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configure.in: eliminate CXX_ABI and OCTAVE_CXX_PREPEND_UNDERSCORE
author John W. Eaton <jwe@octave.org>
date Wed, 30 Jul 2008 14:13:45 -0400
parents 80a715c4824d
children 4363bc94171a
comparison
equal deleted inserted replaced
7995:89dd4531b26a 7996:6a7db240b3a3
625 AC_MSG_WARN($warn_texi2pdf) 625 AC_MSG_WARN($warn_texi2pdf)
626 fi 626 fi
627 AC_SUBST(TEXI2PDF) 627 AC_SUBST(TEXI2PDF)
628 ]) 628 ])
629 dnl 629 dnl
630 dnl Find nm.
631 dnl
632 dnl OCTAVE_PROG_NM
633 AC_DEFUN(OCTAVE_PROG_NM,
634 [AC_CHECK_PROG(NM, ${ac_tool_prefix}nm, ${ac_tool_prefix}nm, [])
635 AC_SUBST(NM)
636 ])
637 dnl
638 dnl See if the C++ compiler prepends an underscore to external names.
639 dnl
640 dnl OCTAVE_CXX_PREPENDS_UNDERSCORE
641 AC_DEFUN(OCTAVE_CXX_PREPENDS_UNDERSCORE, [
642 AC_REQUIRE([OCTAVE_PROG_NM])
643 AC_MSG_CHECKING([whether ${CXX-g++} prepends an underscore to external names])
644 AC_CACHE_VAL(octave_cv_cxx_prepends_underscore,
645 [octave_cv_cxx_prepends_underscore=no
646 AC_LANG_PUSH(C++)
647 cat > conftest.$ac_ext <<EOF
648 bool FSmy_dld_fcn (void) { return false; }
649 EOF
650 if (eval "$ac_compile") 2>&AS_MESSAGE_LOG_FD; then
651 if test "`${NM-nm} conftest.$ac_objext | grep _FSmy_dld_fcn`" != ""; then
652 octave_cv_cxx_prepends_underscore=yes
653 fi
654 else
655 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
656 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
657 fi
658 AC_LANG_POP(C++)
659 ### FIXME -- Ignore test result on Windows. Yes it prepends
660 ### underscore, but LoadLibrary ignores it automatically. The
661 ### correct test is to build the shared library then try to grab the
662 ### symbol from it with and without underscore.
663 case "$canonical_host_type" in
664 *-*-cygwin* | *-*-mingw*)
665 octave_cv_cxx_prepends_underscore=no
666 ;;
667 ### FIXME -- Ignore test result on OS X. Yes it prepends
668 ### underscore, but also messes with the name so test fails (incorrectly).
669 *-*-darwin*)
670 octave_cv_cxx_prepends_underscore=yes
671 ;;
672 esac
673 ])
674 AC_MSG_RESULT($octave_cv_cxx_prepends_underscore)
675 if test $octave_cv_cxx_prepends_underscore = yes; then
676 AC_DEFINE(CXX_PREPENDS_UNDERSCORE, 1, [Define if your compiler prepends underscores to external names.])
677 fi
678 ])
679 dnl
680 dnl See if the C++ library is ISO compliant. 630 dnl See if the C++ library is ISO compliant.
681 dnl FIXME: This is obviously very simplistic, and trivially fooled. 631 dnl FIXME: This is obviously very simplistic, and trivially fooled.
682 dnl 632 dnl
683 dnl OCTAVE_CXX_ISO_COMPLIANT_LIBRARY 633 dnl OCTAVE_CXX_ISO_COMPLIANT_LIBRARY
684 AC_DEFUN(OCTAVE_CXX_ISO_COMPLIANT_LIBRARY, [ 634 AC_DEFUN(OCTAVE_CXX_ISO_COMPLIANT_LIBRARY, [
735 AC_MSG_WARN([I need GNU Readline 4.2 or later]) 685 AC_MSG_WARN([I need GNU Readline 4.2 or later])
736 AC_MSG_ERROR([this is fatal unless you specify --disable-readline]) 686 AC_MSG_ERROR([this is fatal unless you specify --disable-readline])
737 ]) 687 ])
738 fi 688 fi
739 AC_SUBST(LIBREADLINE) 689 AC_SUBST(LIBREADLINE)
740 ])
741 dnl
742 dnl Determine the C++ compiler ABI. It sets the macro CXX_ABI to the
743 dnl name of the ABI, and is used to mangle the C linkage loadable
744 dnl functions to avoid ABI mismatch. GNU C++ currently uses gnu_v2
745 dnl (GCC versions <= 2.95.x) dnl or gnu_v3 (GCC versions >= 3.0).
746 dnl Set to "unknown" is when we don't know enough about the ABI, which
747 dnl will happen when using an unsupported C++ compiler.
748 dnl
749 dnl OCTAVE_CXX_ABI
750 AC_DEFUN(OCTAVE_CXX_ABI, [
751 AC_REQUIRE([OCTAVE_PROG_NM])
752 AC_MSG_CHECKING([C++ ABI version used by ${CXX}])
753 AC_CACHE_VAL(octave_cv_cxx_abi,
754 [octave_cv_cxx_abi='unknown'
755 AC_LANG_PUSH(C++)
756 cat > conftest.$ac_ext <<EOF
757 bool FSmy_dld_fcn (void) { return false; }
758 EOF
759 if (eval "$ac_compile") 2>&AS_MESSAGE_LOG_FD; then
760 if test "`${NM-nm} conftest.$ac_objext | grep FSmy_dld_fcn__Fv`" != ""; then
761 octave_cv_cxx_abi='gnu_v2'
762 fi
763 if test "`${NM-nm} conftest.$ac_objext | grep _Z12FSmy_dld_fcnv`" != ""; then
764 octave_cv_cxx_abi='gnu_v3'
765 fi
766 if test "`${NM-nm} conftest.$ac_objext | grep __1cMFSmy_dld_fcn6F_b_`" != ""; then
767 octave_cv_cxx_abi='sun_v5'
768 fi
769 else
770 echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
771 cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
772 fi
773 AC_LANG_POP(C++)
774 ])
775 AC_MSG_RESULT($octave_cv_cxx_abi)
776 AC_DEFINE_UNQUOTED(CXX_ABI, $octave_cv_cxx_abi, [Define to the C++ ABI your compiler uses.])
777 ]) 690 ])
778 dnl 691 dnl
779 dnl Check to see if C++ reintrepret cast works for function pointers. 692 dnl Check to see if C++ reintrepret cast works for function pointers.
780 dnl 693 dnl
781 dnl OCTAVE_CXX_BROKEN_REINTERPRET_CAST 694 dnl OCTAVE_CXX_BROKEN_REINTERPRET_CAST