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.
61d52e6e cmListFileBacktrace: Hide the context-stack implementation detail.
a271f7f1 cmTarget: Simplify CMP0023 message loop.
f4300cd4 cmTarget: Simplify output computation.
65a42849 cmTarget: Store context in stack only if different.
9645cba3 cmListFileContext: Implement EqualityComparable.
52a8d19c cmTarget: Store only cmListFileContext for CMP0023 handling.
59ba1215 cmTarget: Remove needless iteration.
18f810a8 cmListFileContext: Sort by line before file.
e96b5d14 cmListFileContext: Implement LessThanComparable.
7eb0dfa0 cmMakefile: Use std::set::insert API to simplify CMP0054 handling.
f9785e0c cmMakefile: Simplify CMP0054 handling.
e17b5e42 cmMakefile: Add access to the top-level execution context.
1ec1bf9f if(): Test the effect of cmMakefileCall use in elseif() handling.
9b4aefad cmMakefile: Replace deques with vectors.
The backtrace will soon not be implemented in terms of a stack of
cmListFileContext objects. Keep the cmListFileContext in the API
for convenience for now.
The lexical scope counting added by commit v3.2.0-rc1~332^2~1 (Track
nested loop levels in CMake language with a stack of counters,
2014-11-18) forgot to account for scopes popped by error messages about
unclosed scopes. Teach the error handler to pop the lexical scope it
reports as unclosed. Re-order the lexical scope RAII object to be
inside the variable scope RAII object scope so that the lexical scope
is fully closed before we check assertions about variable scopes.
Extend the RunCMake.Syntax test with a case covering this.
013ada80 cmPolicies: Implement PolicyMap in terms of bitset.
be6664c2 cmPolicies: Implement abstraction for PolicyMap.
de211686 Port to static cmPolicies API.
13981f20 cmPolicies: Make all API static.
23e2bcc8 cmPolicies: Remove unused DefinePolicy method.
5641ba4f cmPolicies: Remove unused cmPolicy class.
3de54497 cmPolicies: Loop over all policies using enum constants.
387aff20 cmPolicies: Trivialize GetPolicyStatus method.
dbf680d6 cmPolicies: Use more-direct ID access.
8c204133 cmPolicies: Implement in terms of public API.
e3a8c029 cmPolicies: Make private method file-static.
cb765af0 cmPolicies: Implement short description access with XMacros.
5df267fa cmPolicies: Implement version check with XMacro.
2235cfeb cmPolicies: Implement id to version with XMacro.
05d84388 cmPolicies: Implement id to string conversion with XMacro.
6eaade8a cmPolicies: Introduce XMacro table for policy data.
...
a0836ed9 Port to cmMakefile::GetGlobalGenerator.
cbf143bb cmComputeTargetDepends: Use simpler global generator access.
040491fc cmComputeLinkDepends: Remove unused local generator.
0bb6dbe0 cmMakefile: Extract an accessor for the global generator.
e1bdf5f5 cmMakefile: Use GetCMakeInstance.
efcca935 cmMakefile: Simplify GetCMakeInstance implementation.
Since commit 80909041 (cmMakefile: Disable copy constructor, 2015-04-18)
the only call to cmMakefile::Initialize is in one constructor. Inline
it and drop the separate method.
In commit 86f3cd0f (cmMakefile: Require the localGenerator in the
constructor, 2015-04-27) we added use of GetDefinition to the
Initialize method. Set SuppressWatches before calling this method
since GetDefinition checks it.
b48ea26a cmDefinitions: Invert conditional code.
5ccff640 cmDefinitions: Externalize looping for ClosureKeys.
f79cd99d cmDefinitions: Implement MakeClosure in terms of reverse iterators.
aa4d1ee8 cmDefinitions: Convert MakeClosure into a static method.
60becdc6 cmDefinitions: Implement MakeClosure in terms of a list of ancestors.
d858f363 cmDefinitions: Use list of cmDefinitions* to create closure.
aaaa65b6 cmMakefile: Remove stack adaptor for the VarStack.
f983d891 cmDefinitions: Replace recursion with loop.
24885d4e cmDefinitions: Replace private constructor with MakeClosure.
012a75a0 cmDefinitions: Make ClosureKeys API vector-based.
ca9fa77d cmDefinitions: Inline GetClosureKeys implementation.
78e1454e cmDefinitions: Replace ClosureKeys recursion with looping.
818bf727 cmDefinitions: Change LocalKeys to return a vector.
5067ae41 cmDefinitions: Externalize the Set logic.
