Commit Graph

43 Commits

Author SHA1 Message Date
Stephen Kelly c4ae157865 Genex: Port some access API to cmGeneratorTarget. 2015-10-15 22:40:56 +02:00
Stephen Kelly 1583440509 cmGeneratorExpression: Port interface to cmGeneratorTarget. 2015-10-12 23:07:46 +02:00
Stephen Kelly 11165525ba cmGeneratorExpression: Port to cmLocalGenerator. 2015-10-12 23:07:46 +02:00
Stephen Kelly fc1c7cf85d Genex: Store a backtrace, not a pointer to one.
The storage of a pointer means that the ownership and lifetime are
externally determined, which is harder to reason about. It also imposes
API constraints, requiring APIs to return references to backtraces.

This pointer storage was introduced in commit v3.1.0-rc1~425^2~3 (genex:
remove the need for backtraces, 2014-05-23).  As backtraces are now cheap
to copy around, just do that instead.
2015-07-17 22:14:37 +02:00
Stephen Kelly 80b9f0cbe2 Genex: Extract an evaluateWithContext method.
Make it easier to make modifications to the context before
evaluating with it.
2015-03-10 21:19:38 +01:00
Stephen Kelly e387ce7d68 Genex: Add a COMPILE_LANGUAGE generator expression. 2015-03-07 13:19:45 +01:00
Stephen Kelly b80557c7bd file(GENERATE): Evaluate early to allow generating source files
The evaluation files must be known before cmTargetTraceDependencies
attempts to find them, but we must actually generate the files after
cmTargetTraceDependencies, as that can add to target SOURCES.  The
limitation is that the generated output name must not depend on the
SOURCES of a target if the generated file is used by that target.

Mark the output files as GENERATED so that trace dependencies does
not expect them to already exist in the filesystem.

Move the invokation of ForceLinkerLanguage in the Generate logic
to after the generated file names are known.  ForceLinkerLanguage
tries to determine the sources of a target (in order to determine
an already-known language) and otherwise fails to get information
about the generated file.

Test that the output of file(GENERATE) can be used as a target source
file and that accessing the target SOURCES in the name of the output
file is an error.  Accessing the TARGET_OBJECTS would be a similar
error if it was legal to use that generator expression in this
context.  That is not currently possible and is a different error
condition, so test the current error output as a reminder to change
the expected output if that becomes possible in the future.  Test
that generated rule files resulting from cmTargetTraceDependencies
appear in the SOURCES generated in the output file.
2014-11-12 22:36:45 +01:00
Brad King 807e4ffeef Genex: Track whether an expression depends on the 'head' target 2014-07-21 13:02:22 -04:00
Ben Boeckel a08292059e genex: remove the need for backtraces
Rather than making dummy backtraces and passing them around, just make
backtraces optional.
2014-06-05 12:44:18 -04:00
Stephen Kelly 0dfe395e3c Features: Add COMPILE_FEATURES generator expression.
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.
2014-05-21 17:22:32 +02:00
Stephen Kelly 5de63265e3 Genex: Only evaluate TARGET_OBJECTS to determine target sources.
The output of this expression may contain macros for IDEs to replace
such as $(Configuration), $(CURRENT_ARCH) etc.  To avoid generating
content which is not usable in other contexts, report an error if
there is an attempt to use it in other contexts.

This commit may be reverted in the future if a solution to the
above difference is implemented.
2014-04-02 23:12:57 +02:00
Stephen Kelly 2e0611f981 cmGeneratorExpression: Remove unused include. 2014-03-17 15:29:49 +01:00
Ben Boeckel 84fdc9921c stringapi: Pass configuration names as strings 2014-03-08 13:05:36 -05:00
Ben Boeckel cfc2cf9559 cmGeneratorExpression: Tokenize over strings 2014-03-08 13:05:36 -05:00
Ben Boeckel 270eb96df0 strings: Remove cmStdString references
Casts from std::string -> cmStdString were high on the list of things
taking up time. Avoid such implicit casts across function calls by just
using std::string everywhere.

The comment that the symbol name is too long is no longer relevant since
modern debuggers alias the templates anyways and the size is a
non-issue since the underlying methods are generated since it's
inherited.
2014-03-08 13:05:35 -05:00
Stephen Kelly c4373b33b2 cmTarget: Make GetProperty() const.
This has follow-on effects for other methods and classes. Further
work on making the use of const cmTarget pointers common can be
done, particularly with a view to generate-time methods.
2013-10-31 14:52:11 +01:00
Stephen Kelly cfae430133 Genex: Rename cmGeneratorExpression::NeedsParsing to NeedsEvaluation 2013-08-29 17:53:31 +02:00
Stephen Kelly d777b8e716 Genex: Allow relative paths in INSTALL_INTERFACE.
These paths can be prepended with the ${_IMPORT_PREFIX} generated
in the export file.

