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[PATCH] move the computation of C++ warning flags to bfd/warning.m4


From: Trevor Saunders <tbsaunde+binutils@tbsaunde.org>

Hi,

There isn't anything specific to gold about this code, so it would seem to make
sense to compute C and C++ warning flags in the same place.  This also means
that anything else that wants C++ warning flags won't have to roll there own.
The only real difference between the C and C++ flags other than getting rid of
flags that don't make sense, and so don't exist in C++ is removing -Wshadow
because currently the bfd headers aren't compatable with it.

I tested this produces the same set of warning flags for gold/ as before, ok?

Trev

gprof/ChangeLog:

2016-04-03  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* configure: Regenerate.

opcodes/ChangeLog:

2016-04-03  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* configure: Regenerate.

gas/ChangeLog:

2016-04-03  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* configure: Regenerate.

bfd/ChangeLog:

2016-04-03  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* configure: Regenerate.
	* warning.m4: Compute C++ warning flags as well as flags for C.

gold/ChangeLog:

2016-04-03  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* configure: Regenerate.
	* configure.ac: Stop computing C++ warning flags.

binutils/ChangeLog:

2016-04-03  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* configure: Regenerate.

ld/ChangeLog:

2016-04-03  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* configure: Regenerate.
---
 bfd/configure      | 28 ++++++++++++++++++++++++----
 bfd/warning.m4     | 17 +++++++++++++----
 binutils/configure | 28 ++++++++++++++++++++++++----
 gas/configure      | 28 ++++++++++++++++++++++++----
 gold/configure     | 30 ++++++++++++++++++++++++------
 gold/configure.ac  |  3 ---
 gprof/configure    | 28 ++++++++++++++++++++++++----
 ld/configure       | 28 ++++++++++++++++++++++++----
 opcodes/configure  | 28 ++++++++++++++++++++++++----
 9 files changed, 181 insertions(+), 37 deletions(-)

diff --git a/bfd/configure b/bfd/configure
index 51581ba..138eddb 100755
--- a/bfd/configure
+++ b/bfd/configure
@@ -659,6 +659,7 @@ MAINTAINER_MODE_FALSE
 MAINTAINER_MODE_TRUE
 WARN_WRITE_STRINGS
 NO_WERROR
+WARN_CXXFLAGS
 WARN_CFLAGS
 REPORT_BUGS_TEXI
 REPORT_BUGS_TO
@@ -12226,6 +12227,7 @@ fi
 
 # Default set of GCC warnings to enable.
 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+GCC_WARN_CXXFLAGS="-W -Wall"
 
 # Add -Wshadow if the compiler is a sufficiently recent version of GCC.
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -12254,6 +12256,18 @@ else
 fi
 rm -f conftest*
 
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+__GNUC__
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "^[0-4]$" >/dev/null 2>&1; then :
+
+else
+  GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wstack-usage=262144"
+fi
+rm -f conftest*
+
 
 # Set WARN_WRITE_STRINGS if the compiler supports -Wwrite-strings.
 WARN_WRITE_STRINGS=""
@@ -12285,6 +12299,7 @@ case "${host}" in
   *-*-mingw32*)
     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
       GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format"
+      GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wno-format"
     fi
     ;;
   *) ;;
@@ -12298,31 +12313,36 @@ fi
 NO_WERROR=
 if test "${ERROR_ON_WARNING}" = yes ; then
     GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
+    GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Werror"
     NO_WERROR="-Wno-error"
 fi
 
 if test "${GCC}" = yes ; then
   WARN_CFLAGS="${GCC_WARN_CFLAGS}"
+  WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}"
 fi
 
 # Check whether --enable-build-warnings was given.
 if test "${enable_build_warnings+set}" = set; then :
   enableval=$enable_build_warnings; case "${enableval}" in
-  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}";;
+  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}";;
   no)	if test "${GCC}" = yes ; then
 	  WARN_CFLAGS="-w"
+	  WARN_CXXFLAGS="-w"
 	fi;;
   ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
         WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}";;
   *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}";;
-  *)    WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;;
+        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${t} ${GCC_WARN_CXXFLAGS}";;
+  *)    t=`echo "${enableval}" | sed -e "s/,/ /g"`
+    WARN_CFLAGS="${t}" WARN_CXXFLAGS="${t}";;
 esac
 fi
 
 
 if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
-  echo "Setting warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C++ warning flags = $WARN_CXXFLAGS" 6>&1
 fi
 
 
diff --git a/bfd/warning.m4 b/bfd/warning.m4
index 4c5b55d..88b38a1 100644
--- a/bfd/warning.m4
+++ b/bfd/warning.m4
@@ -23,12 +23,14 @@ AC_DEFUN([AM_BINUTILS_WARNINGS],[
 
