Prefer PATH_MAX to MAXPATHLEN

PATH_MAX is standardized, MAXPATHLEN is not.
Also, the Gnulib pathmax module fixes some rare bugs with PATH_MAX.
So prefer PATH_MAX to MAXPATHLEN unless we know the latter is
also correct (for some platform-specific code).
* admin/merge-gnulib (GNULIB_MODULES): Add pathmax.
This module was already present, as a dependency of canonicalize-lgpl,
but now Emacs is using it directly.  Sort.
* lib-src/emacsclient.c: Include stdint.h, pathmax.h.
(get_current_dir_name): Sync to current src/sysdep.c.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
* src/sysdep.c: Include pathmax.h.
(get_current_dir_name_or_unreachable):
Use PATH_MAX instead of MAXPATHLEN.

1 files changed, 3 insertions, 2 deletions

diff --git a/admin/merge-gnulib b/admin/merge-gnulib
index 6cf29589f71..42e9c0c8645 100755
--- a/admin/merge-gnulib
+++ b/admin/merge-gnulib
@@ -27,9 +27,9 @@ GNULIB_URL=git://git.savannah.gnu.org/gnulib.git
 
 GNULIB_MODULES='
   alloca-opt binary-io byteswap c-ctype c-strcase
+  canonicalize-lgpl
   careadlinkat close-stream copy-file-range
   count-leading-zeros count-one-bits count-trailing-zeros
-  canonicalize-lgpl
   crypto/md5-buffer crypto/sha1-buffer crypto/sha256-buffer crypto/sha512-buffer
   d-type diffseq dosname dtoastr dtotimespec dup2
   environ execinfo explicit_bzero faccessat
@@ -38,7 +38,8 @@ GNULIB_MODULES='
   getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog
   ieee754-h ignore-value intprops largefile lstat
   manywarnings memmem-simple memrchr minmax mkostemp mktime nstrftime
-  pipe2 pselect pthread_sigmask putenv qcopy-acl readlink readlinkat regex
+  pathmax pipe2 pselect pthread_sigmask putenv
+  qcopy-acl readlink readlinkat regex
   sig2str socklen stat-time std-gnu11 stdalign stddef stdio
   stpcpy strnlen strtoimax symlink sys_stat sys_time
   tempname time time_r time_rz timegm timer-time timespec-add timespec-sub