Such relative paths were previously an error.
2013-07-25 14:31:22 +02:00
Brad King 57072c12d2 Merge topic 'interface-property-external-read'
8dfdf1c Fix the tests for evaluating includes and defines.
98a6725 Fix constness of accessors.
7e70744 Expand includes and defines transitively in 'external' genexes.
d1a2729 Fix DAG checker finding cycling dependencies.
e72eaad Workaround broken code where a target has itself in its link iface.
ec2c67b Strip stray semicolons when evaluating generator expressions.
2013-02-25 13:12:12 -05:00
Stephen Kelly f2ab17d4db Keep track of all targets seen while evaluating a genex.
As dependencies of the generator expression, these will re-exported
in try_compile generated code.
2013-02-22 08:35:29 -05:00
Stephen Kelly ec2c67bcf3 Strip stray semicolons when evaluating generator expressions. 2013-02-18 12:07:32 +01:00
Stephen Kelly d4e5c6787c Don't keep track of content determined by target property values.
This tracking was added during the development of commit 042ecf04
(Add API to calculate link-interface-dependent bool properties
or error., 2013-01-06), but was never used.

It was not necessary to use the content because what is really
useful in that logic is to determine if a property has been implied
to be null by appearing in a LINK_LIBRARIES genex.

I think the motivating usecase for developing the feature of
keeping track of the targets relevant to a property was that I
thought it would  make it possible to allow requiring granular
compatibility of interface properties only for targets which
depended on the interface property. Eg:

 add_library(foo ...)
 add_library(bar ...)

 add_executable(user ...)
 # Read the INTERFACE_POSITION_INDEPENDENT_CODE from bar, but not
 # from foo:
 target_link_libraries(user foo $<$<TARGET_PROPERTY:POSTITION_INDEPENDENT_CODE>:bar>)

This obviously doesn't make sense. We require that INTERFACE
properties are consistent across all linked targets instead.
2013-02-07 16:21:09 +01:00
Stephen Kelly 7c0ec75cfa De-duplicate validation of genex target names. 2013-02-07 16:21:08 +01:00
Stephen Kelly 92e98dd909 Deduplicate the isGeneratorExpression method.
This API seems like the most appropriate.
2013-02-07 16:21:08 +01:00
Stephen Kelly e48d84209c Cache context-independent includes on evaluation.
Generator expressions whose output depends on the configuration
now record that fact. The GetIncludeDirectories method can use
that result to cache the include directories for later calls.

GetIncludeDirectories is called multiple times for a target
for each configuration, so this should restore performance for
multi-config generators.
2013-02-03 23:04:03 +01:00
Stephen Kelly f99196dc0c Add cmGeneratorExpression::Split() API.
It can split a string like

 "A;$<1:B>;$<1:C>;D;E;$<1:F;G;H>;$<1:I>;J"

into

 "A" "$<1:B>" "$<1:C>" "D" "E" "$<1:F;G;H>" "$<1:I>" "J"
2013-01-10 18:06:03 +01:00
Stephen Kelly bf5ece51c3 Keep track of properties used to determine linker libraries.
Those properties can't later be implicitly defined by the interface
of those link libraries.
2013-01-08 20:38:16 +01:00
Stephen Kelly 26def1771d Make all relevant targets available in the genex context.
The current node being evaluated transitively in the generator
expression must be available to resolve mapped configs.
2013-01-05 01:18:36 +01:00
Stephen Kelly b2f1700bc7 GenEx: Add expressions to specify build- or install-only values
This is for specifying INCLUDE_DIRECTORIES relevant to the build-location
or the install location for example:

 set_property(TARGET foo PROPERTY
   INTERFACE_INCLUDE_DIRECTORIES
   "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR};${CMAKE_CURRENT_SOURCE_DIR}>"
   "$<INSTALL_INTERFACE:${CMAKE_INSTALL_PREFIX}/include>"
 )

A 'bar' target can then use:

 set_property(TARGET bar PROPERTY
   INCLUDE_DIRECTORIES
   "$<TARGET_PROPERTY:foo,INTERFACE_INCLUDE_DIRECTORIES>"
 )

and it will work whether foo is in the same project, or an imported target
from an installation location, or an imported target from a build location
generated by the export() command.

