detect ruby in configure script

[swftools.git] / m4 / ruby.m4

diff --git a/m4/ruby.m4 b/m4/ruby.m4
new file mode 100644 (file)
index 0000000..f64d6e6
--- /dev/null
+++ b/m4/ruby.m4
@@ -0,0 +1,89 @@
+AC_DEFUN([RFX_CHECK_RUBY],
+[
+AC_PATH_PROG([RUBY], [ruby],,)
+
+RUBY_CPPFLAGS=""
+RUBY_LDFLAGS=""
+RUBY_LIBS=""
+
+rubylib=ruby18
+
+AC_MSG_CHECKING([for ruby's include directory])
+if test "x$RUBY" '!=' "x";then
+    rubyinc=`$RUBY -e 'require "rbconfig";puts Config::expand(Config::CONFIG.send("\x5b\x5d", "archdir"))' 2>/dev/null`
+    if test -d $rubyinc;then
+       AC_MSG_RESULT($rubyinc)
+
+       # If we got a sensible archdir, we also ask ruby to supply us with CPPFLAGS
+       # and LDFLAGS.
+       AC_MSG_CHECKING([for ruby's cpp flags])
+       rubycpp=`$RUBY -e 'require "rbconfig";puts Config::expand(Config::CONFIG.send("\x5b\x5d", "CPPFLAGS"))' 2>/dev/null`
+       AC_MSG_RESULT($rubycpp)
+       
+       AC_MSG_CHECKING([for ruby's ld flags])
+       rubyld=`$RUBY -e 'require "rbconfig";puts Config::expand(Config::CONFIG.send("\x5b\x5d", "LIBRUBYARG_SHARED"))' 2>/dev/null`
+       AC_MSG_RESULT($rubyld)
+       
+       AC_MSG_CHECKING([for ruby library name])
+       rubylib=`$RUBY -e 'require "rbconfig";puts Config::expand(Config::CONFIG.send("\x5b\x5d", "RUBY_SO_NAME"))' 2>/dev/null`
+       AC_MSG_RESULT($rubylib)
+
+       RUBY_CPPFLAGS="$rubycpp -I$rubyinc $RUBY_CPPFLAGS"
+       RUBY_LDFLAGS="$rubyld $RUBY_LDFLAGS"
+    else
+       AC_MSG_RESULT('unknown')
+    fi
+else
+    AC_MSG_RESULT('unknown')
+fi
+
+#OLDLDFLAGS="$LDFLAGS"
+#LDFLAGS="$LDFLAGS $RUBY_LDFLAGS"
+#AC_CHECK_LIB($rubylib, rb_define_method, HAVE_RUBY_LIB=1,)
+#LDFLAGS="$OLDLDFLAGS"
+
+OLDCPPFLAGS="$CPPFLAGS"
+CPPFLAGS="$CPPFLAGS $RUBY_CPPFLAGS"
+AC_CHECK_HEADERS([ruby.h],[HAVE_RUBY_H=1])
+CPPFLAGS="$OLDCPPFLAGS"
+
+AC_MSG_CHECKING([whether we should compile the ruby module])
+if test "x${HAVE_RUBY_H}" '!=' "x";then
+    #RUBY_LIBS="$RUBY_LIBS -l$rubylib"
+
+    cat > conftest.c << EOF
+#include <ruby.h>
+static VALUE foobar;
+VALUE foobar_set_foo(VALUE module, VALUE _key, VALUE _value)
+{
+    return Qnil;
+}
+int Init_foobar()
+{
+    foobar = rb_define_module("foobar");
+    rb_define_module_function(foobar, "set_foo", foobar_set_foo, 2);
+}
+int main() {return 0;}
+EOF
+    ac_link='$CC $SHARED $CPPFLAGS $RUBY_CPPFLAGS $CFLAGS conftest.c $LDFLAGS $RUBY_LDFLAGS $LIBS $RUBY_LIBS -o conftest${ac_exeext}'
+    if { (eval echo ruby.m4: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+       RUBY_OK=yes
+    else
+        echo "configure: failed program was:" >&5
+        cat conftest.c >&5
+    fi
+    rm -f conftest*
+fi
+
+if test "x${RUBY_OK}" '=' "xyes"; then 
+    AC_MSG_RESULT([yes])
+    AC_SUBST(RUBY_LIBS)
+    AC_SUBST(RUBY_CPPFLAGS)
+    AC_SUBST(RUBY_LDFLAGS)
+else
+    AC_MSG_RESULT([no])
+    RUBY_CPPFLAGS=""
+    RUBY_LDFLAGS=""
+    RUBY_LIBS=""
+fi
+])