URL:
<https://savannah.gnu.org/bugs/?56778>
Summary: 'define' ... 'endef' serializes sub-make invocations
Project: make
Submitted by: masahiroy
Submitted on: Tue 20 Aug 2019 04:31:17 AM UTC
Severity: 3 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: None
Operating System: None
Fixed Release: None
Triage Status: None
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Details:
I think 'define' ... 'endef' is useful
to macrofy a long recipe and to re-use it
in other places.
I attached 4 simple Makefile examples.
"make -f Makefile1" and "make -f Makefile2"
work equivalently for me.
However, Makefile3 and Makefile4 gave me
different results if a parallel build option
is given.
"make -j8 -f Makefile3" is fine, but
"make -j8 -f Makefile4" shows
warning: jobserver unavailable: using -j1. Add '+' to parent make rule.
So, if a macro contains invocations of sub-make,
it turns off parallel building for sub-make.
Is this a specification?
I just wondered why Makefile3 and Makefile4
work differently.
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File Attachments:
-------------------------------------------------------
Date: Tue 20 Aug 2019 04:31:17 AM UTC Name: Makefile1 Size: 43B By:
masahiroy
<http://savannah.gnu.org/bugs/download.php?file_id=47366>
-------------------------------------------------------
Date: Tue 20 Aug 2019 04:31:17 AM UTC Name: Makefile2 Size: 77B By:
masahiroy
<http://savannah.gnu.org/bugs/download.php?file_id=47367>
-------------------------------------------------------
Date: Tue 20 Aug 2019 04:31:17 AM UTC Name: Makefile3 Size: 141B By:
masahiroy
<http://savannah.gnu.org/bugs/download.php?file_id=47368>
-------------------------------------------------------
Date: Tue 20 Aug 2019 04:31:17 AM UTC Name: Makefile4 Size: 175B By:
masahiroy
<http://savannah.gnu.org/bugs/download.php?file_id=47369>
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<https://savannah.gnu.org/bugs/?56778>
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