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dnl
dnl Check for compiler mechanism to show functions in debugging
dnl copied from an Ali patch floating on the internet
dnl
AC_DEFUN([AG_GST_CHECK_FUNCTION],[
dnl #1: __PRETTY_FUNCTION__
AC_MSG_CHECKING(whether $CC implements __PRETTY_FUNCTION__)
AC_CACHE_VAL(have_pretty_function,[
AC_TRY_LINK([#include <stdio.h>],
[printf("%s", __PRETTY_FUNCTION__);],
have_pretty_function=yes,
have_pretty_function=no)
])
AC_MSG_RESULT($have_pretty_function)
if test "$have_pretty_function" = yes; then
AC_DEFINE(HAVE_PRETTY_FUNCTION, 1,
[defined if the compiler implements __PRETTY_FUNCTION__])
fi
dnl #2: __FUNCTION__
AC_MSG_CHECKING(whether $CC implements __FUNCTION__)
AC_CACHE_VAL(have_function,[
AC_TRY_LINK([#include <stdio.h>],
[printf("%s", __FUNCTION__);],
have_function=yes,
have_function=no)
])
AC_MSG_RESULT($have_function)
if test "$have_function" = yes; then
AC_DEFINE(HAVE_FUNCTION, 1,
[defined if the compiler implements __FUNCTION__])
fi
dnl #3: __func__
AC_MSG_CHECKING(whether $CC implements __func__)
AC_CACHE_VAL(have_func,[
AC_TRY_LINK([#include <stdio.h>],
[printf("%s", __func__);],
have_func=yes,
have_func=no)
])
AC_MSG_RESULT($have_func)
if test "$have_func" = yes; then
AC_DEFINE(HAVE_FUNC, 1,
[defined if the compiler implements __func__])
fi
dnl now define FUNCTION to whatever works, and fallback to ""
if test "$have_pretty_function" = yes; then
function=__PRETTY_FUNCTION__
else
if test "$have_function" = yes; then
function=__FUNCTION__
else
if test "$have_func" = yes; then
function=__func__
else
function=\"\"
fi
fi
fi
AC_DEFINE_UNQUOTED(GST_FUNCTION, $function, [macro to use to show function name])
])
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