 # Default set of GCC warnings to enable.
 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+GCC_WARN_CXXFLAGS="-W -Wall"
 
 # Add -Wshadow if the compiler is a sufficiently recent version of GCC.
 AC_EGREP_CPP([^[0-3]$],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wshadow")
 
 # Add -Wstack-usage if the compiler is a sufficiently recent version of GCC.
 AC_EGREP_CPP([^[0-4]$],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wstack-usage=262144")
+AC_EGREP_CPP([^[0-4]$],[__GNUC__],,GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wstack-usage=262144")
 
 # Set WARN_WRITE_STRINGS if the compiler supports -Wwrite-strings.
 WARN_WRITE_STRINGS=""
@@ -47,6 +49,7 @@ case "${host}" in
   *-*-mingw32*)
     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
       GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format"
+      GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wno-format"
     fi
     ;;
   *) ;;
@@ -60,32 +63,38 @@ fi
 NO_WERROR=
 if test "${ERROR_ON_WARNING}" = yes ; then
     GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
+    GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Werror"
     NO_WERROR="-Wno-error"
 fi
 
 if test "${GCC}" = yes ; then
   WARN_CFLAGS="${GCC_WARN_CFLAGS}"
+  WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}"
 fi
 
 AC_ARG_ENABLE(build-warnings,
 [  --enable-build-warnings enable build-time compiler warnings],
 [case "${enableval}" in
-  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}";;
+  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}";;
   no)	if test "${GCC}" = yes ; then
 	  WARN_CFLAGS="-w"
+	  WARN_CXXFLAGS="-w"
 	fi;;
   ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
         WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}";;
   *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}";;
-  *)    WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;;
+        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${t} ${GCC_WARN_CXXFLAGS}";;
+  *)    t=`echo "${enableval}" | sed -e "s/,/ /g"`
+    WARN_CFLAGS="${t}" WARN_CXXFLAGS="${t}";;
 esac])
 
 if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
-  echo "Setting warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C++ warning flags = $WARN_CXXFLAGS" 6>&1
 fi
 
 AC_SUBST(WARN_CFLAGS)
+AC_SUBST(WARN_CXXFLAGS)
 AC_SUBST(NO_WERROR)
      AC_SUBST(WARN_WRITE_STRINGS)
 ])
diff --git a/binutils/configure b/binutils/configure
index 0e88476..b9edea6 100755
--- a/binutils/configure
+++ b/binutils/configure
@@ -652,6 +652,7 @@ YFLAGS
 YACC
 WARN_WRITE_STRINGS
 NO_WERROR
+WARN_CXXFLAGS
 WARN_CFLAGS
 OTOOL64
 OTOOL
@@ -11944,6 +11945,7 @@ _ACEOF
 
 # Default set of GCC warnings to enable.
 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+GCC_WARN_CXXFLAGS="-W -Wall"
 
 # Add -Wshadow if the compiler is a sufficiently recent version of GCC.
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -11972,6 +11974,18 @@ else
 fi
 rm -f conftest*
 
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+__GNUC__
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "^[0-4]$" >/dev/null 2>&1; then :
+
+else
+  GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wstack-usage=262144"
+fi
+rm -f conftest*
+
 
 # Set WARN_WRITE_STRINGS if the compiler supports -Wwrite-strings.
 WARN_WRITE_STRINGS=""
@@ -12003,6 +12017,7 @@ case "${host}" in
   *-*-mingw32*)
     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
       GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format"
+      GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wno-format"
     fi
     ;;
   *) ;;
@@ -12016,31 +12031,36 @@ fi
 NO_WERROR=
 if test "${ERROR_ON_WARNING}" = yes ; then
     GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
+    GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Werror"
     NO_WERROR="-Wno-error"
 fi
 
 if test "${GCC}" = yes ; then
   WARN_CFLAGS="${GCC_WARN_CFLAGS}"
+  WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}"
 fi
 
