stat: determine whether it is BSD or GNU flavor

Seems like MacOS may have either in the path.

Signed-off-by: Alexey Neyman <stilor@att.net>

configure.ac

@@ -216,7 +216,6 @@ ACX_CHECK_PROGS_REQ([bison], [bison])
 ACX_CHECK_PROGS_REQ([flex], [flex])
 ACX_CHECK_PROGS_REQ([makeinfo], [makeinfo])
 ACX_CHECK_PROGS_REQ([cut], [cut])
-ACX_CHECK_PROGS_REQ([stat], [stat])
 ACX_CHECK_PROGS_REQ([readlink], [readlink])
 ACX_CHECK_PROGS_REQ([tar], [tar])
 ACX_CHECK_PROGS_REQ([gzip], [gzip])
@@ -233,6 +232,26 @@ AC_CHECK_PROGS([curl], [curl])
 ACX_SET_KCONFIG_OPTION([curl])
 AC_SUBST([curl])
 
+ACX_CHECK_PROGS_REQ([stat], [stat])
+AC_CACHE_CHECK([whether stat takes GNU or BSD format],
+    [acx_cv_stat_flavor],
+    [touch conftest
+     chmod 642 conftest
+     attr_bsd=`stat -f '%Lp' conftest 2>/dev/null`
+     attr_gnu=`stat -c '%a' conftest 2>/dev/null`
+     rm -f conftest
+     AS_IF([test "$attr_bsd" = "642"],
+       [acx_cv_stat_flavor=BSD],
+       [test "$attr_gnu" = "642"],
+       [acx_cv_stat_flavor=GNU],
+       [AC_MSG_ERROR([cannot determine stat(1) format option])])])
+
+# FIXME: support SET_KCONFIG_OPTION with string values? But then
+# again, these checks may be moved into ct-ng script.
+test "$acx_cv_stat_flavor" = "BSD" && stat_flavor_BSD=y
+ACX_SET_KCONFIG_OPTION([stat_flavor_BSD])
+test "$acx_cv_stat_flavor" = "GNU" && stat_flavor_GNU=y
+ACX_SET_KCONFIG_OPTION([stat_flavor_GNU])
 
 #--------------------------------------------------------------------
 # Still boring, but remember the path, now...

scripts/functions

@@ -567,15 +567,15 @@ CT_DoForceRmdir() {
     local mode
     for dir in "${@}"; do
         [ -d "${dir}" ] || continue
-        case "$CT_SYS_OS" in
-            Linux|CYGWIN*)
+        case "${CT_CONFIGURE_has_stat_flavor_GNU},${CT_CONFIGURE_has_stat_flavor_BSD}" in
+            y,*)
                 mode="$(stat -c '%a' "$(dirname "${dir}")")"
                 ;;
-            Darwin|*BSD)
+            *,y)
                 mode="$(stat -f '%Lp' "$(dirname "${dir}")")"
                 ;;
             *)
-                CT_Abort "Unhandled host OS $CT_SYS_OS"
+                CT_Abort "Unknown stat format options"
                 ;;
         esac
         CT_DoExecLog ALL chmod u+w "$(dirname "${dir}")"

scripts/scripts.mk

@@ -0,0 +1,64 @@
+# Makefile for the scripts/ sub-directory
+
+# Here, we can update the config.* scripts.
+# If we're in CT_LIB_DIR, then CT_LIB_DIR == CT_TOP_DIR, and we can update those
+# scripts for later inclusion mainline. If CT_LIB_DIR != CT_TOP_DIR, then those
+# scripts are downloaded only for use in CT_TOP_DIR.
+
+# ----------------------------------------------------------
+# The tools help entry
+
+help-distrib::
+	@echo  '  updatetools        - Update the config tools'
+
+# ----------------------------------------------------------
+# Where to get tools from, and where to store them into
+# The tools are: config.guess and config.sub
+
+CONFIG_SUB_SRC="http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD"
+CONFIG_SUB_DEST=scripts/config.sub
+CONFIG_GUESS_SRC="http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD"
+CONFIG_GUESS_DEST=scripts/config.guess
+
+PHONY += updatetools
+updatetools: $(CONFIG_SUB_DEST) $(CONFIG_GUESS_DEST)
+
+# ----------------------------------------------------------
+# How to retrieve the tools
+
+ifneq ($(strip $(V)),2)
+  wget_silent_opt = -o /dev/null
+  curl_silent_opt = --silent
+endif
+
+ifneq (wget,)
+download_cmd = wget --passive-ftp $(wget_silent_opt) -O $@
+else
+ifneq (curl,)
+download_cmd = curl --ftp-pasv $(curl_silent_opt) -o $@
+else
+download_cmd = $(error wget or curl needed for downloads)
+endif
+endif
+
+PHONY += scripts
+scripts:
+	@$(CT_ECHO) '  MKDIR $@'
+	$(SILENT)mkdir -p $@
+
+$(CONFIG_SUB_DEST): scripts FORCE
+	@$(CT_ECHO) '  DOWNLOAD  $@'
+	$(SILENT)$(download_cmd) $(CONFIG_SUB_SRC)
+	$(SILENT)chmod u+rwx,go+rx-w $@
+
+$(CONFIG_GUESS_DEST): scripts FORCE
+	@$(CT_ECHO) '  DOWNLOAD  $@'
+	$(SILENT)$(download_cmd) $(CONFIG_GUESS_SRC)
+	$(SILENT)chmod u+rwx,go+rx-w $@
+
+# ----------------------------------------------------------
+# Clean up the mess
+
+distclean::
+	@$(CT_ECHO) "  CLEAN scripts"
+	$(SILENT)[ $(CT_TOP_DIR) = $(CT_LIB_DIR) ] || rm -rf $(CT_TOP_DIR)/scripts