[OE-core] [PATCH v6] libtool: fix resolve of lt_sysroot

[Hans Beckerus]

This patch updates libtool.m4 (and its output) to resolve a problem 
with variable 'lt_sysroot' not being properly updated if the option
'--with[-libtool]-sysroot' is not provided when running the 'configure'
script for a package.

According to the help text ouput from 'configure':
--with-libtool-sysroot=DIR Search for dependent libraries within DIR
                        (or the compiler's sysrooot if not specified).

Due to mixed up cases in a switch statement, when checking if the option
was specified or not, wrong actions were taken resulting in an incorrect
sysroot and failures to properly locate e.g. .la files when using the 
populated SDK toolchain.

For current upstream status see:
http://lists.gnu.org/archive/html/bug-libtool/2013-09/msg00005.html

Signed-off-by: Hans Beckerus <hans.beckerus at gmail.com>
---
Changes since v5:
* Fixes a precedence issue in the switch case
---
 meta/recipes-devtools/libtool/libtool-2.4.2.inc    |    1 +
 .../libtool/libtool/fix-resolve-lt-sysroot.patch   |   41 ++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 meta/recipes-devtools/libtool/libtool/fix-resolve-lt-sysroot.patch

diff --git a/meta/recipes-devtools/libtool/libtool-2.4.2.inc b/meta/recipes-devtools/libtool/libtool-2.4.2.inc
index bb4ddf0..92e4949 100644
--- a/meta/recipes-devtools/libtool/libtool-2.4.2.inc
+++ b/meta/recipes-devtools/libtool/libtool-2.4.2.inc
@@ -20,6 +20,7 @@ SRC_URI = "${GNU_MIRROR}/libtool/libtool-${PV}.tar.gz \
 	   file://respect-fstack-protector.patch \
            file://norm-rpath.patch \
            file://dont-depend-on-help2man.patch \
+           file://fix-resolve-lt-sysroot.patch \
           "
 
 SRC_URI[md5sum] = "d2f3b7d4627e69e13514a40e72a24d50"
diff --git a/meta/recipes-devtools/libtool/libtool/fix-resolve-lt-sysroot.patch b/meta/recipes-devtools/libtool/libtool/fix-resolve-lt-sysroot.patch
new file mode 100644
index 0000000..44e9fe1
--- /dev/null
+++ b/meta/recipes-devtools/libtool/libtool/fix-resolve-lt-sysroot.patch
@@ -0,0 +1,41 @@
+Upstream-Status: Pending
+
+This patch updates libtool.m4 (and its output) to resolve a problem
+with variable 'lt_sysroot' not being properly updated if the option
+'--with[-libtool]-sysroot' is not provided when running the 'configure'
+script for a package.
+
+I have also reported the problem to libtool here
+
+http://lists.gnu.org/archive/html/bug-libtool/2013-09/msg00005.html
+
+Signed-off-by: Hans Beckerus <hans.beckerus at gmail.com>
+---
+diff -ur libtool-2.4.2.orig/libltdl/m4/libtool.m4 libtool-2.4.2/libltdl/m4/libtool.m4
+--- libtool-2.4.2.orig/libltdl/m4/libtool.m4	2013-09-13 22:37:43.647282945 +0200
++++ libtool-2.4.2/libltdl/m4/libtool.m4	2013-09-14 10:27:37.168178605 +0200
+@@ -1234,16 +1234,21 @@
+ dnl in case the user passed a directory name.
+ lt_sysroot=
+ case ${with_libtool_sysroot} in #(
+- yes)
++ no)
+    if test "$GCC" = yes; then
+      lt_sysroot=`$CC --print-sysroot 2>/dev/null`
++     # Treat "/" the same a an unset sysroot. It seems to be more
++     # compatible across host platforms that way!?
++     if test "$lt_sysroot" = /; then
++       lt_sysroot=
++     fi
+    fi
+    ;; #(
++ yes|''|/)
++   ;; #(
+  /*)
+    lt_sysroot=`echo "$with_libtool_sysroot" | sed -e "$sed_quote_subst"`
+    ;; #(
+- no|'')
+-   ;; #(
+  *)
+    AC_MSG_RESULT([${with_libtool_sysroot}])
+    AC_MSG_ERROR([The sysroot must be an absolute path.])
-- 
1.7.9.5