[PATCH] [testsuite] Make the testsuite work on mingw

["Christian Biesinger via gdb-patches" <gdb-patches@sourceware.org>]

Dejagnu produces an objdir like /c/, but GDB expects something like c:/.
So fix it up in lib/gdb.exp.

gdb/testsuite/ChangeLog:

2019-08-14  Christian Biesinger  <cbiesinger@google.com>

	* lib/gdb.exp: When running on a mingw target, replace
	/x/ with x:/.
---
 gdb/testsuite/lib/gdb.exp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index edc8dfcdfd..af56e8aa12 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -4724,6 +4724,10 @@ proc standard_output_file {basename} {
 
     set dir [make_gdb_parallel_path outputs $subdir $gdb_test_file_name]
     file mkdir $dir
+    # If running on MinGW, replace /c/foo with c:/foo
+    if { [ishost *-*-mingw*] } {
+        set dir [regsub {^/([a-z])/} $dir {\1:/}]
+    }
     return [file join $dir $basename]
 }
 
-- 
2.23.0.rc1.153.gdeed80330f-goog