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dnl ** Have libdw?
dnl --------------------------------------------------------------
dnl Sets UseLibdw.
AC_DEFUN([FP_FIND_LIBDW],
[
AC_ARG_WITH([libdw-libraries],
[AS_HELP_STRING([--with-libdw-libraries=ARG],
[Find libraries for libdw in ARG [default=system default]])
],
[
LibdwLibDir="$withval"
LIBDW_LDFLAGS="-L$withval"
])
AC_SUBST(LibdwLibDir)
AC_ARG_WITH([libdw-includes],
[AS_HELP_STRING([--with-libdw-includes=ARG],
[Find includes for libdw in ARG [default=system default]])
],
[
LibdwIncludeDir="$withval"
LIBDW_CFLAGS="-I$withval"
])
AC_SUBST(LibdwIncludeDir)
UseLibdw=NO
USE_LIBDW=0
AC_ARG_ENABLE(dwarf-unwind,
[AS_HELP_STRING([--enable-dwarf-unwind],
[Enable DWARF unwinding support in the runtime system via elfutils' libdw [default=no]])])
if test "$enable_dwarf_unwind" = "yes" ; then
CFLAGS2="$CFLAGS"
CFLAGS="$LIBDW_CFLAGS $CFLAGS"
LDFLAGS2="$LDFLAGS"
LDFLAGS="$LIBDW_LDFLAGS $LDFLAGS"
AC_CHECK_LIB(dw, dwfl_attach_state,
[AC_CHECK_HEADERS([elfutils/libdw.h], [break], [])
UseLibdw=YES],
[AC_MSG_ERROR([Cannot find system libdw (required by --enable-dwarf-unwind)])])
CFLAGS="$CFLAGS2"
LDFLAGS="$LDFLAGS2"
fi
AC_SUBST(UseLibdw)
if test $UseLibdw = "YES" ; then
USE_LIBDW=1
fi
AC_DEFINE_UNQUOTED([USE_LIBDW], [$USE_LIBDW], [Set to 1 to use libdw])
])
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