Gregory Szorc 9e26b9fde3 Bug 1412932 - Switch to PGO build in Makefile.in; r=ted
Previously, client.mk made the decision of whether to perform a PGO
build. This required passing around MOZ_PGO and invoking a separate
make target if this variable was set.

In this commit, we move this logic to Makefile.in. We employ a special
mechanism in rules.mk to override the default make target so
`make` evaluates "profiledbuild" if MOZ_PGO is set. This also
required using an explicit target for $(MAKE) invocations inside
the "profiledbuild" rule to avoid infinite recursion.

MozReview-Commit-ID: 8sHiVspMisM

--HG--
extra : rebase_source : 76c8a0c592015802f2b9ad52fe2001012a4611f6
extra : source : 24e28b37fbc0ad55ee449699e09c62042af41b55
2017-11-07 16:38:39 -08:00

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