configure (enable_version_specific_runtime_libs): Implement new flag --enable-version-specific-runtime-libs which installs C++...

d
egcs/ChangeLog:
1998-06-24  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure (enable_version_specific_runtime_libs): Implement new flag
	--enable-version-specific-runtime-libs which installs C++ runtime stuff in
	$(libsubdir); emit definition in each generated Makefile.
	(gxx_include_dir): Initialize depending on $enable_version_specific_runtime_libs.
egcs/gcc/ChangeLog:
1998-06-24  Manfred Hollstein  <manfred@s-direktnet.de>
	* configure.in (gxx_include_dir): Initialize default value depending on
	new flag --enable-version-specific-runtime-libs; remove superfluous default
	initialization afterwards.
	* configure: Regenerate.
egcs/libio/ChangeLog:
1998-06-24  Manfred Hollstein  <manfred@s-direktnet.de>
	* Makefile.in (install): Install _G_config.h depending on new flag
	--enable-version-specific-runtime-libs.
	* config/linux.mt (gxx_include_dir): Remove definition here as we use
	gcc's default anyway.
egcs/libstdc++/ChangeLog:
1998-06-24  Manfred Hollstein  <manfred@s-direktnet.de>
	* Makefile.in (INSTALLDIR): Add comment to document the fact,
	this macro will be properly initialized at make's runtime.
	(install): Add initialization of INSTALLDIR depending on $(libsubdir)
	and ${enable_version_specific_runtime_libs}; use $${INSTALLDIR} shell variable
	instead of the $(INSTALLDIR) make macro.

From-SVN: r20694

2 files changed, 81 insertions, 87 deletions

diff --git a/gcc/configure b/gcc/configure
index 73f3dad..eb6c427c 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -615,15 +615,12 @@ if test "${with_gxx_include_dir+set}" = set; then
   withval="$with_gxx_include_dir"
   gxx_include_dir=$with_gxx_include_dir
 else
-  gxx_include_dir='${prefix}/include/g++'
+  if test x${enable_version_specific_runtime_libs} = xyes; then
+gxx_include_dir='${libsubdir}/include/g++'
+else gxx_include_dir='${prefix}/include/g++'; fi
 fi
 
 
-# Default g++ header file directory if it is empty
-if [ x$gxx_include_dir = x ]; then
-	gxx_include_dir='${prefix}/include/g++'
-fi
-
 # Enable expensive internal checks
 # Check whether --enable-checking or --disable-checking was given.
 if test "${enable_checking+set}" = set; then
@@ -753,7 +750,7 @@ else { echo "configure: error: can not run $ac_config_sub" 1>&2; exit 1; }
 fi
 
 echo $ac_n "checking host system type""... $ac_c" 1>&6
-echo "configure:757: checking host system type" >&5
+echo "configure:754: checking host system type" >&5
 
 host_alias=$host
 case "$host_alias" in
@@ -774,7 +771,7 @@ host_os=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
 echo "$ac_t""$host" 1>&6
 
 echo $ac_n "checking target system type""... $ac_c" 1>&6
-echo "configure:778: checking target system type" >&5
+echo "configure:775: checking target system type" >&5
 
 target_alias=$target
 case "$target_alias" in
@@ -792,7 +789,7 @@ target_os=`echo $target | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
 echo "$ac_t""$target" 1>&6
 
 echo $ac_n "checking build system type""... $ac_c" 1>&6
-echo "configure:796: checking build system type" >&5
+echo "configure:793: checking build system type" >&5
 
 build_alias=$build
 case "$build_alias" in
@@ -819,7 +816,7 @@ test "$host_alias" != "$target_alias" &&
 # Extract the first word of "gcc", so it can be a program name with args.
 set dummy gcc; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:823: checking for $ac_word" >&5
+echo "configure:820: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -848,7 +845,7 @@ if test -z "$CC"; then
   # Extract the first word of "cc", so it can be a program name with args.
 set dummy cc; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:852: checking for $ac_word" >&5
+echo "configure:849: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -896,7 +893,7 @@ fi
 fi
 
 echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works""... $ac_c" 1>&6
-echo "configure:900: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
+echo "configure:897: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
 
 ac_ext=c
 # CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
@@ -906,11 +903,11 @@ ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS
 cross_compiling=$ac_cv_prog_cc_cross
 
 cat > conftest.$ac_ext <<EOF
-#line 910 "configure"
+#line 907 "configure"
 #include "confdefs.h"
 main(){return(0);}
 EOF
-if { (eval echo configure:914: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:911: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   ac_cv_prog_cc_works=yes
   # If we can't run a trivial program, we are probably using a cross compiler.
   if (./conftest; exit) 2>/dev/null; then
@@ -930,12 +927,12 @@ if test $ac_cv_prog_cc_works = no; then
   { echo "configure: error: installation or configuration problem: C compiler cannot create executables." 1>&2; exit 1; }
 fi
 echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler""... $ac_c" 1>&6
-echo "configure:934: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
+echo "configure:931: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
 echo "$ac_t""$ac_cv_prog_cc_cross" 1>&6
 cross_compiling=$ac_cv_prog_cc_cross
 
 echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
-echo "configure:939: checking whether we are using GNU C" >&5
+echo "configure:936: checking whether we are using GNU C" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -944,7 +941,7 @@ else
   yes;
 #endif
 EOF
-if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:948: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
+if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:945: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
   ac_cv_prog_gcc=yes
 else
   ac_cv_prog_gcc=no
@@ -959,7 +956,7 @@ if test $ac_cv_prog_gcc = yes; then
   ac_save_CFLAGS="$CFLAGS"
   CFLAGS=
   echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
-echo "configure:963: checking whether ${CC-cc} accepts -g" >&5
+echo "configure:960: checking whether ${CC-cc} accepts -g" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -987,7 +984,7 @@ else
 fi
 
 echo $ac_n "checking whether ${MAKE-make} sets \${MAKE}""... $ac_c" 1>&6
-echo "configure:991: checking whether ${MAKE-make} sets \${MAKE}" >&5
+echo "configure:988: checking whether ${MAKE-make} sets \${MAKE}" >&5
 set dummy ${MAKE-make}; ac_make=`echo "$2" | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_prog_make_${ac_make}_set'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -1020,7 +1017,7 @@ do
 # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1024: checking for $ac_word" >&5
+echo "configure:1021: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_AWK'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1051,7 +1048,7 @@ done
 # Extract the first word of "flex", so it can be a program name with args.
 set dummy flex; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1055: checking for $ac_word" >&5
+echo "configure:1052: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_LEX'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1084,7 +1081,7 @@ then
   *) ac_lib=l ;;
   esac
   echo $ac_n "checking for yywrap in -l$ac_lib""... $ac_c" 1>&6
-echo "configure:1088: checking for yywrap in -l$ac_lib" >&5
+echo "configure:1085: checking for yywrap in -l$ac_lib" >&5
 ac_lib_var=`echo $ac_lib'_'yywrap | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -1092,7 +1089,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-l$ac_lib  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 1096 "configure"
+#line 1093 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -1103,7 +1100,7 @@ int main() {
 yywrap()
 ; return 0; }
 EOF
-if { (eval echo configure:1107: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:1104: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -1126,7 +1123,7 @@ fi
 fi
 
 echo $ac_n "checking whether ln works""... $ac_c" 1>&6
-echo "configure:1130: checking whether ln works" >&5
+echo "configure:1127: checking whether ln works" >&5
 if eval "test \"`echo '$''{'gcc_cv_prog_LN'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1158,7 +1155,7 @@ else
 fi
 
 echo $ac_n "checking whether ln -s works""... $ac_c" 1>&6
-echo "configure:1162: checking whether ln -s works" >&5
+echo "configure:1159: checking whether ln -s works" >&5
 if eval "test \"`echo '$''{'gcc_cv_prog_LN_S'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1190,19 +1187,19 @@ else
 fi
 
 echo $ac_n "checking for volatile""... $ac_c" 1>&6
-echo "configure:1194: checking for volatile" >&5
+echo "configure:1191: checking for volatile" >&5
 if eval "test \"`echo '$''{'gcc_cv_c_volatile'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1199 "configure"
+#line 1196 "configure"
 #include "confdefs.h"
 
