- `-fomit-frame-pointer` is included automatically by both GCC and
Clang in `-O1` and above.
- `-ftree-vectorize` is included automatically by GCC in `-O2` and
beyond, and seems always enabled by Clang.
Closes#66296. See that issue for a detailed investigation.
(cherry picked from commit c5c3d13dc0)
Adds support for LTO on macOS and Android.
Disable LTO by default on iOS even if `production=yes` is set.
Also add `linker` option to `server` platform missed in #63283.
Refactor code handling old arguments to make it simpler (breaks compat,
but is explicit enough about it and scripts are easy to fix).
This will allow adding developer checks which will be fully compiled out in
user builds, unlike `DEBUG_ENABLED` which is included in debug tempates and
the editor builds.
This define is not used yet, but we'll soon add code that uses it, and change
some existing `DEBUG_ENABLED` checks to be performed only in dev builds.
Related to https://github.com/godotengine/godot-proposals/issues/3371.
- Based on C++14's `shared_time_mutex`
- No more need to allocate-deallocate or check for null
- No pointer anymore, just a member variable
- Platform-specific implementations no longer needed
- Simpler for `NO_THREADS`
This is meant for users making custom builds to match the options used on
optimized, official builds.
This enables, on the platforms which support them:
- `use_static_cpp=yes` (portable binaries for Linux and Windows)
- `use_lto=yes` (link time optimizations - note: requires a lot of RAM!)
- `debug_symbols=no` (no debug symbols, smaller binaries)
Also abort when using MSVC with `production=yes`, as:
- It cannot optimize the GDScript VM like GCC or Clang do, leading to
significant performance drops.
- Its LTO support is unreliable, at least used to trigger crashes last
we tried it extensively.
All options can still be overridden if specified, and the `dev=yes` option
was changed to also support overrides.
(cherry picked from commit db26871210)
Otherwise we can get situations where platform-specific opts with the same name
can override each other depending on the order at which platforms are parsed,
as was the case with `use_static_cpp` in Linux/Windows.
Fixes#44304.
This also has the added benefit that the `scons --help` output will now only
include the options which are relevant for the selected (or detected) platform.
(cherry picked from commit 0f84d8dc49)
For some reason the `-target` option on the `LINKFLAGS` was causing a weird
issue where osxcross' clang wrapper would attempt using the system `/bin/ld`
instead of the osxcross version (which is Apple's `ld64`).
The error message would be:
```
/bin/ld: unrecognized option '-dynamic'
```
Also removed from `CCFLAGS` for consistency, it seems to work fine with only
`-mmacosx-version-min`.
(cherry picked from commit dbbbb53927)
`debug_symbols=yes` will now behave like `debug_symbols=full` did
before. The difference in compressed file sizes is not that large,
which means there isn't much point in having two different values.
This helps make the buildsystem easier to understand.
(cherry picked from commit ff1f0d2cb5)
Its last use was removed in Godot 3.0, so it no longer makes sense to define.
Also removed `D3D_DEBUG_INFO` for Windows as it's likely a left over from a
long time ago pre-opensourcing when Godot had some form of Direct3D 9 support?
(cherry picked from commit dcf902df85)
Configured for a max line length of 120 characters.
psf/black is very opinionated and purposely doesn't leave much room for
configuration. The output is mostly OK so that should be fine for us,
but some things worth noting:
- Manually wrapped strings will be reflowed, so by using a line length
of 120 for the sake of preserving readability for our long command
calls, it also means that some manually wrapped strings are back on
the same line and should be manually merged again.
- Code generators using string concatenation extensively look awful,
since black puts each operand on a single line. We need to refactor
these generators to use more pythonic string formatting, for which
many options are available (`%`, `format` or f-strings).
- CI checks and a pre-commit hook will be added to ensure that future
buildsystem changes are well-formatted.
(cherry picked from commit cd4e46ee65)
This reverts commit 2e152b945f.
SCons `FRAMEWORKS` is, according to their latest docs, only supported
"On Mac OS X with gcc". While the "with gcc" part seems bogus, #36795
did introduce a link failure for our osxcross toolchain for compiling
macOS binaries from Linux. SCons probably fails to detect this as a
macOS target and does not use its `FRAMEWORKS` logic properly.
So using `LINKFLAGS` as we used to is the more portable solution.
