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gdb: fix cygwin check in configure script

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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/
2013-11-27  Steffen Sledz  <sledz@dresearch-fe.de>

	* configure.ac: Tighten Cygwin detection check.
	* configure: Rebuild.
This commit is contained in:
Steffen Sledz 2013-11-27 18:51:49 +00:00 • committed by Pedro Alves
parent 908fa2aaed
commit 92a021debf
3 changed files with 7 additions and 2 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2013-11-27 Steffen Sledz <sledz@dresearch-fe.de>
* configure: Rebuild.
* configure.ac: fix cygwin detection check
2013-11-27 Pedro Alves <palves@redhat.com>
* frame-unwind.c (frame_unwind_got_optimized): Use the type of the

2
gdb/configure vendored
View file

@ -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

2
gdb/configure.ac
View file

@ -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])])