CMake 3.16 and below allow multiple `export()` calls with the same output
file even without using `APPEND`. The implementation worked by accident
by leaking memory. Refactoring in commit 5444a8095d (cmGlobalGenerator:
modernize memrory managemenbt, 2019-12-29, v3.17.0-rc1~239^2) cleaned up
that memory leak and converted it to a use-after-free instead.
The problem is caused by using the `cmGlobalGenerator::BuildExportSets`
map to own `cmExportBuildFileGenerator` instances. It can own only
one instance per output FILE name at a time, so repeating use of the
same file now frees the old `cmExportBuildFileGenerator` instance
and leaves the pointer in the `cmMakefile::ExportBuildFileGenerators`
vector dangling. Move ownership of the instances into `cmMakefile`'s
vector since its entries are not replaced on a repeat output FILE.
In future work we should introduce a policy to error out on this case.
For now simply fix the use-after-free to restore CMake <= 3.16 behavior.
Fixes: #20469
Enable debug messages a new `--find-debug` command-line option or via
the `CMAKE_FIND_DEBUG_MODE` variable.
This work was started by Chris Wilson, continued by Ray Donnelly, and
then refactored by Robert Maynard to collect information into a single
message per find query.
Co-Author: Ray Donnelly <mingw.android@gmail.com>
Co-Author: Chris Wilson <chris+github@qwirx.com>
Move custom command creation to cmLocalGenerator and dispatch custom
commands in cmMakefile to generate time. Generators add custom commands
using the new methods provided by cmLocalGenerator.
Issue: #12877
dd0f304613 Objective C/C++: Add compiler standard detection
b515af782b Help: Add release note for Objective-C/C++ language support
9e66397c28 Languages: Add support for Objective-C++
80f120a85f Languages: Add support for Objective-C
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !3811
0e1faa28cb cmMakefile: Separate custom command setup from actual creation
56c204e8eb cmMakefile: Refactor AddCustomCommandOldStyle to be delay friendly
3061dc6ac9 add_custom_command: Add tests for rejecting literal quotes in commands
e893ab94ba cmMakefile: Validate command line for all custom commands
f1e846fdde cmMakefile: Extract custom command validation method
4926ab2454 cmMakefile: Create all generated byproducts as known sources
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !3822
Provide a standardized way to handle the C++ "standard" headers
customized to be used with current CMake C++ standard constraints.
Offer under directory `cm` headers which can be used as direct
replacements of the standard ones. For example:
#include <cm/string_view>
can be used safely for CMake development in place of the `<string_view>`
standard header.
Fixes: #19491
Given an output source name it is now possible to query which target has a
byproduct of this name or has a PRE_BUILD, PRE_LINK, or POST_BUILD build event
with a byproduct of this name.
In a call to GetSourceFileWithOutput a matching byproduct can now optionally be
returned as fallback if there is no matching output of a custom command.
Default behavior is not changed by this commit.
Setting the GENERATED property of outputs upfront is a precondition for delayed
custom command creation (generator expressions in outputs).
Issue: 12877
f71f7ce3f0 cmStringAlgorithms: Move string functions to the new cmStringAlgorithms.h
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !3618
This changes `cmMakefile::AddDefinition` to take a `cm::string_view` as value
argument instead of a `const char *`.
Benefits are:
- `std::string` can be passed to `cmMakefile::AddDefinition` directly without
the `c_str()` plus string length recomputation fallback.
- Lengths of literals passed to `cmMakefile::AddDefinition` can be computed at
compile time.
In various sources uses of `cmMakefile::AddDefinition` are adapted to avoid
`std::string::c_str` calls and the `std::string` is passed directly.
Uses of `cmMakefile::AddDefinition`, where a `nullptr` `const char*` might
be passed to `cmMakefile::AddDefinition` are extended with `nullptr` checks.
This simplifies the `cmMakefile::AddDefinition` method with bool value
overload to call the string based `cmMakefile::AddDefinition` method
with either an "ON" or "OFF" string.
Also the method is renamed to `cmMakefile::AddDefinitionBool`
732dd344b9 cmCommand: remove FinalPass from interface
fbee46e262 cmVariableWatchCommand: Port away from FinalPass
360d415592 cmLoadCommandCommand: Port away from FinalPass
316e40baec cmInstallProgramsCommand: Port away from FinalPass
7bc88b9165 cmInstallFilesCommand: Port away from FinalPass
6a1a3763ee cmFLTKWrapUICommand: Port away from FinalPass
20169f0b8d cmExportLibraryDependenciesCommand: Port away from FinalPass
a74dad3bd3 cmMakefile: decouple FinalAction from cmCommand
...
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !3562