Fixes the link errors below
clang: error: no such file or directory: 'Carbon'
clang: error: no such file or directory: 'AudioUnit'
clang: error: no such file or directory: 'CoreAudio'
clang: error: no such file or directory: 'CoreMIDI'
clang: error: no such file or directory: 'IOKit'
clang: error: no such file or directory: 'ForceFeedback'
clang: error: no such file or directory: 'CoreVideo'
clang: error: no such file or directory: 'AVFoundation'
clang: error: no such file or directory: 'CoreMedia'
clang: error: no such file or directory: 'Metal'
clang: error: no such file or directory: 'QuartzCore'
Tested on
System Version: macOS 10.15.3 (19D76)
SCons by Steven Knight et al.:
script: v3.1.2.bee7caf9defd6e108fc2998a2520ddb36a967691, 2019-12-17 02:07:09, by bdeegan on octodog
engine: v3.1.2.bee7caf9defd6e108fc2998a2520ddb36a967691, 2019-12-17 02:07:09, by bdeegan on octodog
engine path: ['/usr/local/Cellar/scons/3.1.2_1/libexec/scons-local/SCons']
Xcode 11.3.1
Build version 11C504
Apple clang version 11.0.0 (clang-1100.0.33.17)
Target: x86_64-apple-darwin19.3.0
Closes#36720
(cherry picked from commit c924e83a64)
It's the recommended way to set those, and is more portable
(automatically prepends -D for GCC/Clang and /D for MSVC).
We still use CPPFLAGS for some pre-processor flags which are not
defines.
This is a new singleton where camera sources such as webcams or cameras on a mobile phone can register themselves with the Server.
Other parts of Godot can interact with this to obtain images from the camera as textures.
This work includes additions to the Visual Server to use this functionality to present the camera image in the background. This is specifically targetted at AR applications.
Include paths are processed from left to right, so we use Prepend to
ensure that paths to bundled thirdparty files will have precedence over
system paths (e.g. `/usr/include` should have lowest priority).
Many contributors (me included) did not fully understand what CCFLAGS,
CXXFLAGS and CPPFLAGS refer to exactly, and were thus not using them
in the way they are intended to be.
As per the SCons manual: https://www.scons.org/doc/HTML/scons-user/apa.html
- CCFLAGS: General options that are passed to the C and C++ compilers.
- CFLAGS: General options that are passed to the C compiler (C only;
not C++).
- CXXFLAGS: General options that are passed to the C++ compiler. By
default, this includes the value of $CCFLAGS, so that setting
$CCFLAGS affects both C and C++ compilation.
- CPPFLAGS: User-specified C preprocessor options. These will be
included in any command that uses the C preprocessor, including not
just compilation of C and C++ source files [...], but also [...]
Fortran [...] and [...] assembly language source file[s].
TL;DR: Compiler options go to CCFLAGS, unless they must be restricted
to either C (CFLAGS) or C++ (CXXFLAGS). Preprocessor defines go to
CPPFLAGS.
Godot supports many different compilers and for production releases we
have to support 3 currently: GCC8, Clang6, and MSVC2017. These compilers
all do slightly different things with -ffast-math and it is causing
issues now. See #24841, #24540, #10758, #10070. And probably other
complaints about physics differences between release and release_debug
builds.
I've done some performance comparisons on Linux x86_64. All tests are
ran 20 times.
Bunnymark: (higher is better)
(bunnies) min max stdev average
fast-math 7332 7597 71 7432
this pr 7379 7779 108 7621 (102%)
FPBench (gdscript port http://fpbench.org/) (lower is better)
(ms)
fast-math 15441 16127 192 15764
this pr 15671 16855 326 16001 (99%)
Float_add (adding floats in a tight loop) (lower is better)
(sec)
fast-math 5.49 5.78 0.07 5.65
this pr 5.65 5.90 0.06 5.76 (98%)
Float_div (dividing floats in a tight loop) (lower is better)
(sec)
fast-math 11.70 12.36 0.18 11.99
this pr 11.92 12.32 0.12 12.12 (99%)
Float_mul (multiplying floats in a tight loop) (lower is better)
(sec)
fast-math 11.72 12.17 0.12 11.93
this pr 12.01 12.62 0.17 12.26 (97%)
I have also looked at FPS numbers for tps-demo, 3d platformer, 2d
platformer, and sponza and could not find any measurable difference.
I believe that given the issues and oft-reported (physics) glitches on
release builds I believe that the couple of percent of tight-loop
floating point performance regression is well worth it.
This fixes#24540 and fixes#24841
Previously the compiler would use system headers located at
/System/Library/Frameworks, which could result in compilation failures
due to the headers not always being up-to-date in regards to the
latest installed macOS SDK headers that come with Xcode.
Fix the issue by passing the SDK path via the -isysroot option to the
compiler and linker invocations.
If no custom SDK path is given, the build system queries the SDK path
via xcrun --show-sdk-path, which returns something similar to
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/
/Developer/SDKs/MacOSX.sdk/
Querying via xcrun is now also done for iphone (and simulator)
platforms as well.
Here is an example of a compilation failure message due to outdated
headers:
platform/osx/os_osx.mm:1421:41: error: use of undeclared identifier 'NSAppKitVersionNumber10_12'; did you mean 'NSAppKitVersionNumber'?
if (floor(NSAppKitVersionNumber) >= NSAppKitVersionNumber10_12) {
^~~~~~~~~~~~~~~~~~~~~~~~~~
NSAppKitVersionNumber
/System/Library/Frameworks/AppKit.framework/Headers/NSApplication.h:26:28: note: 'NSAppKitVersionNumber' declared here
