How do I build custom rpm in scl environment?

Solution In Progress - Updated -

Issue

  • We are building an RPM that uses DevToolSet-3 (DTS3) for the compilation.
  • What's the recommended way to write its SPEC, in particular the %build section?
  • METHOD A (just the %build section)
%build
cat <<DTS3_EOF_MACRO | scl enable devtoolset-3 --
./configure <...parameters...>
make clean
make
DTS3_EOF_MACRO
  • METHOD B (just the %build section)
%build
. /opt/rh/devtoolset-3/enable
./configure <...parameters...>
make clean
make

Method A is the official way of using scl enable, but it has an annoying drawback: it starts a second shell, and hitting Ctrl-C while a build is running sometimes is not effective (it doesn't kill the rpmbuild).

Method B doesn't have the CTRL-C issue, but I haven't found any RH document approving this methodology.

Environment

  • Red Hat Enterprise Linux 6
  • Developer Toolset 3

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