 int main() {
 volatile int foo;
 ; return 0; }
 EOF
-if { (eval echo configure:1206: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1203: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   gcc_cv_c_volatile=yes
 else
@@ -1225,7 +1222,7 @@ fi
 # Extract the first word of "ranlib", so it can be a program name with args.
 set dummy ranlib; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1229: checking for $ac_word" >&5
+echo "configure:1226: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1256,7 +1253,7 @@ do
 # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1260: checking for $ac_word" >&5
+echo "configure:1257: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_YACC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1296,7 +1293,7 @@ test -n "$YACC" || YACC="yacc"
 # SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
 # ./install, which can be erroneously created by make from ./install.sh.
 echo $ac_n "checking for a BSD compatible install""... $ac_c" 1>&6
-echo "configure:1300: checking for a BSD compatible install" >&5
+echo "configure:1297: checking for a BSD compatible install" >&5
 if test -z "$INSTALL"; then
 if eval "test \"`echo '$''{'ac_cv_path_install'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -1347,7 +1344,7 @@ test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
 
 
 echo $ac_n "checking how to run the C preprocessor""... $ac_c" 1>&6
-echo "configure:1351: checking how to run the C preprocessor" >&5
+echo "configure:1348: checking how to run the C preprocessor" >&5
 # On Suns, sometimes $CPP names a directory.
 if test -n "$CPP" && test -d "$CPP"; then
   CPP=
@@ -1362,13 +1359,13 @@ else
   # On the NeXT, cc -E runs the code through the compiler's parser,
   # not just through cpp.
   cat > conftest.$ac_ext <<EOF
-#line 1366 "configure"
+#line 1363 "configure"
 #include "confdefs.h"
 #include <assert.h>
 Syntax Error
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1372: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1369: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   :
@@ -1379,13 +1376,13 @@ else
   rm -rf conftest*
   CPP="${CC-cc} -E -traditional-cpp"
   cat > conftest.$ac_ext <<EOF
-#line 1383 "configure"
+#line 1380 "configure"
 #include "confdefs.h"
 #include <assert.h>
 Syntax Error
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1389: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1386: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   :
@@ -1408,12 +1405,12 @@ fi
 echo "$ac_t""$CPP" 1>&6
 
 echo $ac_n "checking for ANSI C header files""... $ac_c" 1>&6
-echo "configure:1412: checking for ANSI C header files" >&5
+echo "configure:1409: checking for ANSI C header files" >&5
 if eval "test \"`echo '$''{'ac_cv_header_stdc'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1417 "configure"
+#line 1414 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 #include <stdarg.h>
@@ -1421,7 +1418,7 @@ else
 #include <float.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1425: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1422: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -1438,7 +1435,7 @@ rm -f conftest*
 if test $ac_cv_header_stdc = yes; then
   # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
 cat > conftest.$ac_ext <<EOF
-#line 1442 "configure"
+#line 1439 "configure"
 #include "confdefs.h"
 #include <string.h>
 EOF
@@ -1456,7 +1453,7 @@ fi
 if test $ac_cv_header_stdc = yes; then
   # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
 cat > conftest.$ac_ext <<EOF
-#line 1460 "configure"
+#line 1457 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 EOF
@@ -1477,7 +1474,7 @@ if test "$cross_compiling" = yes; then
   :
 else
   cat > conftest.$ac_ext <<EOF
-#line 1481 "configure"
+#line 1478 "configure"
 #include "confdefs.h"
 #include <ctype.h>
 #define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
@@ -1488,7 +1485,7 @@ if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
 exit (0); }
 
