trouble building oprofile from devtoolset1.1

Had a bit of trouble the other day building oprofile from devtoolset 1.1.

Google didn't find me anything that helped right out of the box, so in case you get:

RPM build errors:
    File not found: /var/tmp/devtoolset-1.1-oprofile-root/opt/rh/devtoolset-1.1/root/usr/bin/oprof_start

when trying to build devtoolset-1.1-oprofile-0.9.7-6.el5.src.rpm on RHEL5/CentOS5 here is what I ended up doing:

--- oprofile.spec       2013-03-13 09:50:07.730025826 +0900
+++ oprofile.spec.bbh   2013-03-13 09:49:52.557940097 +0900
@@ -124,6 +124,9 @@
 --mandir=%{_mandir} \
 --infodir=%{_infodir} \
 --enable-gui=%{qt_ver} \
+%if 0%{?rhel} < 6
+--with-qt-dir=/usr/lib64/qt-3.3 \
+%endif
 --with-java=/usr/lib/jvm/java

 make CFLAGS="%{optflags}"