This changes a bunch of things:
1. Each framework now creates its own include directory for exported headers, and any target linking with this framework, gets that directory added to its include search path. This ensures deterministic behavior, unlike previously where a single shared directory was used, so even if target A did not explicitly link with target B, there was a reasonable chance that target B’s headers would be available when target A was built.
2. There is a new IMPORT keyword to indicate that a target depends on the headers of another framework but does not want to link with it. For example the `commit` shell command imports headers from the CommitWindow framework (related to their communications protocol) but linking with the CommitWindow framework would not be practical (as that would bring in all the resources of the CommitWindow).
3. All embedded targets are signed before being copied to their destination.
4. A new CS_ENTITLEMENTS keyword allows specifying `codesign` entitlements. Currently the hardened runtime is enabled, although this does make development problematic, as modifying files of a running instance (as done during rebuild) can cause TextMate to crash with EXC_BAD_ACCESS (Code Signature Invalid). Worse though, it seems the system has a cache of blacklisted executables indexed by inode. So if e.g. the embedded `mate` executable gets blacklisted, one has to manually remove and rebuild it, before it gets possible to use it again (by default, rebuilding causes the inode to be re-used, but I may change the build system to unlink before copy).
5. The build file no longer contains rules related to deployment. Instead variables are declared that a user build file can reference to extend the build with notarization/deployment rules (without having to hardcode build directory paths).
6. The code has been made modular with a Compiler super class that is subclassed to add support for file transformations (xib, ragel, asset catalogs, etc.) and a transformed file can have its own settings.
7. If target A links with target B, the linker flags of target B will now be included when linking target A.
8. Currently no indexing of help books. Unsure if this is actually useful.
9. Previously it was possible to have umbrella targets that would not generate any output, but just change settings for their sub-targets. This is no longer supported, as the implementation was arcane. I would like to introduce a different system for managing sectioned settings. Related to this; settings in target files are now always merged, regardless of whether using ‘=’ or ‘+=’.
Compiling code that uses the `bug` macro
while the `NDEBUG` symbol is defined
(which it is by default)
results in “expression result unused” warnings
for each argument to the `bug` call.
This change adds the parameter declaration
from the debug version to the non-debug version,
which silences these warnings.
This allowed framework headers to test whether they were build as part of the framework itself, or part of building something that depends on the framework.
Ideally though we should not need two different paths for those two cases, and we no longer have.
The standard doesn’t care which side the keyword is placed on, but placing it on the right makes it easier to read types.
E.g. reading “int const* const” from right to left we get “const pointer to const integer”.
We now explicitly disable it for targets that hasn’t yet been upgraded to ARC. This way, it’s easier to get an overview of which targets hasn’t yet been upgraded and ensures new targets has ARC enabled.
