+ AC_ARG_WITH(
+ libplot,
+ [AS_HELP_STRING([--without-libplot],
+ [don't compile in support of charts (using libplot)])])
+
+ if test x"$with_libplot" != x"no" ; then
+ # Check whether we can link against libplot without any extra libraries.
+ AC_CHECK_LIB(plot, pl_newpl_r, [LIBPLOT_LIBS="-lplot"])
+
+ # Check whether we can link against libplot if we also link X.
+ if test x"$LIBPLOT_LIBS" = x""; then
+ AC_PATH_XTRA
+ extra_libs="-lXaw -lXmu -lXt $X_PRE_LIBS -lXext -lX11 $X_EXTRA_LIBS -lm"
+ AC_CHECK_LIB(plot, pl_newpl_r,
+ [LIBPLOT_LIBS="-lplot $extra_libs"
+ LDFLAGS="$LDFLAGS $X_LIBS"],,
+ [$extra_libs])
+ fi
+
+ # Still can't link?
+ if test x"$LIBPLOT_LIBS" = x""; then
+ PSPP_REQUIRED_PREREQ([libplot (or use --without-libplot)])
+ fi
+
+ # Set up to make everything work.
+ LIBS="$LIBPLOT_LIBS $LIBS"
+ AC_DEFINE(HAVE_LIBPLOT, 1,
+ [Define to 1 if you have the `libplot' library (-lplot).])
+ fi
+])
+
+dnl Check whether a C compiler option is accepted.
+dnl If so, add it to CFLAGS.
+dnl Example: PSPP_ENABLE_OPTION(-Wdeclaration-after-statement)
+AC_DEFUN([PSPP_ENABLE_OPTION],
+[
+ m4_define([pspp_cv_name], [pspp_cv_[]m4_translit([$1], [-], [_])])dnl
+ AC_CACHE_CHECK([whether $CC accepts $1], [pspp_cv_name],
+ [pspp_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $1"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [pspp_cv_name[]=yes], [pspp_cv_name[]=no])
+ CFLAGS="$pspp_save_CFLAGS"])
+ if test $pspp_cv_name = yes; then
+ CFLAGS="$CFLAGS $1"
+ fi
+])
+
+dnl Check for readline and history libraries.
+
+dnl Modified for PSPP, based on readline.m4 serial 3 from
+dnl gnulib, which was written by Simon Josefsson, with help from Bruno
+dnl Haible and Oskar Liljeblad.
+
+AC_DEFUN([PSPP_READLINE],
+[
+ dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
+ AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
+ AC_REQUIRE([AC_LIB_RPATH])
+
+ dnl Search for libreadline and define LIBREADLINE, LTLIBREADLINE and
+ dnl INCREADLINE accordingly.
+ AC_LIB_LINKFLAGS_BODY([readline])
+ AC_LIB_LINKFLAGS_BODY([history])
+
+ dnl Add $INCREADLINE to CPPFLAGS before performing the following checks,
+ dnl because if the user has installed libreadline and not disabled its use
+ dnl via --without-libreadline-prefix, he wants to use it. The AC_LINK_IFELSE
+ dnl will then succeed.
+ am_save_CPPFLAGS="$CPPFLAGS"
+ AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCREADLINE $INCHISTORY])
+
+ AC_CACHE_CHECK(for readline, gl_cv_lib_readline, [
+ gl_cv_lib_readline=no
+ am_save_LIBS="$LIBS"
+ dnl On some systems, -lreadline doesn't link without an additional
+ dnl -lncurses or -ltermcap.
+ dnl Try -lncurses before -ltermcap, because libtermcap is unsecure
+ dnl by design and obsolete since 1994. Try -lcurses last, because
+ dnl libcurses is unusable on some old Unices.
+ for extra_lib in "" ncurses termcap curses; do
+ LIBS="$am_save_LIBS $LIBREADLINE $LIBHISTORY"
+ if test -n "$extra_lib"; then
+ LIBS="$LIBS -l$extra_lib"
+ fi
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
+#include <readline/readline.h>
+#include <readline/history.h>]], [[readline((char*)0); add_history((char*)0);]])],[gl_cv_lib_readline=yes],[])
+ if test "$gl_cv_lib_readline" = yes; then
+ if test -n "$extra_lib"; then
+ LIBREADLINE="$LIBREADLINE $LIBHISTORY -l$extra_lib"
+ LTLIBREADLINE="$LTLIBREADLINE $LTLIBHISTORY -l$extra_lib"
+ fi
+ break
+ fi
+ done
+ LIBS="$am_save_LIBS"
+ ])
+
+ if test "$gl_cv_lib_readline" = yes; then
+ AC_DEFINE(HAVE_READLINE, 1, [Define if you have the readline library.])
+ AC_MSG_CHECKING([how to link with libreadline])
+ AC_MSG_RESULT([$LIBREADLINE])
+ else
+ dnl If $LIBREADLINE didn't lead to a usable library, we don't
+ dnl need $INCREADLINE either.
+ CPPFLAGS="$am_save_CPPFLAGS"
+ LIBREADLINE=
+ LTLIBREADLINE=
+ LIBHISTORY=
+ LTLIBHISTORY=
+ PSPP_OPTIONAL_PREREQ([libreadline (which may itself require libncurses or libtermcap)])
+ fi
+ AC_SUBST(LIBREADLINE)
+ AC_SUBST(LTLIBREADLINE)
+])
+
+dnl Check for build tools. Adapted from bfd library.
+
+AC_DEFUN([PSPP_CC_FOR_BUILD],
+[# Put a plausible default for CC_FOR_BUILD in Makefile.
+if test -z "$CC_FOR_BUILD"; then
+ if test "x$cross_compiling" = "xno"; then
+ CC_FOR_BUILD='$(CC)'
+ else
+ CC_FOR_BUILD=cc
+ fi
+fi
+AC_SUBST(CC_FOR_BUILD)
+# Also set EXEEXT_FOR_BUILD.
+if test "x$cross_compiling" = "xno"; then
+ EXEEXT_FOR_BUILD='$(EXEEXT)'