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Subject: [Boost-build] multiple variant builds
From: Jess Peterson (jess_at_[hidden])
Date: 2014-11-13 08:15:25

For simplicity let us say that I want to build two concrete targets, one
for linux, and one cross-compiled for windows. To that end, I have two gcc
inits, one using the default compiler and one using gcc-mingw32. If I run
b2 twice, both work:

  b2 toolset=gcc
  b2 toolset=gcc-mingw32 target-os=windows

How do I run them together?

If I use:
  b2 toolset=gcc toolset=gcc-mingw32 target-os=windows
it builds the two desired targets but also tries for gcc with windows flags
and gcc-mingw32 with linux flags.

I do not see a way to specify that a given gcc toolset should only be used
for a particular target-os (e.g putting <target-os>windows in the options.

I tried what was in Vladimir's Boost.Build System paper:
  b2 toolset=gcc -- toolset=gcc-mingw32 target-os=windows
but that only builds whatever comes before the dashdash.

Any ideas?

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