Move gdb_regex* to common/

Later patches need regex support also in gdbserver.

gdb/ChangeLog
2015-07-15  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* Makefile.in (HFILES_NO_SRCDIR): Change gdb_regex.h to
	common/gdb_regex.h.
	(COMMON_OBS): Add gdb_regex.o.
	(gdb_regex.o): New.
	* common/common.m4 (GDB_AC_COMMON): Add gdb_use_included_regex,
	--without-included-regex and USE_INCLUDED_REGEX.
	* common/gdb_regex.c: New file from utils.c functions.
	* common/gdb_regex.h: Move it here from gdb_regex.h, update include
	file wrapping define name.
	* configure: Rebuilt.
	* configure.ac (gdb_use_included_regex, --without-included-regex)
	(USE_INCLUDED_REGEX): Move them to common/common.m4.
	* gdb_regex.h: Move it to common/gdb_regex.h.
	* utils.c: Remove include gdb_regex.h.
	(do_regfree_cleanup, make_regfree_cleanup, get_regcomp_error)
	(compile_rx_or_error): Move them to common/gdb_regex.c.

gdb/gdbserver/ChangeLog
2015-07-15  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* Makefile.in (OBS): Add gdb_regex.o.
	(gdb_regex.o): New.
	* config.in: Rebuilt.
	* configure: Rebuilt.

1 files changed, 56 insertions, 0 deletions

diff --git a/gdb/gdbserver/configure b/gdb/gdbserver/configure
index e8cf136..c7ae6be 100755
--- a/gdb/gdbserver/configure
+++ b/gdb/gdbserver/configure
@@ -694,6 +694,7 @@ enable_maintainer_mode
 enable_largefile
 enable_build_with_cxx
 enable_libmcheck
+with_included_regex
 with_ust
 with_ust_include
 with_ust_lib
@@ -1345,6 +1346,10 @@ Optional Features:
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
+  --without-included-regex
+                          don't use included regex; this is the default on
+                          systems with version 2 of the GNU C library (use
+                          with caution on other system)
   --with-ust=PATH       Specify prefix directory for the installed UST package
                           Equivalent to --with-ust-include=PATH/include
                           plus --with-ust-lib=PATH/lib
@@ -5747,6 +5752,57 @@ $as_echo "#define HAVE_SIGSETJMP 1" >>confdefs.h
 
 fi
 
+  # Assume we'll default to using the included libiberty regex.
+  gdb_use_included_regex=yes
+
+  # However, if the system regex is GNU regex, then default to *not*
+  # using the included regex.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNU regex" >&5
+$as_echo_n "checking for GNU regex... " >&6; }
+if test "${gdb_cv_have_gnu_regex+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <gnu-versions.h>
+int
+main ()
+{
+#define REGEX_INTERFACE_VERSION 1
+  #if _GNU_REGEX_INTERFACE_VERSION != REGEX_INTERFACE_VERSION
+  # error "Version mismatch"
+  #endif
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  gdb_cv_have_gnu_regex=yes
+else
+  gdb_cv_have_gnu_regex=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gdb_cv_have_gnu_regex" >&5
+$as_echo "$gdb_cv_have_gnu_regex" >&6; }
+  if test $gdb_cv_have_gnu_regex = yes; then
+    gdb_use_included_regex=no
+  fi
+
+
+# Check whether --with-included-regex was given.
+if test "${with_included_regex+set}" = set; then :
+  withval=$with_included_regex; gdb_with_regex=$withval
+else
+  gdb_with_regex=$gdb_use_included_regex
+fi
+
+  if test "$gdb_with_regex" = yes; then
+
+$as_echo "#define USE_INCLUDED_REGEX 1" >>confdefs.h
+
+  fi
+
 
 # Check for UST
 ustlibs=""