AC_CXX_TEMPLATE_OBJS
, 

2005年01月25日

Luc Maisonobe <luc@spaceroots.org>

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Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. Users of this software should generally follow the principles of the MIT License includings its disclaimer.

cryp.to ac-archive's Obsoleted (obsoleted)

• obsoleted Unnecessary with recent versions of libtool.

NOTE: AC_CXX_TEMPLATE_OBJS macro is not needed anymore, recent versions of libtool handle correctly these extra object files by recognizing the SUN compiler "CC" and using it with the "-xar" switch to pack libraries instead of using the more classical "ar" command. Using recent libtool with the SUN compiler AND this macro does not work at all.

This macro tries to find the place where the objects files resulting from templates instantiations are stored and the associated compiler flags. This is particularly useful to include these files in libraries. Currently only g++/egcs and SUN CC are supported (there is nothing to be done for the formers while the latter uses directory ./Templates.DB if you use the -ptr. flag). This macro sets the CXXFLAGS if needed, it also sets the output variable TEMPLATES_OBJ. Note that if you use libtool, this macro does work correctly with the SUN compilers ONLY while building static libraries. Since there are sometimes problems with exception handling with multiple levels of shared libraries even with g++ on this platform, you may wish to enforce the usage of static libraires there. You can do this by putting the following statements in your configure.in file:

 AC_CANONICAL_HOST
 case x$host_os in
 xsolaris*) AC_DISABLE_SHARED ;;
 esac
 AM_PROG_LIBTOOL

AC_DEFUN([AC_CXX_TEMPLATE_OBJS],
dnl
dnl This macro is OBSOLETE; do not use.
dnl
[AC_CACHE_CHECK(where template objects are stored, ac_cv_cxx_templobjs,
 [ ac_cv_cxx_templobjs='unknown'
 if test "$GXX" = yes; then
 ac_cv_cxx_templobjs='nowhere'
 else
 case $CXX in
 CC|*/CC)
 cat > conftest.cc <<EOF
template<class T> class A { public : A () {} };
template<class T> void f (const A<T>&) {}
main()
{ A<double> d;
 A<int> i;
 f (d);
 f (i);
 return 0;
}
EOF
 if test "$ac_cv_cxx_templobjs" = 'unknown' ; then
 if test -d Templates.DB ; then
 rm -fr Templates.DB
 fi
 if $CXX $CXXFLAGS -ptr. -c conftest.cc 1> /dev/null 2>&1; then
 if test -d Templates.DB ; then
# this should be Sun CC <= 4.2
 CXXFLAGS="$CXXFLAGS -ptr."
 if test x"$LIBTOOL" = x ; then
 ac_cv_cxx_templobjs='Templates.DB/*.o'
 else
 ac_cv_cxx_templobjs='Templates.DB/*.lo'
 fi
 rm -fr Templates.DB
 fi
 fi
 fi
 if test "$ac_cv_cxx_templobjs" = 'unknown' ; then
 if test -d SunWS_cache ; then
 rm -fr SunWS_cache
 fi
 if $CXX $CXXFLAGS -c conftest.cc 1> /dev/null 2>&1; then
 if test -d SunWS_cache ; then
# this should be Sun WorkShop C++ compiler 5.x
# or Sun Forte C++ compiler >= 6.x
 if test x"$LIBTOOL" = x ; then
 ac_cv_cxx_templobjs='SunWS_cache/*/*.o'
 else
 ac_cv_cxx_templobjs='SunWS_cache/*/*.lo'
 fi
 rm -fr SunWS_cache
 fi
 fi
 fi
 rm -f conftest* ;;
 esac
 fi
 case "x$ac_cv_cxx_templobjs" in
 xunknown|xnowhere)
 TEMPLATE_OBJS="" ;;
 *)
 TEMPLATE_OBJS="$ac_cv_cxx_templobjs" ;;
 esac
 AC_SUBST(TEMPLATE_OBJS)])])