Add necessary Makefile.inc1 infrastructure for building on non-FreeBSD
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Authored by arichardson on Aug 7 2020, 3:27 PM.

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Reviewers

emaste
brooks
jhb
imp
bdrewery

Commits

rS364760: Add necessary Makefile.inc1 infrastructure for building on non-FreeBSD

Summary

The most awkward bit in this patch is the bootstrapping of m4:
We can't simply use the host version of m4 since that is not compatible
with the flags passed by lex (at least on macOS, possibly also on Linux).
Therefore we need to bootstrap m4, but lex needs m4 to build but m4 also
depends on lex (which needs m4 to generate any files). To work around this
cyclic dependency we can build a bootstrap version of m4 (with pre-generated
files) then use that to build the real m4.

This patch also changes the xz/unxz/dd tools to always use the host version
since the version in the source tree cannot easily be bootstrapped on macOS
or Linux.

Diff Detail

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Unit

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Build Status

Buildable 32844
Build 30253: arc lint + arc unit

Event Timeline

arichardson requested review of this revision.Aug 7 2020, 3:27 PM

arichardson created this revision.

Harbormaster completed remote builds in B32844: Diff 75566.Aug 7 2020, 3:27 PM

arichardson added a child revision: D16767: Add a tools/build/make.py script that bootstraps bmake and then runs the build.Aug 7 2020, 3:28 PM

arichardson removed a child revision: D16767: Add a tools/build/make.py script that bootstraps bmake and then runs the build.

arichardson added a child revision: D16767: Add a tools/build/make.py script that bootstraps bmake and then runs the build.

This all looks basically sane, subject to my usual worries about it breaking native builds... :) I didn't see anything that would, though.

Makefile.inc1
2351	shouldn't nawk and awk be identical? There won't be a nawk

This revision is now accepted and ready to land.Aug 7 2020, 8:38 PM

arichardson added inline comments.Aug 7 2020, 9:53 PM

Makefile.inc1
2351	Yes, awk installs a mask symlink (LINKS= ${BINDIR}/awk ${BINDIR}/nawk) so this works fine when awk is bootstrapped. This change is not needed for cross builds, only for native builds with strict tmppath since otherwise the nawk symlink is missing. I can't split this into a separate commit if you'd like.

brooks added inline comments.Aug 10 2020, 6:02 PM

Makefile.inc1
1348	Since we're overriding PATH, should we show what we set it to in the diagnostic message?
2251	Is it intended that bin/dd is no longer in `_basic_bootstrap_tools`?

Rebase after D26025/rS364123
Address comment

I plan to commit this later this week together with the other crossbuild patches.

This revision now requires review to proceed.Aug 11 2020, 11:19 PM

Harbormaster completed remote builds in B32933: Diff 75710.Aug 11 2020, 11:19 PM

arichardson added inline comments.Aug 11 2020, 11:20 PM

Makefile.inc1
2251	dd is linked from the host in tools/build/Makefile so it should not be here since otherwise we would attempt to bootstrap it for cross-builds. The build system no longer uses non-portable dd flags so using the host version is fine.
2351	slightly different version of this change committed as D26025/rS364123

brooks accepted this revision.Aug 13 2020, 10:17 PM

brooks added inline comments.

Makefile.inc1
1303	It's weird that we have two styles of adding things to ITOOLS, but this doesn't make anything worse.
1353–1363	Should probably indent all these lines.