Because the generator expressions are only evaluated at build-time, these
new expressions are equivalent to the ZeroNode and OneNode.

The GeneratorExpression test is split into parts. Some shells can't run
the custom command as it is getting too long.
2013-01-05 01:05:08 +01:00
Stephen Kelly 0941d6232a Add a way to print the origins of used include directories. 2013-01-03 13:45:40 -05:00
Stephen Kelly 76ea420fb9 Use cmsys::auto_ptr to manage cmCompiledGeneratorExpressions
The compiled generator expressions need to outlive the creating
type. For the same reason, store the input string in a std::string.
2012-12-20 12:17:37 +01:00
Stephen Kelly d8a59ea4b3 Port cmGeneratorExpression to cmTarget from cmGeneratorTarget.
Following from the discussion here:

 http://thread.gmane.org/gmane.comp.programming.tools.cmake.devel/3615/focus=5170
 (Re: Generator expressisons in target properties, 26 Oct 12:10)

we can't split cmTarget API for linking into cmGeneratorTarget. In
the future we will probably also need to move the include and compile
definitions API back to cmTarget so that it can be used by export().
2012-11-21 00:11:54 +01:00
Stephen Kelly 79edd00235 GenEx: Fix reporting about not-found include directories and libraries.
This fixes a regression introduced in commit 290e92ad (Move
GetIncludeDirectories to cmGeneratorTarget, 2012-09-16) which loops over
cmGeneratorTargets before they get created, so the container is empty.
2012-10-17 16:23:32 -04:00
Stephen Kelly 7e807472d2 Add API to check that dependent target properties form a DAG.
Initially this will only be used to check for self-references, but
can be extended to check for cycles when chaining properties of other
targets.
2012-09-28 08:49:21 -04:00
Stephen Kelly 239ac84153 Add a generator expression for target properties.
There are two overloads, so that it can use the operational
target when a target property is being evaluated, and a target
can alternatively be specified by name.

At this point, the generators don't chain. That comes later.
2012-09-28 08:49:21 -04:00
Stephen Kelly c6abc41eb5 Add include guard for cmGeneratorExpression. 2012-09-21 13:28:54 +02:00
Stephen Kelly 91011bd217 cmGeneratorExpression: Port users to two-stage processing
Removing the Process() API and removing the parameters from the
constructor will allow cmGeneratorExpressions to be cached and evaluated
with multiple configs for example, such as when evaluating target
properties.  This requires the creation of a new compiled representation
of cmGeneratorExpression.  The cmListFileBacktrace remains in the
constructor so that we can record where a particular generator
expression appeared in the CMakeLists file.
2012-09-18 17:03:08 -04:00
Stephen Kelly f1eacf0e07 cmGeneratorExpression: Re-write for multi-stage evaluation
The expressions may be parsed and then cached and evaluated multiple
times.  They are evaluated lazily so that literals such as ',' can be
treated as universal parameter separators, and can be processed from
results without appearing literally, and without interfering with the
parsing/evaluation of the entire expression.
2012-09-18 17:02:23 -04:00
Brad King 9d9f616792 Add $<CONFIG:...> boolean query generator expression
This expression evaluates to '1' or '0' to indicate whether the build
configuration for which the expression is evaluated matches tha named
configuration.  In combination with the "$<0:...>" and "$<1:...>"
expressions this allows per-configuration content to be generated.
2012-08-15 11:44:49 -04:00
Brad King 4749e4cb76 Record set of targets used in cmGeneratorExpression 2010-12-15 14:53:46 -05:00
Brad King ef9e9de0b8 Optionally suppress errors in cmGeneratorExpression 2010-12-15 14:53:39 -05:00
Brad King 96afb12087 Convert CMake to OSI-approved BSD License
This converts the CMake license to a pure 3-clause OSI-approved BSD
License.  We drop the previous license clause requiring modified
versions to be plainly marked.  We also update the CMake copyright to
cover the full development time range.
2009-09-28 11:43:28 -04:00
Brad King d2e1f2b4d6 Introduce "generator expressions" to add_test()
This introduces a new syntax called "generator expressions" to the test
COMMAND option of the add_test(NAME) command mode.  These expressions
have a syntax like $<TARGET_FILE:mytarget> and are evaluated during
build system generation.  This syntax allows per-configuration target
output files to be referenced in test commands and arguments.
2009-08-11 09:54:56 -04:00