This shaves around 5 seconds off the stdlib build if you're using a
release/no-assert LLVM (so around 12.5% of total time if you're also
using a release/no-assert swift, or around 4% of total time if you're
using a debug/assert swift).
The underlying LLVM issue is tracked by rdar://problem/19430955.
I saw no significant reproducible performance loss due to this change.
Resolves rdar://problem/19431821.
Swift SVN r24342
Often times one wants to pass certain flags to swift when building
specific libraries and not others. This has in the past required
manually modifying the cmake system. This new option allows one to use
string regexps based on the module_name of a library to enable and
disable various flags. The way this works is you pass the following into
build-script:
--extra-swift-options="${REGEX1};${FLAGS1_WITH_SEMICOLONS_ESCAPED}"
--extra-swift-options="${REGEX2};${FLAGS2_WITH_SEMICOLONS_ESCAPED}"
--extra-swift-options="${REGEX3};${FLAGS3_WITH_SEMICOLONS_ESCAPED}"
--extra-swift-options="${REGEX4};${FLAGS4_WITH_SEMICOLONS_ESCAPED}"
--extra-swift-options="${REGEX5};${FLAGS5_WITH_SEMICOLONS_ESCAPED}"
Every library that matches REGEPN will have FLAGSN_... appended to their
swift flags. For instance if I did the following:
build-script --extra-swift-options="Swift;-Xfrontend\;-sil-print-pass-name" --extra-swift-options='^Swift$;-Xllvm\;-debug-only=sil-arc-opts" ...
CMake will output the following:
-- Matched 'Swift' to module 'Swift'. Compiling Swift with special flags: -Xfrontend;-sil-print-pass-name
-- Matched '^Swift$' to module 'Swift'. Compiling Swift with special flags: -Xllvm;-debug-only=sil-arc-opts
-- Matched 'Swift' to module 'SwiftExperimental'. Compiling SwiftExperimental with special flags: -Xfrontend;-sil-print-pass-name
-- Matched 'Swift' to module 'SwiftStructures'. Compiling SwiftStructures with special flags: -Xfrontend;-sil-print-pass-name
-- Matched 'Swift' to module 'SwiftStructuresGraphBFS'. Compiling SwiftStructuresGraphBFS with special flags: -Xfrontend;-sil-print-pass-name
stating which regexp was matched, the module it was matched to and the
added flags. This ensures that one only gets matches for what one wants.
Swift SVN r24271
This flag disables the generation of dependency targets that are necessary to accurately rebuild Swift code, but which completely tank the Xcode IDE experience. Since Xcode is primarily useful as a source editor/navigator for the compiler C++ code, and Ninja is a more performant and featureful build system for Swift at this point, provide a mode that generates enough of an Xcode project to edit the Swift compiler source, but which can't build it, as a compromise so we can use Xcode's editor alongside a Ninja build environment.
Swift SVN r24186
This worked in standalone build by creating a directory that never got used but it failed in a non-standalone build.
Fix tracked with Dmitri's help.
Swift SVN r24180
This works around an apparent Xcode bug that prevented the generated
project from properly building static libraries when all of the inputs
were Swift sources. Building static libraries works fine now in Xcode.
Swift SVN r19956
...by pretending to be OS X 10.9. This might remove the need for other
workarounds as well, but I'm not going to go track those down right now.
Swift SVN r13886
The Swift stdlib build uses CMAKE_FORCE_C_COMPILER to cross-compile.
When the compiler is forced cmake does not set the compiler version
variables that llvm's build started checking in llvm commit bf2609e26.
Swift SVN r12311