60200ca5 cmDefinitions: Add an Erase method.
b43c162e cmMakefile: Use the Internal class to enclose the VarStack.
This reverts commit 242c3966 (add_custom_command: Diagnose
MAIN_DEPENDENCY limitation, 2015-03-09) and the follow up commit
b372a99a (UseSWIG: Do not use MAIN_DEPENDENCY on custom commands,
2015-03-26).
I misdiagnosed the underlying issue that prompted creation of policy CMP0057.
The actual issue surfaces when a single custom command's MAIN_DEPENDENCY
is listed in more than one target; this issue will have to be addressed
independently.
The purpose of the stack is to allow access only to the top of it. Access
to items which are not at the top is needed, so cmDefinitions objects
get a Parent pointer.
The existence of the Parent pointer is a workaround for the inappropriate
use of stack in the first place. Remove it now.
Construct the final list directly in a named return value. Use
a single set to track bindings already found.
Co-Author: Brad King <brad.king@kitware.com>
Create snapshots for buildsystem directories during configure time.
This class will be extended in follow up commits to snapshot
all values in the cmState.
8dc3a67c cmMakefile: Out-of-line the directory methods.
0f3c8cfa cmMakefile: Use method abstraction to access directories.
b288a997 cmMakefile: Rename SetStart* directory API to SetCurrent*.
932d53bc cmMakefile: Remove redundant method duplication.
32b8f03a cmMakefile: Port users of GetStart* methods to new names.
54d6a918 cmMakefile: Rename GetCurrent{Output,Binary}Directory.
55d80d0a cmMakefile: Rename GetCurrent{,Source}Directory.
b23cf06f cmake: Remove redundant start directories.
fcf246ac cmMakefile: Populate Home directories on initialize.
8878bea7 cmake: Initialize Home directories on cmake for find-package mode.
044dc815 Use the Home directories from the cmake class where intended.
d67e8f24 cmake: Fix directory used to find the cache
1ea085d1 cmMakefile: Initialize dir definitions early.
f034bb2f Remove redundant calls to MakeStartDirectoriesCurrent.
3a68c323 cmMakefile: Fix wrong parameter names.
They are maintained as containing the same content as the 'home'
directories, but they are never read from.
Fix some comments and help strings which confused the two by
name. They actually mean what is called CMAKE_SOURCE_DIR in
cmake code.
Call the Internal method with equivalent parameters, passing a null first
argument.
A duplicate path computation exists inside the external_in condition now,
but that is harmless at this point.
Because all external callers of this method pass a null first
parameter, this change has no effect for them.
This also makes it obvious that the CMAKE_PARENT_LIST_FILE is set to
the name of the file being read itself for CMakeLists.txt files,
which may not make any sense.
Global properties are already global in scope, so remove the
overload for specifying it and port users of the API.
The call from cmMakefile::GetProperty can be simplified because
the scope is only used during chaining, and there is no further
chaining after processing global properties.
At this point, it is an interface to the cache. It will be extended
to be a universal interface for access to and manipulation of
configuration-time data (defintions, properties on targets,
directories, source files etc).
This will allow porting all command implementations away
from the cmMakefile and cmTarget classes, and result in something
more-purely related to configuration-time processing of cmake
commands. That should serve at least the following goals:
* Split the CMake implementation more definitively into three
stages: Configuration, computation and generation, and be able to
implement each optimally for memory access patterns etc.
* Make better IDE integration possible by making more configuration
data available.
* Make it possiblte to use a smaller library than CMakeLib.a in
cpack and ctest, resulting in smaller executables.
* Make it possible to run the configure step multiple times in
the same CMake run (#14539).
Manage its lifetime in the cmake class, and add a convenience accessor
to cmMakefile.
This topic was never tested without some follow-up commits. The
GetCacheEntryValue API returns a pointer to memory freed on return.
It will have to be revised along with the rest of the original topic.
Add policy CMP0059 to cover this change. The property has been
deprecated since CMake 2.4 anyway.
This will help clean up cmMakefile -- the DefineFlagsOrig member should
not need to exist.
95dd238f cmRemoveDuplicates: Fix iterator -> const_iterator.
4448f175 cmInstalledFile: Move Property implementation out of line.
7916d7ba Include cmAlgorithms where it is used.
c021f59c cmMakefile: Store macro list in a vector not in a map.
2d130896 cmMakefile: Fix list of macros generation.
f1969234 cmFunctionCommand: Remove ineffectual code.
1116698a cmTarget: Don't needlessly clear vectors in the destructor.
