Since commit v3.4.0-rc1~321^2~2 (Genex: Store a backtrace, not a pointer
to one, 2015-07-08) we treat cmListFileBacktrace instances as
lightweight values. This was true at the time only because the
backtrace information was kept in the cmState snapshot hierarchy.
However, that forced us to accumulate a lot of otherwise short-lived
snapshots just to have the backtrace fields available for reference by
cmListFileBacktrace instances. Recent refactoring made backtrace
instances independent of the snapshot hierarchy to avoid accumulating
short-lived snapshots. This came at the cost of making backtrace values
heavy again, leading to lots of string coying and slower execution.
Fix this by refactoring cmListFileBacktrace to provide value semantics
with efficient shared storage underneath. Teach cmMakefile to maintain
its call stack using an instance of cmListFileBacktrace. This approach
allows the current backtrace to be efficiently saved whenever it is
needed.
Also teach cmListFileBacktrace the notion of a file-level scope. This
is useful for messages about the whole file (e.g. during parsing) that
are not specific to any line within it. Push the CMakeLists.txt scope
for each directory and never pop it. This ensures that we always have
some context information and simplifies cmMakefile::IssueMessage.
Push/pop a file-level scope as each included file is processed. This
supersedes cmParseFileScope and improves diagnostic message context
information in a few places. Fix the corresponding test cases to expect
the improved output.
Rename methods:
* `cmMakefile::Find{ => LocalNonAlias}Target`
* `cmLocalGenerator::Find{ => LocalNonAlias}GeneratorTarget`
These names clarify that they are for directory-local target names
and do not consider alias targets.
Refactoring in commit v3.5.0-rc1~272^2~11 (cmTarget: Implement ALIAS in
terms of name mapping, 2015-10-25) accidentally introduced logic that
assumes ALIAS targets always reference targets in their own directory.
Fix this and add a test case.
The configure-step fix is that `cmMakefile::FindTarget` should not consider
aliases. The purpose of this method is just to look up targets local to
a directory. Since ALIAS and normal targets share a namespace we know a
locally defined target will never collide with an ALIAS target anyway.
The method has 3 call sites, and this change is safe for all of them:
* `cmInstallCommand::HandleTargetsMode`: Rejects aliases before the call.
* `cmFLTKWrapUICommand::FinalPass`: Should never have considered aliases.
* `cmMakefile::FindTargetToUse`: Falls back to a global lookup anyway.
The generate-step fix is that `cmLocalGenerator::FindGeneratorTarget`
should not consider aliases. This method is the generate-step
equivalent to the above. The method has 2 call sites, and this change
is safe for both of them:
* `cmInstallTargetGenerator::Compute`: Never uses an alias target name.
* `cmLocalGenerator::FindGeneratorTargetToUse`: Falls back to global lookup.
Reported-by: Matteo Settenvini <matteo@member.fsf.org>
Make the message suppression more consistent, by adding a check
for the message related CMake variables in cmake::IssueMessage,
which allows callers of IssueMessage other than the message
command to behave as expected. Also added a check for
CMAKE_SUPPRESS_DEVELOPER_WARNINGS in the message command to
mirror the deprecated message type behaviour.
Added a 'force' flag to the cmake::IssueMessage method, to
make the message suppression consistent, when setting the
message related CMake variables directly in a CMake file.
Expand message command tests to cover the AUTHOR_WARNING message
type as well.
The PolicyPushPop constructor arguments and Quiet method were used to
pass non-default arguments to PushPolicy and PopSnapshot, but no clients
use them anymore.
The `PopPolicyBarrier` method is actually responsible for closing any
scope opened by creating a snapshot. Rename it to `PopSnapshot` and add
a comment explaining the purpose of the poilcy-scope-specific part of
the method.
c0969b10 cmMakeDepend: Inline into inheriting class.
6a1e7328 cmMakeDepend: Inline into only user.
00f50b00 cmMakeDepend: Inline into header.
3df749af Remove vestigial declarations.
3029c27e cmMakeDepend: Use public cmMakefile API.
Commit v3.4.0-rc1~494^2~4 (cmMakefile: Add API for elseif to create
backtrace., 2015-05-29) removed the use of cmMakefileCall to push/pop
execution context in favor of a new way to create backtraces.
However, a call to cmMakefile::GetExecutionContext is still invoked to
issue a contextual CMP0054 warning through cmConditionEvaluator. As
the elseif is not part of the call stack, this resulted in trying to
access an empty vector.
Avoid the attempt at getting execution context when evaluating elseif by
constructing a context and backtrace on behalf of the cmConditionEvaluator
in all cases.
2293d43d cmLocalGenerator: Store cmGeneratorTargets.
488723f5 cmMakefile: Store container of cmExportBuildFileGenerators.
15834405 cmGeneratorExpression: Port interface to cmGeneratorTarget.
11165525 cmGeneratorExpression: Port to cmLocalGenerator.
Set a cmLocalGenerator on each instance at compute time. That will
soon be needed to access cmGeneratorTarget instances.
If a cmExportBuildFileGenerator is processed early during configure time as a
result of CMP0024 it must be removed from the list to process later at generate
time.
57f03e59 Port some of the cmExportFileGenerator API to cmGeneratorTarget.
57ab0f70 Port cmExportBuildFileGenerator to cmGeneratorTarget.
570938cb cmExportTryCompileFileGenerator: Create cmGeneratorTargets.
ec38e4c8 Move GetFullPath to cmGeneratorTarget
dfb025bf Move GetLocationForBuild to cmGeneratorTarget.
9f2dca80 Move GetLocation to cmGeneratorTarget.
c7a8e74b Always access target location from a cmGeneratorTarget instance.
5b60eaf6 cmTarget: Restore the ImportedGetLocation method.
50b17a61 cmIncludeCommand: Populate the cmGeneratorTargets in deprecated path.
ba266858 cmTarget: Create cmGeneratorTargets before reading deprecated LOCATION.
5ab3a946 cmTarget: Inline GetLocation into deprecated callers.
496f4cd0 cmGlobalGenerator: Create cmGeneratorTargets before QtAutomoc.
de80993a cmGlobalGenerator: Create cmGeneratorTargets earlier.
611220f7 cmTarget: Use reliable test for CMP0024 and CMP0026 OLD.
bbad6ba5 cmLocalGenerator: Remove unused AddCustomCommandToCreateObject method.
e4dc83ad cmLocalGenerator: Remove unused AddBuildTargetRule method.
...
8329fc01 cmPolicies: Replace unused include.
5447ca1a cmMakefile: Remove CMP0001 handling to callers.
d0dcce15 cmMakefile: Simplify computation of ancient policy status.
658bfc5c cmMakefile: Remove redundant condition from policy status computation.
f4a25874 cmMakefile: Inline internal policy status method.
3c45471c cmPolicies: Enable RVO for internal method.
71e69fc9 cmPolicies: Store only state that users can set.
84e18056 cmMakefile: Convert recursion to loop.
Brad King
Michael Scott
Stephen Kelly
Gregor Jasny