Don't pay a penalty for it in all GetProperty calls.
Additionally, the storage of properties will eventually move to
cmState, which should only contain state and not logic for policies
like this.
The chaining logic doesn't belong to the container, and the
CMakeInstance pointer doesn't need to be in cmPropertyMap.
Size goes from 56 to 48 bytes with GNU libstdc++-5.1.
7657e8b1 cmMakefile: Introduce a local cmMakefile variable.
4e8f242d cmMakefile: Store unconfigured cmMakefiles.
d65e0123 cmMakefile: Implement ConfigureSubDirectory in terms of cmMakefile.
f059ed16 cmMakefile: Move Configure responsibility from cmLocalGenerator.
a653611d cmake: Replace CurrentLocalGenerator concept with CurrentMakefile.
69a038a9 cmMakefile: Refactor directories specified with the subdirs command.
08637970 cmLocalGenerator: ComputeObjectMaxPath just before generating.
27e11c6f Merge Configure state with GeneratingBuildSystem state.
363caa2f cmLocalGenerator: De-virtualize Configure().
eb7b6f6d cmVariableWatchCommand: Simplify error reporting.
499ebb65 cmListFileBacktrace: Internalize the step of making paths relative.
80b433b0 cmGlobalGenerator: Don't use else after a return.
52919ac8 cmMakefile: Make cmListFileBacktrace default constructible.
b68f2ea8 cmMakefile: Add API for elseif to create backtrace.
17e13f0a cmMakefile: Simplify CMP0000 handling.
Compute deterministic GUIDs that are unique to the build tree by
hashing the path to the build tree with the GUID logical name.
Avoid storing them in the cache, but honor any found there.
This will allow project GUIDs to be reproduced in a fresh build
tree so long as its path is the same as the original, which may
be useful for incremental builds.
3b880a07 cmLocalGenerator: Require a valid cmState::Snapshot in the ctor.
e12afe76 cmState: Host some state from the cmGlobalGenerator.
c7b79aa1 cmGlobalGenerator: Require a cmake instance in ctor.
01e1cd5c cmState: Move snapshot creation to the cmake instance.
Refactor the local generator creation API to accept a
cmState::Snapshot. Adjust MakeLocalGenerator to use the 'current'
snapshot in cases where there is no parent. Create the snapshot
for subdirectories in cmMakefile::AddSubdirectory.
This means that snapshots are now created at the point of extending the tree,
as appropriate, and independently of the cmLocalGenerator and cmMakefile they
represent the state for.
In cmMakefile::PushScope, a copy of the closure of keys initialized
in the parent scope is made. In PopScope, essentially the same copy
is inserted back into the parent. That means a lot of duplication
of strings and a lot of string comparisons. None of it is needed,
because the cmDefinitions keys already provide a canonical
representation of what is initialized.
The removal of the separate container also makes the variable handling
code more easy to reason about in general.
Before this patch, configuring llvm uses 200 KiB for the VarInitStack.
Overall peak memory consumption goes from 35.5 MiB to 35.1 MiB.
Presumably the intention here is to attempt to optimize memory by not
storing what is not needed. However, all keys need to be tracked
anyway to implement initialization tracking, and this special case
gets in the way of simplifying the implementation of that.
This doesn't change any observable effects because values set
to 0 are considered not to exist by the cmDefinitions API.
Stephen Kelly
Brad King