bfd/

	PR 6768
	* configure.in: Test for ld --as-needed support.  Link shared
	libbfd against libm.
	* configure: Regenerate.
opcodes/
	PR 6768
	* configure.in: Test for ld --as-needed support.  Link shared
	libopcodes against libm.
	* configure: Regenerate.

3 files changed, 275 insertions, 1 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 32a2ab4..817726f 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,10 @@
+2009-03-04  Alan Modra  <amodra@bigpond.net.au>
+
+	PR 6768
+	* configure.in: Test for ld --as-needed support.  Link shared
+	libbfd against libm.
+	* configure: Regenerate.
+
 2009-03-03  Alan Modra  <amodra@bigpond.net.au>
 
 	* Makefile.am: Run "make dep-am".
diff --git a/bfd/configure b/bfd/configure
index 6c21291..adcd52d 100755
--- a/bfd/configure
+++ b/bfd/configure
@@ -458,7 +458,7 @@ ac_includes_default="\
 # include <unistd.h>
 #endif"
 
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CYGPATH_W PACKAGE VERSION ACLOCAL AUTOCONF AUTOMAKE AUTOHEADER MAKEINFO install_sh STRIP ac_ct_STRIP INSTALL_STRIP_PROGRAM mkdir_p AWK SET_MAKE am__leading_dot AMTAR am__tar am__untar DEPDIR am__include am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH CCDEPMODE am__fastdepCC_TRUE am__fastdepCC_FALSE AR ac_ct_AR RANLIB ac_ct_RANLIB CPP EGREP LIBTOOL SED FGREP GREP LD DUMPBIN ac_ct_DUMPBIN NM LN_S OBJDUMP ac_ct_OBJDUMP lt_ECHO DSYMUTIL ac_ct_DSYMUTIL NMEDIT ac_ct_NMEDIT LIPO ac_ct_LIPO OTOOL ac_ct_OTOOL OTOOL64 ac_ct_OTOOL64 DEBUGDIR PKGVERSION REPORT_BUGS_TO REPORT_BUGS_TEXI WARN_CFLAGS NO_WERROR MAINTAINER_MODE_TRUE MAINTAINER_MODE_FALSE MAINT GENINSRC_NEVER_TRUE GENINSRC_NEVER_FALSE INSTALL_LIBBFD_TRUE INSTALL_LIBBFD_FALSE host_noncanonical target_noncanonical bfdlibdir bfdincludedir USE_NLS LIBINTL LIBINTL_DEP INCINTL XGETTEXT GMSGFMT POSUB CATALOGS DATADIRNAME INSTOBJEXT GENCAT CATOBJEXT MKINSTALLDIRS MSGFMT MSGMERGE HDEFINES BFD_HOST_64BIT_LONG BFD_HOST_64BIT_LONG_LONG BFD_HOST_64_BIT_DEFINED BFD_HOST_64_BIT BFD_HOST_U_64_BIT BFD_HOSTPTR_T CC_FOR_BUILD EXEEXT_FOR_BUILD COREFILE COREFLAG SHARED_LDFLAGS SHARED_LIBADD TDEFINES wordsize bfd64_libs all_backends bfd_backends bfd_machines bfd_default_target_size bfd_file_ptr bfd_ufile_ptr tdefaults datarootdir docdir htmldir pdfdir LIBOBJS LTLIBOBJS'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CYGPATH_W PACKAGE VERSION ACLOCAL AUTOCONF AUTOMAKE AUTOHEADER MAKEINFO install_sh STRIP ac_ct_STRIP INSTALL_STRIP_PROGRAM mkdir_p AWK SET_MAKE am__leading_dot AMTAR am__tar am__untar DEPDIR am__include am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH CCDEPMODE am__fastdepCC_TRUE am__fastdepCC_FALSE AR ac_ct_AR RANLIB ac_ct_RANLIB CPP EGREP LIBTOOL SED FGREP GREP LD DUMPBIN ac_ct_DUMPBIN NM LN_S OBJDUMP ac_ct_OBJDUMP lt_ECHO DSYMUTIL ac_ct_DSYMUTIL NMEDIT ac_ct_NMEDIT LIPO ac_ct_LIPO OTOOL ac_ct_OTOOL OTOOL64 ac_ct_OTOOL64 DEBUGDIR PKGVERSION REPORT_BUGS_TO REPORT_BUGS_TEXI WARN_CFLAGS NO_WERROR MAINTAINER_MODE_TRUE MAINTAINER_MODE_FALSE MAINT GENINSRC_NEVER_TRUE GENINSRC_NEVER_FALSE INSTALL_LIBBFD_TRUE INSTALL_LIBBFD_FALSE host_noncanonical target_noncanonical bfdlibdir bfdincludedir USE_NLS LIBINTL LIBINTL_DEP INCINTL XGETTEXT GMSGFMT POSUB CATALOGS DATADIRNAME INSTOBJEXT GENCAT CATOBJEXT MKINSTALLDIRS MSGFMT MSGMERGE HDEFINES BFD_HOST_64BIT_LONG BFD_HOST_64BIT_LONG_LONG BFD_HOST_64_BIT_DEFINED BFD_HOST_64_BIT BFD_HOST_U_64_BIT BFD_HOSTPTR_T CC_FOR_BUILD EXEEXT_FOR_BUILD COREFILE COREFLAG LIBM SHARED_LDFLAGS SHARED_LIBADD TDEFINES wordsize bfd64_libs all_backends bfd_backends bfd_machines bfd_default_target_size bfd_file_ptr bfd_ufile_ptr tdefaults datarootdir docdir htmldir pdfdir LIBOBJS LTLIBOBJS'
 ac_subst_files=''
 ac_pwd=`pwd`
 
