aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--elfcpp/ChangeLog7
-rw-r--r--elfcpp/elfcpp_swap.h58
-rw-r--r--gold/ChangeLog6
-rw-r--r--gold/config.in3
-rwxr-xr-xgold/configure150
-rw-r--r--gold/configure.ac1
6 files changed, 222 insertions, 3 deletions
diff --git a/elfcpp/ChangeLog b/elfcpp/ChangeLog
index c4bd716..5674d15 100644
--- a/elfcpp/ChangeLog
+++ b/elfcpp/ChangeLog
@@ -1,3 +1,10 @@
+2009-03-01 Ian Lance Taylor <iant@google.com>
+
+ * elfcpp_swap.h: #include "config.h". Only #include <byteswap.h>
+ if HAVE_BYTESWAP_H is defined; if not, provide definitions for
+ bswap_{16,32,64}. For gcc 4.3 and later, use the builtin bswap
+ functions. Check WORDS_BIGENDIAN rather than __BYTE_ORDER.
+
2009-01-06 H.J. Lu <hongjiu.lu@intel.com>
* elfcpp.h (enum STT): Remove STT_IFUNC.
diff --git a/elfcpp/elfcpp_swap.h b/elfcpp/elfcpp_swap.h
index 9f445dc..0685276 100644
--- a/elfcpp/elfcpp_swap.h
+++ b/elfcpp/elfcpp_swap.h
@@ -1,6 +1,6 @@
// elfcpp_swap.h -- Handle swapping for elfcpp -*- C++ -*-
-// Copyright 2006, 2007, Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of elfcpp.
@@ -37,8 +37,54 @@
#define ELFCPP_SWAP_H
#include <stdint.h>
-#include <endian.h>
+
+// We need an autoconf-generated config.h file for endianness and
+// swapping. We check two macros: WORDS_BIGENDIAN and
+// HAVE_BYTESWAP_H.
+
+#include "config.h"
+
+#ifdef HAVE_BYTESWAP_H
#include <byteswap.h>
+#else
+// Provide our own versions of the byteswap functions.
+inline uint16_t
+bswap_16(uint16_t v)
+{
+ return ((v >> 8) & 0xff) | ((v & 0xff) << 8);
+}
+
+inline uint32_t
+bswap_32(uint32_t v)
+{
+ return ( ((v & 0xff000000) >> 24)
+ | ((v & 0x00ff0000) >> 8)
+ | ((v & 0x0000ff00) << 8)
+ | ((v & 0x000000ff) << 24));
+}
+
+inline uint64_t
+bswap_64(uint64_t v)
+{
+ return ( ((v & 0xff00000000000000ULL) >> 56)
+ | ((v & 0x00ff000000000000ULL) >> 40)
+ | ((v & 0x0000ff0000000000ULL) >> 24)
+ | ((v & 0x000000ff00000000ULL) >> 8)
+ | ((v & 0x00000000ff000000ULL) << 8)
+ | ((v & 0x0000000000ff0000ULL) << 24)
+ | ((v & 0x000000000000ff00ULL) << 40)
+ | ((v & 0x00000000000000ffULL) << 56));
+}
+#endif // !defined(HAVE_BYTESWAP_H)
+
+// gcc 4.3 and later provides __builtin_bswap32 and __builtin_bswap64.
+
+#if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
+#undef bswap_32
+#define bswap_32 __builtin_bswap32
+#undef bswap_64
+#define bswap_64 __builtin_bswap64
+#endif
namespace elfcpp
{
@@ -49,7 +95,13 @@ struct Endian
{
public:
// Used for template specializations.
- static const bool host_big_endian = __BYTE_ORDER == __BIG_ENDIAN;
+ static const bool host_big_endian =
+#ifdef WORDS_BIGENDIAN
+ true
+#else
+ false
+#endif
+ ;
};
// Valtype_base is a template based on size (8, 16, 32, 64) which
diff --git a/gold/ChangeLog b/gold/ChangeLog
index cbd3d4b..e351dba 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,3 +1,9 @@
+2009-03-01 Ian Lance Taylor <iant@google.com>
+
+ * configure.ac: Check for byteswap.h.
+ * configure: Rebuild.
+ * config.in: Rebuild.
+
2009-03-01 Mikolaj Zalewski <mikolajz@google.com>
* layout.cc (Layout::find_or_add_kept_section): New function.
diff --git a/gold/config.in b/gold/config.in
index 309f84b6..01aac90 100644
--- a/gold/config.in
+++ b/gold/config.in
@@ -19,6 +19,9 @@
/* Default size (32 or 64) */
#undef GOLD_DEFAULT_SIZE
+/* Define to 1 if you have the <byteswap.h> header file. */
+#undef HAVE_BYTESWAP_H
+
/* Define to 1 if you have the <ext/hash_map> header file. */
#undef HAVE_EXT_HASH_MAP
diff --git a/gold/configure b/gold/configure
index 140c562..50ebad4 100755
--- a/gold/configure
+++ b/gold/configure
@@ -6490,6 +6490,156 @@ fi
done
+for ac_header in byteswap.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+ echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+else
+ # Is the header compilable?
+echo "$as_me:$LINENO: checking $ac_header usability" >&5
+echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+$ac_includes_default
+#include <$ac_header>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>conftest.er1
+ ac_status=$?
+ grep -v '^ *+' conftest.er1 >conftest.err
+ rm -f conftest.er1
+ cat conftest.err >&5
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -z "$ac_cxx_werror_flag"
+ || test ! -s conftest.err'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ ac_header_compiler=yes
+else
+ echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_header_compiler=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6
+
+# Is the header present?
+echo "$as_me:$LINENO: checking $ac_header presence" >&5
+echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+#include <$ac_header>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+ (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+ ac_status=$?
+ grep -v '^ *+' conftest.er1 >conftest.err
+ rm -f conftest.er1
+ cat conftest.err >&5
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } >/dev/null; then
+ if test -s conftest.err; then
+ ac_cpp_err=$ac_cxx_preproc_warn_flag
+ ac_cpp_err=$ac_cpp_err$ac_cxx_werror_flag
+ else
+ ac_cpp_err=
+ fi
+else
+ ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+ ac_header_preproc=yes
+else
+ echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ ac_header_preproc=no
+fi
+rm -f conftest.err conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6
+
+# So? What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_cxx_preproc_warn_flag in
+ yes:no: )
+ { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
+ { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;}
+ ac_header_preproc=yes
+ ;;
+ no:yes:* )
+ { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
+echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
+ { echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;}
+ { echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5
+echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;}
+ { echo "$as_me:$LINENO: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&5
+echo "$as_me: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&2;}
+ { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
+ { echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5
+echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;}
+ (
+ cat <<\_ASBOX
+## ------------------------------- ##
+## Report this to the gold lists. ##
+## ------------------------------- ##
+_ASBOX
+ ) |
+ sed "s/^/$as_me: WARNING: /" >&2
+ ;;
+esac
+echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ eval "$as_ac_Header=\$ac_header_preproc"
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+
+fi
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+ cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
for ac_func in mallinfo
do
as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
diff --git a/gold/configure.ac b/gold/configure.ac
index e19161c..c26c05d 100644
--- a/gold/configure.ac
+++ b/gold/configure.ac
@@ -317,6 +317,7 @@ AC_LANG_PUSH(C++)
AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
+AC_CHECK_HEADERS(byteswap.h)
AC_CHECK_FUNCS(mallinfo)
# gcc 4.3.0 doesn't recognize the printf attribute on a template