Define an empty string in CMAKE_<LANG>_STANDARD_DEFAULT to mean that
the toolchain has no notion of lanuage standard levels. In this case
the <LANG>_STANDARD[_REQUIRED] properties will have no effect.
Update the RunCMake.CompileFeatures test to exclude the
LinkImplementationFeatureCycle test when there is no standard default.
It can never fail because no use of specific features will adjust the
CXX_STANDARD level required for any target since the standard levels
have no meaning in this case.
65b81da4 cmVariableWatch: Use the cmDeleteAll algorithm with for_each.
30d2de9a cmGeneratorExpressionEvaluator: Replace own algorithm with cmDeleteAll.
4a6e795b Use the cmDeleteAll algorithm instead of trivial raw loops.
abb4a678 Add a generic algorithm for deleting items in a container.
55a73e6b Use the cmJoin algorithm where possible.
8dc8d756 cmStandardIncludes: Add a join algorithm for string containers.
b5813cee cmInstallCommand: Remove unused variable.
With PushScope and PopScope, keeping track of another bit of data for
each scope isn't easy. Instead, store it as another CMake variable so it
gets implicitly tracked along with everything else.
This works in a revert of commit
7d674b5f0b.
Provide options to fail without blocking or to block up to a timeout.
Provide options to specify the scope containing the lock so it can be
released automatically at the end of a function, file, or process.
Extend the RunCMake.file test with cases covering the file(LOCK) command
usage and error cases.
This reverts commit v3.1.0-rc1~557^2~2 (ClearMatches: Only clear matches
which were actually set, 2014-03-12). The optimization did not track
the match count in the same scope as the variables, allowing possible
inconsistency.
Resolve conflicts in Source/cmIfCommand.cxx, Source/cmMakefile.cxx,
and Source/cmMakefile.h by moving the changes to the new location
of the code involved.
It gets incremented while entering a loop block (e.g. foreach or while)
and gets decremented when leaving the block. Because scope borders for
example at function borders must be taken into account the counter is
put into a stack. With every new scope an empty counter is pushed on the
stack, when leaving the scope the original value is restored.
This will allow easy querying if the break command is properly nested
within a loop scope.
Signed-off-by: Gregor Jasny <gjasny@googlemail.com>
A common idiom in CMake-based build systems is to have custom commands
that generate files not listed explicitly as outputs so that these
files do not have to be newer than the inputs. The file modification
times of such "byproducts" are updated only when their content changes.
Then other build rules can depend on the byproducts explicitly so that
their dependents rebuild when the content of the original byproducts
really does change.
This "undeclared byproduct" approach is necessary for Makefile, VS, and
Xcode build tools because if a byproduct were listed as an output of a
rule then the rule would always rerun when the input is newer than the
byproduct but the byproduct may never be updated.
Ninja solves this problem by offering a 'restat' feature to check
whether an output was really modified after running a rule and tracking
the fact that it is up to date separately from its timestamp. However,
Ninja also stats all dependencies up front and will only restat files
that are listed as outputs of rules with the 'restat' option enabled.
Therefore an undeclared byproduct that does not exist at the start of
the build will be considered missing and the build will fail even if
other dependencies would cause the byproduct to be available before its
dependents build.
CMake works around this limitation by adding 'phony' build rules for
custom command dependencies in the build tree that do not have any
explicit specification of what produces them. This is not optimal
because it prevents Ninja from reporting an error when an input to a
rule really is missing. A better approach is to allow projects to
explicitly specify the byproducts of their custom commands so that no
phony rules are needed for them. In order to work with the non-Ninja
generators, the byproducts must be known separately from the outputs.
Add a new "BYPRODUCTS" option to the add_custom_command and
add_custom_target commands to specify byproducts explicitly. Teach the
Ninja generator to specify byproducts as outputs of the custom commands.
In the case of POST_BUILD, PRE_LINK, and PRE_BUILD events on targets
that link, the byproducts must be specified as outputs of the link rule
that runs the commands. Activate 'restat' for such rules so that Ninja
knows it needs to check the byproducts, but not for link rules that have
no byproducts.
Teach the add_custom_command and add_custom_target commands a new
USES_TERMINAL option. Use it to tell the generator to give the command
direct access to the terminal if possible.
d1b62185 Merge branch 'parent-scope-tests' into variable-pull-failure
5f414cef Revert "cmDefinitions: Don't store parent lookups"
e0c0b1ac test: add a test for PARENT_SCOPE with multiple scopes
064c415d test: add test for PARENT_SCOPE behavior
This reverts commit 5abfde6cb8.
The behaviors associated with implicit pulldown on variable lookup
seriously conflict with the optimizations made in these commits.