 EOF
-if { (eval echo configure:1492: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1489: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   :
 else
@@ -1512,12 +1509,12 @@ EOF
 fi
 
 echo $ac_n "checking whether time.h and sys/time.h may both be included""... $ac_c" 1>&6
-echo "configure:1516: checking whether time.h and sys/time.h may both be included" >&5
+echo "configure:1513: checking whether time.h and sys/time.h may both be included" >&5
 if eval "test \"`echo '$''{'ac_cv_header_time'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1521 "configure"
+#line 1518 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/time.h>
@@ -1526,7 +1523,7 @@ int main() {
 struct tm *tp;
 ; return 0; }
 EOF
-if { (eval echo configure:1530: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1527: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_header_time=yes
 else
@@ -1550,17 +1547,17 @@ for ac_hdr in limits.h stddef.h string.h strings.h stdlib.h time.h fcntl.h unist
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:1554: checking for $ac_hdr" >&5
+echo "configure:1551: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1559 "configure"
+#line 1556 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1564: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1561: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -1590,17 +1587,17 @@ done
 # Check for thread headers.
 ac_safe=`echo "thread.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for thread.h""... $ac_c" 1>&6
-echo "configure:1594: checking for thread.h" >&5
+echo "configure:1591: checking for thread.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1599 "configure"
+#line 1596 "configure"
 #include "confdefs.h"
 #include <thread.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1604: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1601: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -1624,17 +1621,17 @@ fi
 
 ac_safe=`echo "pthread.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for pthread.h""... $ac_c" 1>&6
-echo "configure:1628: checking for pthread.h" >&5
+echo "configure:1625: checking for pthread.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1633 "configure"
+#line 1630 "configure"
 #include "confdefs.h"
 #include <pthread.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1638: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1635: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -1660,12 +1657,12 @@ fi
 # See if the system preprocessor understands the ANSI C preprocessor
 # stringification operator.
 echo $ac_n "checking whether cpp understands the stringify operator""... $ac_c" 1>&6
-echo "configure:1664: checking whether cpp understands the stringify operator" >&5
+echo "configure:1661: checking whether cpp understands the stringify operator" >&5
 if eval "test \"`echo '$''{'gcc_cv_c_have_stringify'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1669 "configure"
+#line 1666 "configure"
 #include "confdefs.h"
 
 int main() {
@@ -1673,7 +1670,7 @@ int main() {
 char *test = S(foo);
 ; return 0; }
 EOF
-if { (eval echo configure:1677: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1674: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   gcc_cv_c_have_stringify=yes
 else
@@ -1696,12 +1693,12 @@ fi
 # Use <inttypes.h> only if it exists,
 # doesn't clash with <sys/types.h>, and declares intmax_t.
 echo $ac_n "checking for inttypes.h""... $ac_c" 1>&6
-echo "configure:1700: checking for inttypes.h" >&5
+echo "configure:1697: checking for inttypes.h" >&5
 if eval "test \"`echo '$''{'gcc_cv_header_inttypes_h'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1705 "configure"
+#line 1702 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <inttypes.h>
@@ -1709,7 +1706,7 @@ int main() {
 intmax_t i = -1;
 ; return 0; }
 EOF
-if { (eval echo configure:1713: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1710: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   cat >> confdefs.h <<EOF
 #define HAVE_INTTYPES_H 1
@@ -1732,12 +1729,12 @@ for ac_func in strtoul bsearch strerror putenv popen bcopy bzero bcmp \
 	sysconf isascii
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:1736: checking for $ac_func" >&5
+echo "configure:1733: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1741 "configure"
+#line 1738 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -1760,7 +1757,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:1764: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:1761: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -1786,12 +1783,12 @@ done
 
 
 echo $ac_n "checking for vprintf""... $ac_c" 1>&6
-echo "configure:1790: checking for vprintf" >&5
+echo "configure:1787: checking for vprintf" >&5
 if eval "test \"`echo '$''{'ac_cv_func_vprintf'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1795 "configure"
+#line 1792 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char vprintf(); below.  */
@@ -1814,7 +1811,7 @@ vprintf();
 
 ; return 0; }
 EOF
-if { (eval echo configure:1818: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:1815: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_func_vprintf=yes"
 else
@@ -1838,12 +1835,12 @@ fi
 
 if test "$ac_cv_func_vprintf" != yes; then
 echo $ac_n "checking for _doprnt""... $ac_c" 1>&6
-echo "configure:1842: checking for _doprnt" >&5
+echo "configure:1839: checking for _doprnt" >&5
 if eval "test \"`echo '$''{'ac_cv_func__doprnt'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1847 "configure"
+#line 1844 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char _doprnt(); below.  */
@@ -1866,7 +1863,7 @@ _doprnt();
 
