Commit Graph

22 Commits

Author SHA1 Message Date
Stephen Kelly ef25ba8d06 Constify handling of target dependencies. 2013-12-11 15:30:11 +01:00
Stephen Kelly 97fae68b81 Remove INTERFACE build targets.
Commit b04f3b9a (Create make rules for INTERFACE_LIBRARY
targets., 2013-08-21) extended the makefile generator to create
build targets for INTERFACE_LIBRARY targets. No other generators
were extended with this feature.

This conflicts with the feature of whitelisting of target properties
read from INTERFACE_LIBRARY targets. The INTERFACE_* properties
of the INTERFACE_LIBRARY may legitimately contain TARGET_PROPERTY
generator expressions for reading properties from the 'head target'.
The 'head target' would be the INTERFACE_LIBRARY itself when creating
the build rules for it, which means that non-whitelisted properties
would be read.
2013-12-10 17:58:36 +01:00
Stephen Kelly 0bfcb450e6 INTERFACE_LIBRARY: Avoid codepaths which set unneeded properties.
As an INTERFACE_LIBRARY has no direct link dependencies, we can
short-circuit in cmGeneratorExpressionEvaluator and
in cmGlobalGenerator::CheckLocalGenerators.

As they do not generate any output directly, any generate- or install-
related code acn also be short-circuited. Many of the local generators
already do this.

Because only INTERFACE related properties make sense on INTERFACE_LIBRARY
targets, avoid setting other properties, for example via defaults.
2013-11-25 16:17:50 +01:00
Stephen Kelly b04f3b9a2a Create make rules for INTERFACE_LIBRARY targets.
The result is that the depends of the target are created.

So,

 add_library(somelib foo.cpp)
 add_library(anotherlib EXCLUDE_FROM_ALL foo.cpp)
 add_library(extra EXCLUDE_FROM_ALL foo.cpp)
 target_link_libraries(anotherlib extra)

 add_library(iface INTERFACE)
 target_link_libraries(iface INTERFACE anotherlib)

Executing 'make iface' will result in the anotherlib and extra targets
being made.

Adding a regular executable to the INTERFACE of an INTERFACE_LIBRARY
will not result in the executable being built with 'make iface' because
of the logic in cmComputeTargetDepends::AddTargetDepend.

So far, this is implemented only for the Makefile generator. Other
generators will follow if this feature is possible for them.

Make INTERFACE_LIBRARY targets part of the all target by default.
Test this by building the all target and making the expected library
EXCLUDE_FROM_ALL.
2013-10-21 09:46:27 -04:00
Stephen Kelly 340535156d Add entire link interface transitive closure as target depends.
This was missing from commit 30962029 (Make targets depend on the
link interface of their dependees., 2012-12-26), which caused
only immeditate entries of the link interface to become target
depends.
2013-07-02 17:01:37 +02:00
Stephen Kelly 7653862798 Add LINK_LIBRARIES property for direct target link dependencies
Previously we kept direct link dependencies in OriginalLinkLibraries.
The property exposes the information in the CMake language through the
get/set_property commands.  We preserve the OriginalLinkLibraries value
internally to support old APIs like that for CMP0003's OLD behavior, but
the property is now authoritative.  This follows up from commit d5cf644a
(Split link information processing into two steps, 2012-11-01).

This will be used later to populate the link interface properties when
exporting targets, and will later allow use of generator expressions
when linking to libraries with target_link_libraries.

Also make targets depend on the (config-specific) union of dependencies.
CMake now allows linking to dependencies or not depending on the config.
However, generated build systems are not all capable of processing
config-specific dependencies, so the targets depend on the union of
dependencies for all configs.
2013-01-08 09:02:43 -05:00
Stephen Kelly 40cf3fb95b Make linking APIs aware of 'head' target
The 'head' is the dependent target to be linked with the current target.
It will be used to evaluate generator expressions with proper handling
of mapped configurations and is used as the source target of properties.

