Fix MS-Windows build as followup to pdumper executable lookup

* src/w32.c (w32_my_exename): New function.
* src/w32.h (w32_my_exename): Add prototype.
* src/emacs.c (load_pdump_find_executable) [WINDOWSNT]: Find
the actual file name of the program without looking along
PATH, by calling w32_my_exename.

* nt/mingw-cfg.site (ac_cv_func_canonicalize_file_name)
(ac_cv_func_realpath, gl_cv_func_realpath_works): Disable
testing.
* nt/gnulib-cfg.mk (OMIT_GNULIB_MODULE_canonicalize-lgpl): Set
to true.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/w32.h b/src/w32.h
index 3790583bfc8..3ef78ecdee2 100644
--- a/src/w32.h
+++ b/src/w32.h
@@ -185,6 +185,7 @@ extern MultiByteToWideChar_Proc pMultiByteToWideChar;
 extern WideCharToMultiByte_Proc pWideCharToMultiByte;
 extern DWORD multiByteToWideCharFlags;
 
+extern char *w32_my_exename (void);
 extern const char *w32_relocate (const char *);
 
 extern void init_environment (char **);