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Author	SHA1	Message	Date
Guillem Jover	887fb40f3f	MT#61993 build: Force recursive variables into simple ones Starting with GNU make 4.4, build time have massively regressed where before they would take 5m on amd64 now can take 2h40m. While this seems clearly broken, the release notes are filled with notices for breaking changes, and in particular the one for passing all make variables down to the invoked programs executed via the «shell» GNU make function, so it is not clear what is expected breakage and what is not. This has been reported in Debian, but not yet upstream, and while it seems like a clear regression, it's not clear what will be the upstream take on it. For now apply workarounds that do not change semantics, and which do not regress with older GNU make versions. Use the GNU make «origin» function instead of «?=» which defaults to defining a variable as a recursive one. Coerce already defined variables into simple ones to avoid GNU make re-evaluating these variables for each «shell» function invocation. Ref: https://bugs.debian.org/1092051 Change-Id: I076fc05dd616918473a22e7e942fecfdc9851d47	11 months ago
Richard Fuchs	369e64f9a7	TT#14008 add mqtt support Change-Id: Ica4a3e4ef58eadf3feca44ea63f2308103b3146f	5 years ago

Author

SHA1

Message

Date

Guillem Jover

887fb40f3f

MT#61993 build: Force recursive variables into simple ones

Starting with GNU make 4.4, build time have massively regressed
where before they would take 5m on amd64 now can take 2h40m. While this
seems clearly broken, the release notes are filled with notices for
breaking changes, and in particular the one for passing all make
variables down to the invoked programs executed via the «shell» GNU make
function, so it is not clear what is expected breakage and what is not.

This has been reported in Debian, but not yet upstream, and while it
seems like a clear regression, it's not clear what will be the upstream
take on it. For now apply workarounds that do not change semantics, and
which do not regress with older GNU make versions.

Use the GNU make «origin» function instead of «?=» which defaults to
defining a variable as a recursive one. Coerce already defined variables
into simple ones to avoid GNU make re-evaluating these variables for
each «shell» function invocation.

Ref: https://bugs.debian.org/1092051
Change-Id: I076fc05dd616918473a22e7e942fecfdc9851d47

11 months ago

Richard Fuchs

369e64f9a7

TT#14008 add mqtt support

Change-Id: Ica4a3e4ef58eadf3feca44ea63f2308103b3146f

5 years ago

2 Commits (bb2bf3a7026e7f7912dffa3ae8ea0e1ef3f29f31)