This requires that memoization is done with a key of a pair of target
and config, instead of just config, because now the result also depends
on the target.  Removing the memoization entirely is not an option
because it slows cmake down considerably.
2013-01-08 08:53:25 -05:00
Stephen Kelly 3096202932 Make targets depend on the link interface of their dependees. 2013-01-03 13:31:50 -05:00
Yury G. Kudryashov 43d60114a5 Run vim spellcheck on some files 2012-02-29 14:07:50 -05:00
Nicolas Despres 3db2973bd2 Refactor TargetTypeNames.
Make it a static method instead of an array. It is safer for the
type checking and if we add a new target type we will be warned to add
a case to the switch.
2011-10-02 18:30:42 +01:00
Brad King 8ee9bbbd0c Do not crash when an imported target depends on a missing target
Commit e01cce28 (Allow add_dependencies() on imported targets,
2010-11-19) forgot to check if the dependee exists before using it.
2011-08-04 15:36:32 -04:00
Brad King e01cce2869 Allow add_dependencies() on imported targets (#10395)
Imported targets do not themselves build, but we can follow dependencies
through them to find real targets.  This allows imported targets to
depend on custom targets that provide the underlying files at build
time.
2010-11-19 17:19:21 -05:00
Brad King 605f4bc097 Record edge type in global dependency graph
Each inter-target dependency may be a 'link' or 'util' dependency.
2010-11-18 10:51:00 -05:00
Brad King adb58d5e36 Honor strong intra-component target dependencies
Strong dependencies (created by add_dependencies) must be honored when
linearizing a strongly-connected component of the target dependency
graph.  The initial graph edges have strong/weak labels and can contain
cycles that do not consist exclusively of strong edges.  The final graph
never contains cycles so all edges can be strong.
2010-08-25 17:14:13 -04:00
Brad King 681cf011dd Distinguish "strong" and "weak" target dependency edges
Utility dependencies are "strong" because they must be enforced to
generate a working build.  Link dependencies are "weak" because they can
be broken in the case of a static library cycle.
2010-08-25 17:10:00 -04:00
Brad King 7be2617b5a Split notion of node lists and edge lists 2010-08-25 17:10:00 -04:00
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 fd62a7cac4 Create GLOBAL_DEPENDS_NO_CYCLES property
This global property disallows cycles in the inter-target dependency
graph even among STATIC libraries.  See issue #9444.
2009-08-24 09:54:27 -04:00
Brad King d76b20bf3a BUG: Avoid bogus dependency on executable targets
When an executable target within the project is named in
target_link_libraries for another target, but the executable does not
have the ENABLE_EXPORTS property set, then the executable cannot really
be linked.  This is probably a case where the user intends to link to a
third-party library that happens to have the same name as an executable
target in the project (or else will get an error at build time).  We
need to avoid making the other target depend on the executable target
incorrectly, since the executable may actually want to link to that
target and this is not a circular depenency.
2008-08-06 17:48:53 -04:00
Brad King 37a009b7f7 ENH: Improve readability of circular depends error
When reporting the dependencies in a strongly connected component quote
the target names to make the message more readable no matter the target
name.
2008-08-06 17:48:49 -04:00
Brad King 4987e17f46 ENH: Improve link line generation for static library cycles.
- Move Tarjan algorithm from cmComputeTargetDepends
    into its own class cmComputeComponentGraph
  - Use cmComputeComponentGraph to identify the component DAG
    of link dependencies in cmComputeLinkDepends
  - Emit non-trivial component members more than once but always
    in a contiguous group on the link line
2008-02-07 16:14:05 -05:00
Brad King 523ddedac5 ENH: Analyze inter-target dependencies to safely fix cycles
- Cycles may be formed among static libraries
  - Native build system should not have cycles in target deps
  - Create cmComputeTargetDepends to analyze dependencies
  - Identify conneced components and use them to fix deps
  - Diagnose cycles containing non-STATIC targets
  - Add debug mode property GLOBAL_DEPENDS_DEBUG_MODE
  - Use results in cmGlobalGenerator as target direct depends
2008-02-05 23:10:41 -05:00