[ptxdist] [PATCH] configure/Makefile: Check for touch --no-dereference support

[jon@ringle.org]

From: Jon Ringle <jringle@gridpoint.com>

Install a wrapper touch that will strip --no-dereference from the args
if the host installed touch does not support it

Signed-off-by: Jon Ringle <jringle@gridpoint.com>
---
 Makefile.in  | 14 ++++++++++++++
 configure.ac |  8 ++++++++
 2 files changed, 22 insertions(+)

diff --git a/Makefile.in b/Makefile.in
index 64dc808..5787699 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -39,6 +39,18 @@ kconfig:
 		conf mconf $(NCONF)
 	@echo "done."
 
+define touch_wrapper
+#!/bin/bash
+
+declare -a args
+args=($${@})
+
+[ -n "@TOUCH_NO_DEREFERENCE@" ] || args=($${@//--no-dereference/})
+
+@GNU_touch@ $${args[*]}
+endef
+export touch_wrapper
+
 environment:
 	@echo -n "preparing PTXdist environment ..."
 	@ln -sf @AWK@ "$(abs_srcdir)/bin/awk"
@@ -69,6 +81,8 @@ environment:
 	@ln -sf @BASH@  "$(abs_srcdir)/bin/bash"
 	@ln -sf @SYSCTL@ "$(abs_srcdir)/bin/sysctl"
 	@ln -sf @MAKE@ "$(abs_srcdir)/bin/make"
+	@echo "$$touch_wrapper" > "$(abs_srcdir)/bin/touch"
+	@chmod +x "$(abs_srcdir)/bin/touch"
 	@echo " done"
 
 clean:
diff --git a/configure.ac b/configure.ac
index 22c8df0..5fed6c9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -158,6 +158,7 @@ GNU_TOOL(sort, coreutils)
 GNU_TOOL(cat, coreutils)
 GNU_TOOL(tty, coreutils)
 GNU_TOOL(readlink, coreutils)
+GNU_TOOL(touch, coreutils)
 GNU_TOOL(tar, tar)
 GNU_TOOL(find, findutils)
 GNU_TOOL(xargs, findutils)
@@ -278,6 +279,13 @@ if test -z "$MSGFMT"; then
 	AC_MSG_ERROR([gettext could not be found, please install])
 fi
 
+dnl Check for touch --no-dereference support
+AC_CACHE_CHECK([for touch that supports --no-dereference], [ac_cv_path_TOUCH_NO_DEREFERENCE],
+		   [AC_PATH_PROGS_FEATURE_CHECK([TOUCH_NO_DEREFERENCE], [touch],
+		     [[$ac_path_TOUCH_NO_DEREFERENCE --no-dereference /dev/null 2> /dev/null && \
+		         ac_cv_path_TOUCH_NO_DEREFERENCE=$ac_path_TOUCH_NO_DEREFERENCE ac_path_TOUCH_NO_DEREFERENCE_found=:]])])
+AC_SUBST([TOUCH_NO_DEREFERENCE], [$ac_cv_path_TOUCH_NO_DEREFERENCE])
+
 dnl
 dnl Checks for Python, needed for ipkg-utils
 dnl
-- 
1.8.5.4


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