msvcp: Implement the WCHAR version of _Unlink.

Signed-off-by: Stefan Dösinger <stefan@codeweavers.com>
Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/msvcp120/msvcp120.spec

diff --git a/dlls/msvcp120/msvcp120.spec b/dlls/msvcp120/msvcp120.spec
index b3f2223..4d46be4 100644
--- a/dlls/msvcp120/msvcp120.spec
+++ b/dlls/msvcp120/msvcp120.spec
@@ -1768,8 +1768,8 @@
 @ cdecl -arch=win64 ?_Tidy@ios_base@std@@AEAAXXZ(ptr) ios_base_Tidy
 @ cdecl -arch=win32 ?_Unlink@sys@tr2@std@@YAHPBD@Z(str) tr2_sys__Unlink
 @ cdecl -arch=win64 ?_Unlink@sys@tr2@std@@YAHPEBD@Z(str) tr2_sys__Unlink
-@ stub -arch=win32 ?_Unlink@sys@tr2@std@@YAHPB_W@Z
-@ stub -arch=win64 ?_Unlink@sys@tr2@std@@YAHPEB_W@Z
+@ cdecl -arch=win32 ?_Unlink@sys@tr2@std@@YAHPB_W@Z(wstr) tr2_sys__Unlink_wchar
+@ cdecl -arch=win64 ?_Unlink@sys@tr2@std@@YAHPEB_W@Z(wstr) tr2_sys__Unlink_wchar
 @ cdecl -arch=arm ?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UAAXXZ(ptr) basic_streambuf_char__Unlock
 @ thiscall -arch=i386 ?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UAEXXZ(ptr) basic_streambuf_char__Unlock
 @ cdecl -arch=win64 ?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAAXXZ(ptr) basic_streambuf_char__Unlock

dlls/msvcp120_app/msvcp120_app.spec

diff --git a/dlls/msvcp120_app/msvcp120_app.spec b/dlls/msvcp120_app/msvcp120_app.spec
index 4d4c88e..fd99058 100644
--- a/dlls/msvcp120_app/msvcp120_app.spec
+++ b/dlls/msvcp120_app/msvcp120_app.spec
@@ -1768,8 +1768,8 @@
 @ cdecl -arch=win64 ?_Tidy@ios_base@std@@AEAAXXZ(ptr) msvcp120.?_Tidy@ios_base@std@@AEAAXXZ
 @ cdecl -arch=win32 ?_Unlink@sys@tr2@std@@YAHPBD@Z(str) msvcp120.?_Unlink@sys@tr2@std@@YAHPBD@Z
 @ cdecl -arch=win64 ?_Unlink@sys@tr2@std@@YAHPEBD@Z(str) msvcp120.?_Unlink@sys@tr2@std@@YAHPEBD@Z
-@ stub -arch=win32 ?_Unlink@sys@tr2@std@@YAHPB_W@Z
-@ stub -arch=win64 ?_Unlink@sys@tr2@std@@YAHPEB_W@Z
+@ cdecl -arch=win32 ?_Unlink@sys@tr2@std@@YAHPB_W@Z(wstr) msvcp120.?_Unlink@sys@tr2@std@@YAHPB_W@Z
+@ cdecl -arch=win64 ?_Unlink@sys@tr2@std@@YAHPEB_W@Z(wstr) msvcp120.?_Unlink@sys@tr2@std@@YAHPEB_W@Z
 @ cdecl -arch=arm ?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UAAXXZ(ptr) msvcp120.?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UAAXXZ
 @ thiscall -arch=i386 ?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UAEXXZ(ptr) msvcp120.?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UAEXXZ
 @ cdecl -arch=win64 ?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAAXXZ(ptr) msvcp120.?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAAXXZ

dlls/msvcp140/msvcp140.spec

diff --git a/dlls/msvcp140/msvcp140.spec b/dlls/msvcp140/msvcp140.spec
index 80840db..74ff305 100644
--- a/dlls/msvcp140/msvcp140.spec
+++ b/dlls/msvcp140/msvcp140.spec
@@ -3737,7 +3737,7 @@
 @ cdecl _Toupper(long ptr) _Toupper
 @ cdecl _Towlower(long ptr) _Towlower
 @ cdecl _Towupper(long ptr) _Towupper
-@ stub _Unlink
+@ cdecl _Unlink(wstr) tr2_sys__Unlink_wchar
 @ cdecl _Unlock_shared_ptr_spin_lock()
 @ stub _WStod
 @ stub _WStodx

dlls/msvcp90/ios.c

diff --git a/dlls/msvcp90/ios.c b/dlls/msvcp90/ios.c
index 28deae0..36e5067 100644
--- a/dlls/msvcp90/ios.c
+++ b/dlls/msvcp90/ios.c
@@ -15060,6 +15060,18 @@
     return GetLastError();
 }
 
+/* ?_Unlink@sys@tr2@std@@YAHPB_W@Z */
+/* ?_Unlink@sys@tr2@std@@YAHPEB_W@Z */
+/* _Unlink */
+int __cdecl tr2_sys__Unlink_wchar(WCHAR const* path)
+{
+    TRACE("(%s)\n", debugstr_w(path));
+
+    if(DeleteFileW(path))
+        return ERROR_SUCCESS;
+    return GetLastError();
+}
+
 /* ??0strstream@std@@QAE@PADHH@Z */
 /* ??0strstream@std@@QEAA@PEAD_JH@Z */
 #if STREAMSIZE_BITS == 64