 # Check whether --enable-build-warnings was given.
 if test "${enable_build_warnings+set}" = set; then :
   enableval=$enable_build_warnings; case "${enableval}" in
-  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}";;
+  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}";;
   no)	if test "${GCC}" = yes ; then
 	  WARN_CFLAGS="-w"
+	  WARN_CXXFLAGS="-w"
 	fi;;
   ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
         WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}";;
   *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}";;
-  *)    WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;;
+        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${t} ${GCC_WARN_CXXFLAGS}";;
+  *)    t=`echo "${enableval}" | sed -e "s/,/ /g"`
+    WARN_CFLAGS="${t}" WARN_CXXFLAGS="${t}";;
 esac
 fi
 
 
 if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
-  echo "Setting warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C++ warning flags = $WARN_CXXFLAGS" 6>&1
 fi
 
 
diff --git a/gas/configure b/gas/configure
index 131dd2d..eef64fc 100755
--- a/gas/configure
+++ b/gas/configure
@@ -642,6 +642,7 @@ cgen_cpu_prefix
 GDBINIT
 WARN_WRITE_STRINGS
 NO_WERROR
+WARN_CXXFLAGS
 WARN_CFLAGS
 OTOOL64
 OTOOL
@@ -11717,6 +11718,7 @@ using_cgen=no
 
 # Default set of GCC warnings to enable.
 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+GCC_WARN_CXXFLAGS="-W -Wall"
 
 # Add -Wshadow if the compiler is a sufficiently recent version of GCC.
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -11745,6 +11747,18 @@ else
 fi
 rm -f conftest*
 
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+__GNUC__
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "^[0-4]$" >/dev/null 2>&1; then :
+
+else
+  GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wstack-usage=262144"
+fi
+rm -f conftest*
+
 
 # Set WARN_WRITE_STRINGS if the compiler supports -Wwrite-strings.
 WARN_WRITE_STRINGS=""
@@ -11776,6 +11790,7 @@ case "${host}" in
   *-*-mingw32*)
     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
       GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format"
+      GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wno-format"
     fi
     ;;
   *) ;;
@@ -11789,31 +11804,36 @@ fi
 NO_WERROR=
 if test "${ERROR_ON_WARNING}" = yes ; then
     GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
+    GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Werror"
     NO_WERROR="-Wno-error"
 fi
 
 if test "${GCC}" = yes ; then
   WARN_CFLAGS="${GCC_WARN_CFLAGS}"
+  WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}"
 fi
 
 # Check whether --enable-build-warnings was given.
 if test "${enable_build_warnings+set}" = set; then :
   enableval=$enable_build_warnings; case "${enableval}" in
-  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}";;
+  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}";;
   no)	if test "${GCC}" = yes ; then
 	  WARN_CFLAGS="-w"
+	  WARN_CXXFLAGS="-w"
 	fi;;
   ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
         WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}";;
   *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}";;
-  *)    WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;;
+        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${t} ${GCC_WARN_CXXFLAGS}";;
+  *)    t=`echo "${enableval}" | sed -e "s/,/ /g"`
+    WARN_CFLAGS="${t}" WARN_CXXFLAGS="${t}";;
 esac
 fi
 
 
 if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
-  echo "Setting warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C++ warning flags = $WARN_CXXFLAGS" 6>&1
 fi
 
 
diff --git a/gold/configure b/gold/configure
index d0cfc95..68e80c7 100755
--- a/gold/configure
+++ b/gold/configure
@@ -609,6 +609,7 @@ GOLD_LDFLAGS
 WARN_CXXFLAGS
 WARN_WRITE_STRINGS
 NO_WERROR
+WARN_CXXFLAGS
 WARN_CFLAGS
 IFUNC_STATIC_FALSE
 IFUNC_STATIC_TRUE
@@ -6690,6 +6691,7 @@ fi
 
 # Default set of GCC warnings to enable.
 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+GCC_WARN_CXXFLAGS="-W -Wall"
 
 # Add -Wshadow if the compiler is a sufficiently recent version of GCC.
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -6718,6 +6720,18 @@ else
 fi
 rm -f conftest*
 
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+__GNUC__
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "^[0-4]$" >/dev/null 2>&1; then :
+
+else
+  GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wstack-usage=262144"
+fi
+rm -f conftest*
+
 
 # Set WARN_WRITE_STRINGS if the compiler supports -Wwrite-strings.
 WARN_WRITE_STRINGS=""
@@ -6749,6 +6763,7 @@ case "${host}" in
   *-*-mingw32*)
     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
       GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format"
+      GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wno-format"
     fi
     ;;
   *) ;;
@@ -6762,31 +6777,36 @@ fi
 NO_WERROR=
 if test "${ERROR_ON_WARNING}" = yes ; then
     GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
+    GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Werror"
     NO_WERROR="-Wno-error"
 fi
 
 if test "${GCC}" = yes ; then
   WARN_CFLAGS="${GCC_WARN_CFLAGS}"
+  WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}"
 fi
 
