libxcrypt: fix sporadic failures in nativesdk-libxcrypt-compat

(From OE-Core rev: ee1dca4ad342455c800b4ff38f375f5c40cfbdf6)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/libxcrypt/files/0001-configure.ac-do-not-use-compute-symver-floor.patch

@@ -0,0 +1,32 @@
+From b28bb856ccebe8fded51d11362bf5920699eed59 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Thu, 18 Mar 2021 10:52:13 +0000
+Subject: [PATCH] configure.ac: do not use compute-symver-floor
+
+This script (newly introduced in 4.4.18) sporadically fails, without
+failing configure(), which has been reported at
+https://github.com/besser82/libxcrypt/issues/123
+
+Upstream-Status: Inappropriate
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+---
+ configure.ac | 6 +-----
+ 1 file changed, 1 insertion(+), 5 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 45b91b4..f3ba945 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -426,11 +426,7 @@ if test x$enable_shared != xyes; then enable_obsolete_api=0; fi
+ # need to be binary backward compatible with.
+ if test $enable_obsolete_api = 1; then
+   AC_MSG_CHECKING([minimum symbol version to use for compatibility symbols])
+-  SYMVER_FLOOR=$(
+-    $PERL ${srcdir}/build-aux/compute-symver-floor \
+-      ${srcdir}/lib/libcrypt.minver $host_os $host_cpu \
+-    2>&AS_MESSAGE_LOG_FD
+-  )
++  SYMVER_FLOOR=GLIBC_2.0
+   AC_MSG_RESULT([$SYMVER_FLOOR])
+   case "$SYMVER_FLOOR" in
+     ERROR)

meta/recipes-core/libxcrypt/libxcrypt.inc

@@ -9,7 +9,9 @@ LIC_FILES_CHKSUM = "file://LICENSING;md5=bd5d9777dfe7076c4f2928f12fed226a \
 
 inherit autotools pkgconfig
 
-SRC_URI = "git://github.com/besser82/libxcrypt.git;branch=${SRCBRANCH}"
+SRC_URI = "git://github.com/besser82/libxcrypt.git;branch=${SRCBRANCH} \
+           file://0001-configure.ac-do-not-use-compute-symver-floor.patch \
+           "
 SRCREV = "94d84f92ca123d851586016c4678eb1f21c19029"
 SRCBRANCH ?= "develop"