Basically, since values were copied upon variable lookup, not just on
PARENT_SCOPE, coupled with PARENT_SCOPE's behavior based on whether the
variable is in the current scope or not causes serious problems with not
storing a value for every variable at every scope.
The commit changed behavior of the following example, among other cases:
function(test_set)
set(blah "value2")
message("before PARENT_SCOPE blah=${blah}")
set(blah ${blah} PARENT_SCOPE)
message("after PARENT_SCOPE blah=${blah}")
endfunction()
set(blah value1)
test_set()
message("in parent scope, blah=${blah}")
Reported-by: Alex Merry <alex.merry@kde.org>
Reported-by: Ben Cooksley <bcooksley@kde.org>
858d5a0b Fix if() checks of CMAKE_SYSTEM_NAME on Cygwin
e177e7af FPHSA: Avoid if() dereferencing of quoted variable
425acc52 cmcurl: Use if(DEFINED) to simplify conditions
cede5cbd libarchive: Avoid depending on if() to dereference a quoted variable
2d97178b FindGTK2: Avoid depending on if() to dereference a quoted variable
0b12815d Modules/Test*.cmake: Use if(DEFINED) to simplify conditions
188a1f23 If: Introduce policy CMP0054 - don't dereference quoted variables in if()
b900c1cc If: Extract cmConditionEvaluator from if() implementation
Reject the option by default. It will be implemented on a per-generator
basis. Pass the setting into try_compile project generation. Add cache
entry CMAKE_GENERATOR_PLATFORM and associated variable documentation to
hold the value persistently.
Add a RunCMake.GeneratorPlatform test to cover basic use cases for the
option. Verify that CMAKE_GENERATOR_PLATFORM is empty by default, and
that it is rejected when the generator does not support a user setting.
No call sites pass NULL to the output argument, so take it by
reference to avoid the if(output) conditions. Propagate the
change through the TryCompile APIs that call it.
When CMP0053 is in WARN mode, variables get expanded twice, leaking the
fact that the string was expanded twice and changing behavior. Instead,
suppress variable watches when running the expansion to trigger the
CMP0053 warning.
The ALLOWED_UNKNOWN_VARIABLE_READ_ACCESS access type was switched on an
undocumented variable and its lookup caused an unnecessary performance
impact. Remove it.
Allow setting build properties based on the features available
for a target. The availability of features is determined at
generate-time by evaluating the link implementation.
Ensure that the <LANG>_STANDARD determined while evaluating
COMPILE_FEATURES in the link implementation is not lower than that
provided by the INTERFACE of the link implementation. This is
similar to handling of transitive properties such as
POSITION_INDEPENDENT_CODE.
Add properties and variables corresponding to CXX equivalents.
Add features for c_function_prototypes (C90), c_restrict (C99),
c_variadic_macros (C99) and c_static_assert (C11). This feature
set can be extended later.
Add a <PREFIX>_RESTRICT symbol define to WriteCompilerDetectionHeader
to conditionally represent the c_restrict feature.
Introduce a new implementation of ExpandVariablesInString and select
between the old and new implementations based on policy CMP0053.
Instead of cmCommandArgumentParserHelper, use a custom parser with our
own stack. This is much faster and works well for our simple grammar.
The new behavior of CMP0053 should expand @VAR@ syntax only in certain
contexts. All existing EVIS callers use "replaceAt == true" so
hard-code our call to the old implementation. Update the signature to
default to "replaceAt == false" and pass "replaceAt == true" explicitly
in the call sites for configure_file and string(CONFIGURE).
Testing the configure (no generate) step with ParaView shows ~20%
performance improvement.
In terms of complete configure/generate steps, further testing with
ParaView shows a 20% performance improvement over 2.8.12.2 with Unix
Makefiles and minimal with Ninja. Ninja is less because it generate step
is the expensive part (future work will address this) by a long shot and
these changes help the configure step for the most part.
3f517522 StoreMatches: Minor cleanups
ef62fbad ClearMatches: Store match variable names statically
f718b30a ClearMatches: Only clear matches which were actually set
ClearMatches was clearing many variables which were never set in the
first place. Instead, store how many matches were made last time and
only clear those. It is moved to the cmMakefile class since it is a
common utility used by multiple commands.
Users of the new target_compile_features command are expected to
check the existence of the CMAKE_CXX_COMPILE_FEATURES variable before
attempting to use it to require features.
Stephen Kelly
Brad King
Nils Gladitz
Bill Hoffman
Ben Boeckel
Ruslan Baratov
Gregor Jasny
Peter Collingbourne