 # Check whether --enable-build-warnings was given.
 if test "${enable_build_warnings+set}" = set; then :
   enableval=$enable_build_warnings; case "${enableval}" in
-  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}";;
+  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}";;
   no)	if test "${GCC}" = yes ; then
 	  WARN_CFLAGS="-w"
+	  WARN_CXXFLAGS="-w"
 	fi;;
   ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
         WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}";;
   *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}";;
-  *)    WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;;
+        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${t} ${GCC_WARN_CXXFLAGS}";;
+  *)    t=`echo "${enableval}" | sed -e "s/,/ /g"`
+    WARN_CFLAGS="${t}" WARN_CXXFLAGS="${t}";;
 esac
 fi
 
 
 if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
-  echo "Setting warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C++ warning flags = $WARN_CXXFLAGS" 6>&1
 fi
 
 
@@ -6794,8 +6814,6 @@ fi
 
 
 
-WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
-
 
 
 # Check whether --with-gold-ldflags was given.
diff --git a/gold/configure.ac b/gold/configure.ac
index 695a2fd..a65f352 100644
--- a/gold/configure.ac
+++ b/gold/configure.ac
@@ -483,9 +483,6 @@ AM_CONDITIONAL(IFUNC_STATIC, test "$gold_cv_lib_glibc_ifunc" = "both")
 
 AM_BINUTILS_WARNINGS
 
-WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
-AC_SUBST(WARN_CXXFLAGS)
-
 AC_ARG_WITH(gold-ldflags,
 [  --with-gold-ldflags=FLAGS  additional link flags for gold],
 [if test "$withval" = "no" -o "$withval" = "yes"; then
diff --git a/gprof/configure b/gprof/configure
index 5b8fbd7..ab66159 100755
--- a/gprof/configure
+++ b/gprof/configure
@@ -604,6 +604,7 @@ LTLIBOBJS
 LIBOBJS
 WARN_WRITE_STRINGS
 NO_WERROR
+WARN_CXXFLAGS
 WARN_CFLAGS
 GENINSRC_NEVER_FALSE
 GENINSRC_NEVER_TRUE
@@ -12100,6 +12101,7 @@ fi
 
 # Default set of GCC warnings to enable.
 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+GCC_WARN_CXXFLAGS="-W -Wall"
 
 # Add -Wshadow if the compiler is a sufficiently recent version of GCC.
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -12128,6 +12130,18 @@ else
 fi
 rm -f conftest*
 
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+__GNUC__
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "^[0-4]$" >/dev/null 2>&1; then :
+
+else
+  GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wstack-usage=262144"
+fi
+rm -f conftest*
+
 
 # Set WARN_WRITE_STRINGS if the compiler supports -Wwrite-strings.
 WARN_WRITE_STRINGS=""
@@ -12159,6 +12173,7 @@ case "${host}" in
   *-*-mingw32*)
     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
       GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format"
+      GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wno-format"
     fi
     ;;
   *) ;;
@@ -12172,31 +12187,36 @@ fi
 NO_WERROR=
 if test "${ERROR_ON_WARNING}" = yes ; then
     GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
+    GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Werror"
     NO_WERROR="-Wno-error"
 fi
 
 if test "${GCC}" = yes ; then
   WARN_CFLAGS="${GCC_WARN_CFLAGS}"
+  WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}"
 fi
 
 # Check whether --enable-build-warnings was given.
 if test "${enable_build_warnings+set}" = set; then :
   enableval=$enable_build_warnings; case "${enableval}" in
-  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}";;
+  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}";;
   no)	if test "${GCC}" = yes ; then
 	  WARN_CFLAGS="-w"
+	  WARN_CXXFLAGS="-w"
 	fi;;
   ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
         WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}";;
   *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}";;
-  *)    WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;;
+        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${t} ${GCC_WARN_CXXFLAGS}";;
+  *)    t=`echo "${enableval}" | sed -e "s/,/ /g"`
+    WARN_CFLAGS="${t}" WARN_CXXFLAGS="${t}";;
 esac
 fi
 
 
 if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
-  echo "Setting warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C++ warning flags = $WARN_CXXFLAGS" 6>&1
 fi
 
 
diff --git a/ld/configure b/ld/configure
index 24f9316..126f49e 100755
--- a/ld/configure
+++ b/ld/configure
@@ -646,6 +646,7 @@ LIBINTL
 USE_NLS
 WARN_WRITE_STRINGS
 NO_WERROR
+WARN_CXXFLAGS
 WARN_CFLAGS
 installed_linker
 install_as_default
@@ -15543,6 +15544,7 @@ fi
 
 # Default set of GCC warnings to enable.
 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+GCC_WARN_CXXFLAGS="-W -Wall"
 
 # Add -Wshadow if the compiler is a sufficiently recent version of GCC.
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -15571,6 +15573,18 @@ else
 fi
 rm -f conftest*
 
