Support bsp_specs style building for linux and solaris. Improved C++

support.

configure.in

@@ -134,8 +134,6 @@ case "${target}" in
         RTEMS_HOST=Linux
         # override these settings
 	RTEMS_HAS_POSIX_API=no
-        RTEMS_USE_GCC272=yes
-        RTEMS_LIBC_DIR=/usr
 	;;
   no_cpu-*rtems*)
         target_cpu=no_cpu
@@ -146,8 +144,6 @@ case "${target}" in
         RTEMS_HOST=Solaris
         # override these settings
 	RTEMS_HAS_POSIX_API=no
-        RTEMS_USE_GCC272=yes
-        RTEMS_LIBC_DIR=/usr
 	;;
   *) 
 	RTEMS_CANONICAL_TARGET_CPU
@@ -182,23 +178,30 @@ fi
 dnl check target cc
 CC="$program_prefix"gcc
 RTEMS_PROG_CC
+dnl check if the compiler supports --specs
+RTEMS_GCC_SPECS
+dnl check if the target compiler may use --pipe
+RTEMS_GCC_PIPE
 
 dnl check if the compiler supports --specs if gcc28 is requested
 if test "$RTEMS_USE_GCC272" != "yes" ; then
-  RTEMS_GCC_SPECS
   if test "$rtems_cv_gcc_specs" = "no"; then
     AC_MSG_WARN([*** disabling --enable-gcc28])
      RTEMS_USE_GCC272=yes
   fi
 fi
 
-dnl check if the target compiler may use --pipe
-RTEMS_GCC_PIPE
-
 dnl check for g++
 if test "$RTEMS_HAS_CPLUSPLUS" = "yes"; then
   CXX="$program_prefix"g++
   RTEMS_PROG_CXX
+  if test "$rtems_cv_prog_cc_cross" != "$rtems_cv_prog_cxx_cross"; then
+    AC_MSG_ERROR([***]
+     [Inconsistency in compiler configuration:]
+     [Target C compiler and Target C++ compiler]
+     [must both ether be cross compilers or native compilers]
+     [Hint: LD_LIBRARY_PATH ?] )
+  fi
   AC_PATH_PROG(CXX_FOR_TARGET,"$program_prefix"g++,no)
 else
   CXX_FOR_TARGET="no"
@@ -366,6 +369,7 @@ AC_ARG_ENABLE(hwapi, \
   AC_MSG_RESULT(no)
 )
 
+AC_SUBST(rtems_cv_prog_cc_cross)
 AC_SUBST(RTEMS_BSP_LIST)
 AC_SUBST(RTEMS_HOST)
 AC_SUBST(RTEMS_LIBC_DIR)