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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