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+__GNUC__
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "^[0-4]$" >/dev/null 2>&1; then :
+
+else
+  GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wstack-usage=262144"
+fi
+rm -f conftest*
+
 
 # Set WARN_WRITE_STRINGS if the compiler supports -Wwrite-strings.
 WARN_WRITE_STRINGS=""
@@ -15602,6 +15616,7 @@ case "${host}" in
   *-*-mingw32*)
     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
       GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format"
+      GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wno-format"
     fi
     ;;
   *) ;;
@@ -15615,31 +15630,36 @@ fi
 NO_WERROR=
 if test "${ERROR_ON_WARNING}" = yes ; then
     GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
+    GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Werror"
     NO_WERROR="-Wno-error"
 fi
 
 if test "${GCC}" = yes ; then
   WARN_CFLAGS="${GCC_WARN_CFLAGS}"
+  WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}"
 fi
 
 # Check whether --enable-build-warnings was given.
 if test "${enable_build_warnings+set}" = set; then :
   enableval=$enable_build_warnings; case "${enableval}" in
-  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}";;
+  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}";;
   no)	if test "${GCC}" = yes ; then
 	  WARN_CFLAGS="-w"
+	  WARN_CXXFLAGS="-w"
 	fi;;
   ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
         WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}";;
   *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}";;
-  *)    WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;;
+        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${t} ${GCC_WARN_CXXFLAGS}";;
+  *)    t=`echo "${enableval}" | sed -e "s/,/ /g"`
+    WARN_CFLAGS="${t}" WARN_CXXFLAGS="${t}";;
 esac
 fi
 
 
 if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
-  echo "Setting warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C++ warning flags = $WARN_CXXFLAGS" 6>&1
 fi
 
 
diff --git a/opcodes/configure b/opcodes/configure
index 747c939..acfd98b 100755
--- a/opcodes/configure
+++ b/opcodes/configure
@@ -643,6 +643,7 @@ MAINTAINER_MODE_TRUE
 NO_WMISSING_FIELD_INITIALIZERS
 WARN_WRITE_STRINGS
 NO_WERROR
+WARN_CXXFLAGS
 WARN_CFLAGS
 OTOOL64
 OTOOL
@@ -11507,6 +11508,7 @@ fi
 
 # Default set of GCC warnings to enable.
 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+GCC_WARN_CXXFLAGS="-W -Wall"
 
 # Add -Wshadow if the compiler is a sufficiently recent version of GCC.
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -11535,6 +11537,18 @@ else
 fi
 rm -f conftest*
 
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+__GNUC__
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "^[0-4]$" >/dev/null 2>&1; then :
+
+else
+  GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wstack-usage=262144"
+fi
+rm -f conftest*
+
 
 # Set WARN_WRITE_STRINGS if the compiler supports -Wwrite-strings.
 WARN_WRITE_STRINGS=""
@@ -11566,6 +11580,7 @@ case "${host}" in
   *-*-mingw32*)
     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
       GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format"
+      GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Wno-format"
     fi
     ;;
   *) ;;
@@ -11579,31 +11594,36 @@ fi
 NO_WERROR=
 if test "${ERROR_ON_WARNING}" = yes ; then
     GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
+    GCC_WARN_CXXFLAGS="$GCC_WARN_CXXFLAGS -Werror"
     NO_WERROR="-Wno-error"
 fi
 
 if test "${GCC}" = yes ; then
   WARN_CFLAGS="${GCC_WARN_CFLAGS}"
+  WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}"
 fi
 
 # Check whether --enable-build-warnings was given.
 if test "${enable_build_warnings+set}" = set; then :
   enableval=$enable_build_warnings; case "${enableval}" in
-  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}";;
+  yes)	WARN_CFLAGS="${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${GCC_WARN_CXXFLAGS}";;
   no)	if test "${GCC}" = yes ; then
 	  WARN_CFLAGS="-w"
+	  WARN_CXXFLAGS="-w"
 	fi;;
   ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
         WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}";;
   *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
-        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}";;
-  *)    WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;;
+        WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}" WARN_CXXFLAGS="${t} ${GCC_WARN_CXXFLAGS}";;
+  *)    t=`echo "${enableval}" | sed -e "s/,/ /g"`
+    WARN_CFLAGS="${t}" WARN_CXXFLAGS="${t}";;
 esac
 fi
 
 
 if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
-  echo "Setting warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C warning flags = $WARN_CFLAGS" 6>&1
+  echo "Setting C++ warning flags = $WARN_CXXFLAGS" 6>&1
 fi
 
 
-- 
2.1.4


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