dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
+dnl Prerequisites.
+
+dnl Instead of giving an error about each prerequisite as we encounter it,
+dnl group them all together at the end of the run, to be user-friendly.
+AC_DEFUN([PSPP_REQUIRED_PREREQ], [pspp_required_prereqs="$pspp_required_prereqs
+ $1"])
+AC_DEFUN([PSPP_OPTIONAL_PREREQ], [pspp_optional_prereqs="$pspp_optional_prereqs
+ $1"])
+AC_DEFUN([PSPP_CHECK_PREREQS],
+[
+ if test "$pspp_optional_prereqs" != ""; then
+ AC_MSG_WARN([The following optional prerequisites are not installed.
+You may wish to install them to obtain additional functionality:$pspp_optional_prereqs])
+fi
+ if test "$pspp_required_prereqs" != ""; then
+ AC_MSG_ERROR([The following required prerequisites are not installed.
+You must install them before PSPP can be built:$pspp_required_prereqs])
+fi
+])
+
+
dnl Check that a new enough version of Perl is available.
AC_DEFUN([PSPP_PERL],
[
AC_PATH_PROG([PERL], perl, no)
AC_SUBST([PERL])dnl
- if test "$PERL" = no; then
- AC_MSG_ERROR([perl is not found])
+ if test "$PERL" != no && $PERL -e 'require 5.005_03;'; then :; else
+ PSPP_REQUIRED_PREREQ([Perl 5.005_03 (or later)])
fi
- $PERL -e 'require 5.005_03;' || {
- AC_MSG_ERROR([Perl 5.005_03 or better is required])
- }
])
dnl Check that libplot is available.
AC_ARG_WITH(libplot, [ --without-libplot don't compile in support of charts (using libplot)])
if test x"$with_libplot" != x"no" ; then
- AC_CHECK_LIB(plot, pl_newpl_r,,
- AC_MSG_ERROR([You must install libplot development libraries (or use --without-libplot)])
- )
+ AC_CHECK_LIB(plot, pl_newpl_r,,
+ [PSPP_REQUIRED_PREREQ([libplot (or use --without-libplot)])])
fi
])
if test "$gl_cv_lib_readline" = yes; then
AC_DEFINE(HAVE_READLINE, 1, [Define if you have the readline library.])
- fi
-
- if test "$gl_cv_lib_readline" = yes; then
AC_MSG_CHECKING([how to link with libreadline])
AC_MSG_RESULT([$LIBREADLINE])
else
LTLIBREADLINE=
LIBHISTORY=
LTLIBHISTORY=
+ PSPP_OPTIONAL_PREREQ([libreadline (which may itself require libncurses or libtermcap)])
fi
AC_SUBST(LIBREADLINE)
AC_SUBST(LTLIBREADLINE)