URL:
<http://savannah.gnu.org/bugs/?17873>
Summary: .NOTPARALLEL enhancements
Project: make
Submitted by: yost
Submitted on: Wednesday 09/27/2006 at 18:25
Severity: 3 - Normal
Item Group: Enhancement
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Component Version: 3.81
Operating System: Any
Fixed Release: None
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Details:
Today all a makefile can do to influence parallel execution is to mark the
entire makefile as unsafe for -j by mentioning .NOTPARALLEL as a target.
Finer control is needed. The fix should go something like the following.
.NOTPARALLEL
If .NOTPARALLEL is mentioned as a target, then by default the prerequisites
of all targets in this makefile will be built serially, even if the `-j'
option is given. If .NOTPARALLEL is mentioned as a prerequisite of a target,
then subsequent prerequisites of that target will be built serially, even if
the '-j' option is given (and even if .PARALLEL was mentioned previously in
this prerequisite list). (See also 5.4 Parallel Execution and 5.7.3
Communicating Options to a Sub-make.)
.PARALLEL
If .PARALLEL is mentioned as a prerequisite of a target, then subsequent
prerequisites of that target will be built in parallel if the '-j' option is
given, even if .NOTPARALLEL is mentioned as a target (or was mentioned
previously in this prerequisite list). (See also 5.4 Parallel Execution and
5.7.3 Communicating Options to a Sub-make.)
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