no; then
   # These work in some but not all gcc versions
   PGAC_PROG_CC_CFLAGS_OPT([-Wdeclaration-after-statement])
   PGAC_PROG_CC_CFLAGS_OPT([-Wendif-labels])
+  PGAC_PROG_CC_CFLAGS_OPT([-Wlogical-op])
   PGAC_PROG_CC_CFLAGS_OPT([-Wmissing-format-attribute])
   # This was included in -Wall/-Wformat in older GCC versions
   PGAC_PROG_CC_CFLAGS_OPT([-Wformat-security])