[SV 63516] [DOS] Support include files with drivespecs

* src/makeint.h (HAVE_DRIVESPEC): Create a macro to check.
* src/main.c (.FEATURES): Add "dospaths" as a feature.
* src/read.c (eval_makefile) [DOS]: If the included makefile name
starts with a drivespec, don't search the include directories.
* doc/make.texi (Include): Document this behavior.
* tests/scripts/features/include: Add a test.

1 files changed, 11 insertions, 1 deletions

diff --git a/tests/scripts/features/include b/tests/scripts/features/include
index 69d67181..7f216434 100644
--- a/tests/scripts/features/include
+++ b/tests/scripts/features/include
@@ -1,4 +1,4 @@
-#                                     -*-mode: perl; rm-trailing-spaces: nil-*-
+#                                                              -*-mode: perl-*-
 
 $description = "Test various forms of the GNU make 'include' command.";
 
@@ -462,4 +462,14 @@ run_make_with_options(undef, ['-E', '%:;@echo $@', '-E', 'all:;', '-E', '-includ
 $answer = "bizbaz\nbazbiz\nfoobar\nbarfoo\n$defaults\n#MAKE#: 'all' is up to date.\n";
 &compare_output(subst_make_string($answer), &get_logfile(1));
 
+# SV 63516
+if (exists $FEATURES{'dospaths'}) {
+    run_make_test(q!
+include C:__foobar
+%bar: ; @echo $@
+all: ;
+!,
+                  '', "C:__foobar\n#MAKE#: 'all' is up to date.");
+}
+
 1;