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.

2 files changed, 5 insertions, 0 deletions

diff --git a/nt/gnulib-cfg.mk b/nt/gnulib-cfg.mk
index 09cd5822578..91f30ec7149 100644
--- a/nt/gnulib-cfg.mk
+++ b/nt/gnulib-cfg.mk
@@ -62,3 +62,4 @@ OMIT_GNULIB_MODULE_sys_stat = true
 OMIT_GNULIB_MODULE_sys_time = true
 OMIT_GNULIB_MODULE_sys_types = true
 OMIT_GNULIB_MODULE_unistd = true
+OMIT_GNULIB_MODULE_canonicalize-lgpl = true
diff --git a/nt/mingw-cfg.site b/nt/mingw-cfg.site
index e15d14cc392..dfdca3926f9 100644
--- a/nt/mingw-cfg.site
+++ b/nt/mingw-cfg.site
@@ -86,6 +86,10 @@ gl_cv_func_readlink_works=yes
 gl_cv_func_symlink_works=yes
 ac_cv_func_readlinkat=yes
 ac_cv_func_faccessat=yes
+# Avoid compiling Gnulib's canonicalize-lgpl.c, which fails
+ac_cv_func_canonicalize_file_name=yes
+ac_cv_func_realpath="not-needed"
+gl_cv_func_realpath_works="no-but-not-needed-so-yes"
 # Implemented in w32.c
 ac_cv_func_fcntl=yes
 gl_cv_func_fcntl_f_dupfd_cloexec=yes