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, 2 insertions, 2 deletions

diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in
index b4d510bd62e..6f978aeb0cc 100644
--- a/lib/gnulib.mk.in
+++ b/lib/gnulib.mk.in
@@ -120,6 +120,7 @@
 #  mkostemp \
 #  mktime \
 #  nstrftime \
+#  pathmax \
 #  pipe2 \
 #  pselect \
 #  pthread_sigmask \
@@ -1076,6 +1077,7 @@ gl_GNULIB_ENABLED_getdtablesize = @gl_GNULIB_ENABLED_getdtablesize@
 gl_GNULIB_ENABLED_getgroups = @gl_GNULIB_ENABLED_getgroups@
 gl_GNULIB_ENABLED_malloca = @gl_GNULIB_ENABLED_malloca@
 gl_GNULIB_ENABLED_open = @gl_GNULIB_ENABLED_open@
+gl_GNULIB_ENABLED_pathmax = @gl_GNULIB_ENABLED_pathmax@
 gl_GNULIB_ENABLED_strtoll = @gl_GNULIB_ENABLED_strtoll@
 gl_LIBOBJS = @gl_LIBOBJS@
 gl_LTLIBOBJS = @gl_LTLIBOBJS@
@@ -2110,9 +2112,7 @@ endif
 ## begin gnulib module pathmax
 ifeq (,$(OMIT_GNULIB_MODULE_pathmax))
 
-ifneq (,$(gl_GNULIB_ENABLED_pathmax))
 
-endif
 EXTRA_DIST += pathmax.h
 
 endif