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dnl
dnl $Id$
dnl
dnl Check for target g++
dnl
dnl 98/05/20 Ralf Corsepius (corsepiu@faw.uni-ulm.de)
dnl Completely reworked
AC_DEFUN(RTEMS_PROG_CXX,
[
AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
AC_BEFORE([$0], [AC_PROG_CXX])dnl
AC_REQUIRE([RTEMS_TOOL_PREFIX])dnl
dnl Only accept g++ and c++
dnl NOTE: This might be too restrictive for native compilation
AC_PATH_PROGS(CXX_FOR_TARGET, "$program_prefix"g++ "$program_prefix"c++)
test -z "$CXX_FOR_TARGET" \
&& AC_MSG_ERROR([no acceptable c++ found in \$PATH])
dnl backup
rtems_save_CXX=$CXX
rtems_save_CXXFLAGS=$CXXFLAGS
dnl temporarily set CXX
CXX=$CXX_FOR_TARGET
AC_PROG_CXX_WORKS
AC_PROG_CXX_GNU
if test $ac_cv_prog_gxx = yes; then
GXX=yes
dnl Check whether -g works, even if CXXFLAGS is set, in case the package
dnl plays around with CXXFLAGS (such as to build both debugging and
dnl normal versions of a library), tasteless as that idea is.
ac_test_CXXFLAGS="${CXXFLAGS+set}"
ac_save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS=
AC_PROG_CXX_G
if test "$ac_test_CXXFLAGS" = set; then
CXXFLAGS="$ac_save_CXXFLAGS"
elif test $ac_cv_prog_cxx_g = yes; then
CXXFLAGS="-g -O2"
else
CXXFLAGS="-O2"
fi
else
GXX=
test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
fi
rtems_cv_prog_gxx=$ac_cv_prog_gxx
rtems_cv_prog_cxx_g=$ac_cv_prog_cxx_g
rtems_cv_prog_cxx_works=$ac_cv_prog_cxx_works
rtems_cv_prog_cxx_cross=$ac_cv_prog_cxx_cross
CXX=$rtems_save_CXX
CXXFLAGS=$rtems_save_CXXFLAGS
dnl restore initial values
unset ac_cv_prog_gxx
unset ac_cv_prog_cc_g
unset ac_cv_prog_cxx_works
unset ac_cv_prog_cxx_cross
])
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