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dnl

dnl $Id: prog-cxx.m4,v 1.2 2001-09-27 11:59:11 chris Exp $

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_BEFORE([$0], [RTEMS_CANONICALIZE_TOOLS])dnl

AC_REQUIRE([RTEMS_TOOL_PREFIX])dnl

AC_REQUIRE([RTEMS_ENABLE_LIBCDIR])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

dnl somehow autoconf macros leave this file

rm -f conftest.C

])

AC_DEFUN(RTEMS_PROG_CXX_FOR_TARGET,

[

  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 either be cross compilers or native compilers]

     [Hint: If building a posix bsp: LD_LIBRARY_PATH?] )

  fi

])