2012-02-21 Tristan Gingold <gingold@adacore.com>

	    Pedro Alves  <palves@redhat.com>

	* ia64-tdep.c: Do not include libunwind-ia64.h.
	* libunwind-frame.h: Remove #ifdef HAVE_LIBUNWIND_H guard.
	Include libunwind-ia64.h instead of libunwind.h.
	* configure.ac (--with-libunwind, $enable_libunwind): Don't check
	for libunwind.h existence.
	* configure, config.in: Regenerate.

7 files changed, 37 insertions, 25 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0b29febbfc..0018193a56 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,13 @@
+2012-02-21  Tristan Gingold  <gingold@adacore.com>
+	    Pedro Alves  <palves@redhat.com>
+
+	* ia64-tdep.c: Do not include libunwind-ia64.h.
+	* libunwind-frame.h: Remove #ifdef HAVE_LIBUNWIND_H guard.
+	Include libunwind-ia64.h instead of libunwind.h.
+	* configure.ac (--with-libunwind, $enable_libunwind): Don't check
+	for libunwind.h existence.
+	* configure, config.in: Regenerate.
+
 2012-02-21  Anton Gorenkov  <xgsa@yandex.ru>
 
 	* c-valprint.c (c_value_print): Use value_rtti_indirect_type
diff --git a/gdb/config.in b/gdb/config.in
index bae17635a3..194cc7d26e 100644
--- a/gdb/config.in
+++ b/gdb/config.in
@@ -242,9 +242,6 @@
 /* Define if libunwind library is being used. */
 #undef HAVE_LIBUNWIND
 
-/* Define to 1 if you have the <libunwind.h> header file. */
-#undef HAVE_LIBUNWIND_H
-
 /* Define to 1 if you have the <libunwind-ia64.h> header file. */
 #undef HAVE_LIBUNWIND_IA64_H
 
diff --git a/gdb/configure b/gdb/configure
index 2566410c10..9cb3742e8c 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -8252,21 +8252,19 @@ if test "${with_libunwind+set}" = set; then :
 esac
 else
 
-  for ac_header in libunwind.h libunwind-ia64.h
+  for ac_header in libunwind-ia64.h
 do :
-  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
-eval as_val=\$$as_ac_Header
-   if test "x$as_val" = x""yes; then :
+  ac_fn_c_check_header_mongrel "$LINENO" "libunwind-ia64.h" "ac_cv_header_libunwind_ia64_h" "$ac_includes_default"
+if test "x$ac_cv_header_libunwind_ia64_h" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+#define HAVE_LIBUNWIND_IA64_H 1
 _ACEOF
 
 fi
 
 done
 
-  if test x"$ac_cv_header_libunwind_h" = xyes -a x"$ac_cv_header_libunwind_ia64_h" = xyes; then
+  if test x"$ac_cv_header_libunwind_ia64_h" = xyes; then
     enable_libunwind=yes;
   fi
 
@@ -8274,14 +8272,12 @@ fi
 
 
 if test x"$enable_libunwind" = xyes; then
-  for ac_header in libunwind.h libunwind-ia64.h
+  for ac_header in libunwind-ia64.h
 do :
-  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
-eval as_val=\$$as_ac_Header
-   if test "x$as_val" = x""yes; then :
+  ac_fn_c_check_header_mongrel "$LINENO" "libunwind-ia64.h" "ac_cv_header_libunwind_ia64_h" "$ac_includes_default"
+if test "x$ac_cv_header_libunwind_ia64_h" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+#define HAVE_LIBUNWIND_IA64_H 1
 _ACEOF
 
 fi
diff --git a/gdb/configure.ac b/gdb/configure.ac
index 1b11adb066..c4c84a0807 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -348,14 +348,14 @@ AS_HELP_STRING([--with-libunwind], [use libunwind frame unwinding support]),
   no)   enable_libunwind=no ;;
   *)    AC_MSG_ERROR(bad value ${withval} for GDB with-libunwind option) ;;
 esac],[
-  AC_CHECK_HEADERS(libunwind.h libunwind-ia64.h)
-  if test x"$ac_cv_header_libunwind_h" = xyes -a x"$ac_cv_header_libunwind_ia64_h" = xyes; then
+  AC_CHECK_HEADERS(libunwind-ia64.h)
+  if test x"$ac_cv_header_libunwind_ia64_h" = xyes; then
     enable_libunwind=yes;
   fi
 ])
    
 if test x"$enable_libunwind" = xyes; then
-  AC_CHECK_HEADERS(libunwind.h libunwind-ia64.h)
+  AC_CHECK_HEADERS(libunwind-ia64.h)
   AC_DEFINE(HAVE_LIBUNWIND, 1, [Define if libunwind library is being used.])
   CONFIG_OBS="$CONFIG_OBS libunwind-frame.o"
   CONFIG_DEPS="$CONFIG_DEPS libunwind-frame.o"
diff --git a/gdb/ia64-tdep.c b/gdb/ia64-tdep.c
index a297eccf39..a36dc223af 100644
--- a/gdb/ia64-tdep.c
+++ b/gdb/ia64-tdep.c
@@ -43,7 +43,6 @@
 #ifdef HAVE_LIBUNWIND_IA64_H
 #include "elf/ia64.h"           /* for PT_IA_64_UNWIND value */
 #include "libunwind-frame.h"
-#include "libunwind-ia64.h"
 
 /* Note: KERNEL_START is supposed to be an address which is not going
          to ever contain any valid unwind info.  For ia64 linux, the choice
diff --git a/gdb/libunwind-frame.c b/gdb/libunwind-frame.c
index 893fe1ee02..f8f5289fe9 100644
--- a/gdb/libunwind-frame.c
+++ b/gdb/libunwind-frame.c
@@ -40,6 +40,14 @@
 
 #include "complaints.h"
 
+/* IA-64 is the only target that currently uses libunwind-frame.  Note
+   how UNW_TARGET, UNW_OBJ, etc. are compile time constants below.
+   Those come from libunwind's headers, and are target dependent.
+   Also, some of libunwind's typedefs are target dependent, as e.g.,
+   unw_word_t.  If some other target wants to use this, we will need
+   to do some abstracting in order to make it possible to select which
+   libunwind we're talking to at runtime (and have one per arch).  */
+
 /* The following two macros are normally defined in <endian.h>.
    But systems such as ia64-hpux do not provide such header, so
    we just define them here if not already defined.  */
diff --git a/gdb/libunwind-frame.h b/gdb/libunwind-frame.h
index 0251819058..ef98177008 100644
--- a/gdb/libunwind-frame.h
+++ b/gdb/libunwind-frame.h
@@ -19,8 +19,6 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-#ifdef HAVE_LIBUNWIND_H
-
 struct frame_info;
 struct frame_id;
 struct regcache;
@@ -29,7 +27,13 @@ struct gdbarch;
 #ifndef LIBUNWIND_FRAME_H
 #define LIBUNWIND_FRAME_H 1
 
-#include "libunwind.h"
+/* IA-64 is the only target that currently uses libunwind.  If some
+   other target wants to use it, we will need to do some abstracting
+   in order to make it possible to have more than one libunwind-frame
+   instance.  Including "libunwind.h" is wrong as that ends up
+   including the libunwind-$(arch).h for the host gdb is running
+   on.  */
+#include "libunwind-ia64.h"
 
 struct libunwind_descr
 {
@@ -72,5 +76,3 @@ int libunwind_get_reg_special (struct gdbarch *gdbarch,
 			       int regnum, void *buf);
 
 #endif /* libunwind-frame.h */
-
-#endif /* HAVE_LIBUNWIND_H  */