 ; return 0; }
 EOF
-if { (eval echo configure:1870: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:1867: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_func__doprnt=yes"
 else
@@ -1902,7 +1899,7 @@ fi
 
 
 echo $ac_n "checking whether the printf functions support %p""... $ac_c" 1>&6
-echo "configure:1906: checking whether the printf functions support %p" >&5
+echo "configure:1903: checking whether the printf functions support %p" >&5
 if eval "test \"`echo '$''{'gcc_cv_func_printf_ptr'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1910,7 +1907,7 @@ else
   gcc_cv_func_printf_ptr=no
 else
   cat > conftest.$ac_ext <<EOF
-#line 1914 "configure"
+#line 1911 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 
@@ -1923,7 +1920,7 @@ main()
   exit (p != q);
 }
 EOF
-if { (eval echo configure:1927: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1924: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   gcc_cv_func_printf_ptr=yes
 else
@@ -1951,12 +1948,12 @@ for ac_func in malloc realloc calloc free bcopy bzero bcmp \
 	index rindex getenv atol sbrk abort atof
 do
 echo $ac_n "checking whether $ac_func must be declared""... $ac_c" 1>&6
-echo "configure:1955: checking whether $ac_func must be declared" >&5
+echo "configure:1952: checking whether $ac_func must be declared" >&5
 if eval "test \"`echo '$''{'gcc_cv_decl_needed_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1960 "configure"
+#line 1957 "configure"
 #include "confdefs.h"
 
 #include <stdio.h>
@@ -1983,7 +1980,7 @@ int main() {
 char *(*pfn) = (char *(*)) $ac_func
 ; return 0; }
 EOF
-if { (eval echo configure:1987: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1984: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   eval "gcc_cv_decl_needed_$ac_func=no"
 else
@@ -2010,12 +2007,12 @@ done
 
 
 echo $ac_n "checking for sys_siglist declaration in signal.h or unistd.h""... $ac_c" 1>&6
-echo "configure:2014: checking for sys_siglist declaration in signal.h or unistd.h" >&5
+echo "configure:2011: checking for sys_siglist declaration in signal.h or unistd.h" >&5
 if eval "test \"`echo '$''{'ac_cv_decl_sys_siglist'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2019 "configure"
+#line 2016 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <signal.h>
@@ -2027,7 +2024,7 @@ int main() {
 char *msg = *(sys_siglist + 1);
 ; return 0; }
 EOF
-if { (eval echo configure:2031: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2028: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_decl_sys_siglist=yes
 else
@@ -5137,7 +5134,7 @@ fi
 
 # Figure out what assembler alignment features are present.
 echo $ac_n "checking assembler alignment features""... $ac_c" 1>&6
-echo "configure:5141: checking assembler alignment features" >&5
+echo "configure:5138: checking assembler alignment features" >&5
 gcc_cv_as=
 gcc_cv_as_alignment_features=
 if [ -x as$host_exeext ]; then
diff --git a/gcc/configure.in b/gcc/configure.in
index 82a81e6..6667857 100644
--- a/gcc/configure.in
+++ b/gcc/configure.in
@@ -71,12 +71,9 @@ AC_ARG_WITH(gxx-include-dir,
 [  --with-gxx-include-dir=DIR
                           specifies directory to put g++ header files.],
 gxx_include_dir=$with_gxx_include_dir,
-gxx_include_dir='${prefix}/include/g++')
-
-# Default g++ header file directory if it is empty
-if [[ x$gxx_include_dir = x ]]; then
-	gxx_include_dir='${prefix}/include/g++'
-fi
+if test x${enable_version_specific_runtime_libs} = xyes; then
+gxx_include_dir='${libsubdir}/include/g++'
+else gxx_include_dir='${prefix}/include/g++'; fi)
 
 # Enable expensive internal checks
 AC_ARG_ENABLE(checking,