@@ -20555,6 +20555,238 @@ _ACEOF
 
 fi
 
+# Check if linker supports --as-needed and --no-as-needed options
+echo "$as_me:$LINENO: checking linker --as-needed support" >&5
+echo $ECHO_N "checking linker --as-needed support... $ECHO_C" >&6
+if test "${bfd_cv_ld_as_needed+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  bfd_cv_ld_as_needed=no
+	if $LD --help 2>/dev/null | grep as-needed > /dev/null; then
+		bfd_cv_ld_as_needed=yes
+	fi
+
+fi
+echo "$as_me:$LINENO: result: $bfd_cv_ld_as_needed" >&5
+echo "${ECHO_T}$bfd_cv_ld_as_needed" >&6
+
+LIBM=
+case $host in
+*-*-beos* | *-*-cygwin* | *-*-pw32* | *-*-darwin*)
+  # These system don't have libm, or don't need it
+  ;;
+*-ncr-sysv4.3*)
+  echo "$as_me:$LINENO: checking for _mwvalidcheckl in -lmw" >&5
+echo $ECHO_N "checking for _mwvalidcheckl in -lmw... $ECHO_C" >&6
+if test "${ac_cv_lib_mw__mwvalidcheckl+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lmw  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char _mwvalidcheckl ();
+int
+main ()
+{
+_mwvalidcheckl ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  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_c_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_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_mw__mwvalidcheckl=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_mw__mwvalidcheckl=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_mw__mwvalidcheckl" >&5
+echo "${ECHO_T}$ac_cv_lib_mw__mwvalidcheckl" >&6
+if test $ac_cv_lib_mw__mwvalidcheckl = yes; then
+  LIBM="-lmw"
+fi
+
+  echo "$as_me:$LINENO: checking for cos in -lm" >&5
+echo $ECHO_N "checking for cos in -lm... $ECHO_C" >&6
+if test "${ac_cv_lib_m_cos+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char cos ();
+int
+main ()
+{
+cos ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  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_c_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_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_m_cos=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_m_cos=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_m_cos" >&5
+echo "${ECHO_T}$ac_cv_lib_m_cos" >&6
+if test $ac_cv_lib_m_cos = yes; then
+  LIBM="$LIBM -lm"
+fi
+
+  ;;
+*)
+  echo "$as_me:$LINENO: checking for cos in -lm" >&5
+echo $ECHO_N "checking for cos in -lm... $ECHO_C" >&6
+if test "${ac_cv_lib_m_cos+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char cos ();
+int
+main ()
+{
+cos ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  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_c_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_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_m_cos=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_m_cos=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_m_cos" >&5
+echo "${ECHO_T}$ac_cv_lib_m_cos" >&6
+if test $ac_cv_lib_m_cos = yes; then
+  LIBM="-lm"
+fi
+
+  ;;
+esac
+
+
+
 # When building a shared libbfd, link against the pic version of libiberty
 # so that apps that use libbfd won't need libiberty just to satisfy any
 # libbfd references.
@@ -20575,6 +20807,18 @@ if test "$enable_shared" = "yes"; then
     SHARED_LIBADD="-L`pwd`/../libiberty -liberty -L`pwd`/../intl -lintl -lcygwin -lkernel32"
   ;;
   esac
+
+  if test -n "$SHARED_LIBADD"; then
+    if test -n "$LIBM"; then
+      if test x"$bfd_cv_ld_as_needed" = xyes; then
+	# Link against libm only when needed.  Put -lc, -lm inside -Wl
+	# to stop libtool reordering these options.
+	SHARED_LIBADD="$SHARED_LIBADD -Wl,-lc,--as-needed,`echo $LIBM | sed 's/ /,/g'`,--no-as-needed"
+      else
+	SHARED_LIBADD="$SHARED_LIBADD $LIBM"
+      fi
+    fi
+  fi
 fi
 
