# Compiling QtRuby **URL:** \ **Category:** Ruby\ **Created:** [March 29, 2006, 3:58pm UTC](https://www.ruby-forum.com/t/compiling-qtruby/89958 "2006-03-29T15:58:07Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![hector](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/43a26b/32.png) [@hector](https://www.ruby-forum.com/u/hector)\ **Post date:** [March 29, 2006, 3:58pm UTC](https://www.ruby-forum.com/t/compiling-qtruby/89958/1 "2006-03-29T15:58:07Z")
I’ve been trying to compile Qt Ruby without success. I’ve got Qt 4.1.1 installed and it tested fine. I was able to run the demos without a problem. When I try to compile qt4-qtruby-1.4.3 I get this: -c -o qtrubyinit.o `test -f 'qtrubyinit.cpp' || echo './'`qtrubyinit.cpp; \ then mv ".deps/qtrubyinit.Tpo" ".deps/qtrubyinit.Po"; \ else rm -f ".deps/qtrubyinit.Tpo"; exit 1; \ fi /bin/sh ../../libtool --silent --mode=link g++ -Wnon-virtual-dtor -Wno-long-long -Wundef -ansi -D\_XOPEN\_SOURCE=500 -D\_BSD\_SOURCE -Wcast-align -Wconversion -Wchar-subscripts -Wall -W -Wpointer-arith -O2 -g -O2 -Wformat-security -Wmissing-format-attribute -fno-exceptions -fno-check-new -fno-common -o qtrubyinit -module -L/usr/local/Trolltech/Qt-4.1.1/lib -L/usr/X11R6/lib -version-info 0:0:0 -L../../smoke/qt/ -L/usr/local/lib qtrubyinit.o -lQtGui -lz -lpng -lz -lm -lXext -lX11 -lSM -lICE -lpthread -Wl,-R -Wl,/usr/local/lib -L/usr/local/lib -L. ../../smoke/qt/libsmokeqt.la ../../qtruby/rubylib/qtruby/libqtrubyinternal.la libtool: link: warning: `-version-info' is ignored for programs qtrubyinit.o: In function `main': /source/qt4-qtruby-1.4.3/qtruby/bin/qtrubyinit.cpp:25: undefined reference to `ruby_init' /source/qt4-qtruby-1.4.3/qtruby/bin/qtrubyinit.cpp:26: undefined reference to `ruby\_script' /source/qt4-qtruby-1.4.3/qtruby/bin/qtrubyinit.cpp:27: undefined reference to `ruby_options' /source/qt4-qtruby-1.4.3/qtruby/bin/qtrubyinit.cpp:28: undefined reference to `ruby\_run' collect2: ld returned 1 exit status make[3]: \*\*\* [qtrubyinit] Error 1 make[3]: Leaving directory `/source/qt4-qtruby-1.4.3/qtruby/bin' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/source/qt4-qtruby-1.4.3/qtruby' make[1]: \*\*\* [all-recursive] Error 1 make[1]: Leaving directory `/source/qt4-qtruby-1.4.3' make: \*\*\* [all] Error 2 I know almost nothing about compiling C++ programs, does anyone know how I can get around this problem. Thank you. Hector ---
**Author:** ![hector](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/43a26b/32.png) [@hector](https://www.ruby-forum.com/u/hector)\ **Post date:** [March 31, 2006, 9:01pm UTC](https://www.ruby-forum.com/t/compiling-qtruby/89958/2 "2006-03-31T21:01:56Z")
Hector wrote: > I’ve been trying to compile Qt Ruby without success. > I’ve got Qt 4.1.1 installed and it tested fine. I was able to run the > demos without a problem. > > When I try to compile qt4-qtruby-1.4.3 I get this: > > -c -o qtrubyinit.o `test -f 'qtrubyinit.cpp' || echo './'`qtrubyinit.cpp; \ then mv ".deps/qtrubyinit.Tpo" ".deps/qtrubyinit.Po"; \ else rm -f ".deps/qtrubyinit.Tpo"; exit 1; \ fi /bin/sh ../../libtool --silent --mode=link g++ -Wnon-virtual-dtor -Wno-long-long -Wundef -ansi -D\_XOPEN\_SOURCE=500 -D\_BSD\_SOURCE -Wcast-align -Wconversion -Wchar-subscripts -Wall -W -Wpointer-arith -O2 -g -O2 -Wformat-security -Wmissing-format-attribute -fno-exceptions -fno-check-new -fno-common -o qtrubyinit -module -L/usr/local/Trolltech/Qt-4.1.1/lib -L/usr/X11R6/lib -version-info 0:0:0 -L../../smoke/qt/ -L/usr/local/lib qtrubyinit.o -lQtGui -lz -lpng -lz -lm -lXext -lX11 -lSM -lICE -lpthread -Wl,-R -Wl,/usr/local/lib -L/usr/local/lib -L. ../../smoke/qt/libsmokeqt.la ../../qtruby/rubylib/qtruby/libqtrubyinternal.la libtool: link: warning: `-version-info' is ignored for programs qtrubyinit.o: In function `main': /source/qt4-qtruby-1.4.3/qtruby/bin/qtrubyinit.cpp:25: undefined reference to `ruby_init' /source/qt4-qtruby-1.4.3/qtruby/bin/qtrubyinit.cpp:26: undefined reference to `ruby\_script' /source/qt4-qtruby-1.4.3/qtruby/bin/qtrubyinit.cpp:27: undefined reference to `ruby_options' /source/qt4-qtruby-1.4.3/qtruby/bin/qtrubyinit.cpp:28: undefined reference to `ruby\_run' collect2: ld returned 1 exit status make[3]: \*\*\* [qtrubyinit] Error 1 make[3]: Leaving directory `/source/qt4-qtruby-1.4.3/qtruby/bin' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/source/qt4-qtruby-1.4.3/qtruby' make[1]: \*\*\* [all-recursive] Error 1 make[1]: Leaving directory `/source/qt4-qtruby-1.4.3' make: \*\*\* [all] Error 2 > > I know almost nothing about compiling C++ programs, does anyone know how > I can get around this problem. > > Thank you. > > Hector A question from a non-Qt user. Does Qt Ruby try to match version numbers with Qt. For example is qt-qtruby-1.4.3 meant to be used with any qt-1.4.x ? Was your compilation from a \*.tar.gz file? or did it come from installing a \*.gem file?