gdb-7.6: fix cygwin check in configure script

This is a fix which avoids false positives if the search pattern
"lose" is found in path descriptions in comments generated by the
preprocessor we hit in our development environment.

[gdb Bug #16152] -- https://sourceware.org/bugzilla/show_bug.cgi?id=16152

Upstream-Status: Accepted
(From OE-Core rev: 7e2dbda690b480ab05d14353cb038749ce23d58c)

Signed-off-by: Steffen Sledz <sledz@dresearch-fe.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/gdb/gdb-7.6.inc

@@ -4,6 +4,8 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=59530bdf33659b29e73d4adb9f9f6552 \
 		    file://COPYING3.LIB;md5=6a6a8e020838b23406c81b19c1d46df6 \
 		    file://COPYING.LIB;md5=9f604d8a4f8e74f4f5140845a21b6674"
 
+SRC_URI += " file://gdb-fix-cygwin-check-in-configure-script.patch "
+
 S = "${WORKDIR}/${BPN}-${PV}"
 
 SRC_URI[md5sum] = "a9836707337e5f7bf76a009a8904f470"

meta/recipes-devtools/gdb/gdb/gdb-fix-cygwin-check-in-configure-script.patch

@@ -0,0 +1,38 @@
+Avoid false positives if the search pattern "lose" is found in path
+descriptions in comments generated by the preprocessor.
+
+See <https://sourceware.org/bugzilla/show_bug.cgi?id=16152>.
+---
+ gdb/configure    | 2 +-
+ gdb/configure.ac | 2 +-
+ 3 files changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/gdb/configure b/gdb/configure
+index 5514b2f..b38e183 100755
+--- a/gdb/configure
++++ b/gdb/configure
+@@ -12446,7 +12446,7 @@ lose
+ #endif
+ _ACEOF
+ if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+-  $EGREP "lose" >/dev/null 2>&1; then :
++  $EGREP "^lose$" >/dev/null 2>&1; then :
+   gdb_cv_os_cygwin=yes
+ else
+   gdb_cv_os_cygwin=no
+diff --git a/gdb/configure.ac b/gdb/configure.ac
+index 9b73887..2947293 100644
+--- a/gdb/configure.ac
++++ b/gdb/configure.ac
+@@ -1877,7 +1877,7 @@ AC_SUBST(WERROR_CFLAGS)
+ 
+ # In the Cygwin environment, we need some additional flags.
+ AC_CACHE_CHECK([for cygwin], gdb_cv_os_cygwin,
+-[AC_EGREP_CPP(lose, [
++[AC_EGREP_CPP(^lose$, [
+ #if defined (__CYGWIN__) || defined (__CYGWIN32__)
+ lose
+ #endif],[gdb_cv_os_cygwin=yes],[gdb_cv_os_cygwin=no])])
+-- 
+1.8.4
+