 
@@ -23256,6 +23500,7 @@ s,@CC_FOR_BUILD@,$CC_FOR_BUILD,;t t
 s,@EXEEXT_FOR_BUILD@,$EXEEXT_FOR_BUILD,;t t
 s,@COREFILE@,$COREFILE,;t t
 s,@COREFLAG@,$COREFLAG,;t t
+s,@LIBM@,$LIBM,;t t
 s,@SHARED_LDFLAGS@,$SHARED_LDFLAGS,;t t
 s,@SHARED_LIBADD@,$SHARED_LIBADD,;t t
 s,@TDEFINES@,$TDEFINES,;t t
diff --git a/bfd/configure.in b/bfd/configure.in
index a56004d..fe780a9 100644
--- a/bfd/configure.in
+++ b/bfd/configure.in
@@ -494,6 +494,16 @@ if test -n "$TRAD_HEADER"; then
     [Name of host specific header file to include in trad-core.c.])
 fi
 
+# Check if linker supports --as-needed and --no-as-needed options
+AC_CACHE_CHECK(linker --as-needed support, bfd_cv_ld_as_needed,
+	[bfd_cv_ld_as_needed=no
+	if $LD --help 2>/dev/null | grep as-needed > /dev/null; then
+		bfd_cv_ld_as_needed=yes
+	fi
+	])
+
+LT_LIB_M
+
 # When building a shared libbfd, link against the pic version of libiberty
 # so that apps that use libbfd won't need libiberty just to satisfy any
 # libbfd references.
@@ -516,6 +526,18 @@ changequote([,])dnl
     SHARED_LIBADD="-L`pwd`/../libiberty -liberty -L`pwd`/../intl -lintl -lcygwin -lkernel32"
   ;;
   esac
+
+  if test -n "$SHARED_LIBADD"; then
+    if test -n "$LIBM"; then
+      if test x"$bfd_cv_ld_as_needed" = xyes; then
+	# Link against libm only when needed.  Put -lc, -lm inside -Wl
+	# to stop libtool reordering these options.
+	SHARED_LIBADD="$SHARED_LIBADD -Wl,-lc,--as-needed,`echo $LIBM | sed 's/ /,/g'`,--no-as-needed"
+      else
+	SHARED_LIBADD="$SHARED_LIBADD $LIBM"
+      fi
+    fi
+  fi
 fi
 AC_SUBST(SHARED_LDFLAGS)
 AC_SUBST(SHARED_LIBADD)