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-rw-r--r--ext/tcltklib/README.1st7
1 files changed, 7 insertions, 0 deletions
diff --git a/ext/tcltklib/README.1st b/ext/tcltklib/README.1st
index 14c56fd410..fe965e04d0 100644
--- a/ext/tcltklib/README.1st
+++ b/ext/tcltklib/README.1st
@@ -29,5 +29,12 @@ directry of Ruby sources, please try something like as the followings.
$ rm Makefile
$ CONFIGURE_ARGS='--with-tcl-include=/usr/local/include/tcl8.3/ --with-tcllib=tcl8.3 --with-tklib=tk8.3 --enable-tcltk_stubs' ruby extconf.rb
+
+ *** ATTENTION ***
+If your Tcl/Tk libraries are compiled with "pthread support", Ruby/Tk
+may cause "Hang-up" or "Segmentation Fault" frequently. To avoid this
+trouble, please try to use the '--with-pthread-ext' option of the
+'configure' command and re-compile Ruby sources.
+
==========================================================
Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)