building on arm64

[totaam]

Following https://github.com/Xpra-org/xpra/blob/master/docs/Build/MacOS.md

Running the gtk-osx-setup.sh setup script, Python 3.10.10 complained that:

WARNING: The Python lzma extension was not compiled. Missing the lzma lib?

Perhaps this will cause problems later?

Then:

$ jhbuild 
Killed: 9
$ which jhbuild 
/Users/totaam/.new_local/bin//jhbuild
$ bash -x  /Users/totaam/.new_local/bin//jhbuild bootstrap-gtk-osx
...

Eh!

bootstrapping:

*** Configuring xz *** [1/15]
(..)
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... configure: error: in `/Users/totaam/.cache/jhbuild/build/xz-5.2.5':
configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details

Because we need to set arm64 in .jhbuildrc-custom.

zlib complained about not finding ninja, pip3.10 install ninja fixed that - but perhaps not the location we should be using..

Then this more obscure one on libxml2:

17 warnings generated.
  CCLD     libxml2mod.la
Undefined symbols for architecture arm64:
  "_PyBool_Type", referenced from:
      _libxml_xmlXPathObjectPtrConvert in types.o
  "_PyBytes_AsString", referenced from:
      _xmlPythonFileReadRaw in libxml.o
      _xmlPythonFileRead in libxml.o
      _PystringSet_Convert in libxml.o
  "_PyBytes_Size", referenced from:
      _xmlPythonFileReadRaw in libxml.o
      _xmlPythonFileRead in libxml.o
(..)
  "__Py_TrueStruct", referenced from:
      _libxml_xmlXPathObjectPtrConvert in types.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

[totaam]

Fixes this one by adding -lpython3.10 to LDFLAGS, inspiration came from https://bugs.gentoo.org/758473

• 19

• libxslt: skip tests, then the same fix as libxml2.
• gtk-doc: $JHBUILD_PREFIX/bin/python3 -m ensurepip && $JHBUILD_PREFIX/bin/python3 -m pip install pygments.
• glib:

  [589/1179] Compiling Objective-C object gio/libgio-2.0.0.dylib.p/gosxcontenttype.m.o
  FAILED: gio/libgio-2.0.0.dylib.p/gosxcontenttype.m.o 
  /Library/Developer/CommandLineTools/usr/bin/gcc -Igio/libgio-2.0.0.dylib.p -Igio -I../../../../gtk/source/glib-2.72.0/gio -I. -I../../../../gtk/source/glib-2.72.0 -Iglib -I../../../../gtk/source/glib-2.72.0/glib -Igobject -I../../../../gtk/source/glib-2.72.0/gobject -Igmodule -I../../../../gtk/source/glib-2.72.0/gmodule -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -I/Users/totaam/gtk/inst/include -fcolor-diagnostics -Wall -Winvalid-pch -Wextra -Wpedantic -std=gnu99 -O2 -g -Wimplicit-fallthrough -Wmisleading-indentation -Wunused -Wno-unused-parameter -Wno-cast-function-type -Wno-pedantic -Wno-format-zero-length -Wno-variadic-macros -Werror=format=2 -Werror=init-self -Werror=missing-include-dirs -Werror=pointer-arith -Wstrict-prototypes -Wno-bad-function-cast -Werror=declaration-after-statement -Werror=implicit-function-declaration -Werror=missing-prototypes -arch arm64 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -mmacosx-version-min=12 -arch arm64 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk '-DG_LOG_DOMAIN="GLib-GIO"' -DGIO_COMPILATION '-DGIO_MODULE_DIR="/Users/totaam/gtk/inst/lib/gio/modules"' '-DLOCALSTATEDIR="/Users/totaam/gtk/inst/var"' -fvisibility=hidden -MD -MQ gio/libgio-2.0.0.dylib.p/gosxcontenttype.m.o -MF gio/libgio-2.0.0.dylib.p/gosxcontenttype.m.o.d -o gio/libgio-2.0.0.dylib.p/gosxcontenttype.m.o -c ../../../../gtk/source/glib-2.72.0/gio/gosxcontenttype.m
  ../../../../gtk/source/glib-2.72.0/gio/gosxcontenttype.m:63:11: error: mixing declarations and code is incompatible with standards before C99 [-Werror,-Wdeclaration-after-statement]
  CFIndex length = CFStringGetLength (str);
        ^

  "Solved" by removing -Wdeclaration-after-statement from build.ninja.

• gtk:

  FAILED: demos/gtk-demo/gtkdemo_resources.h 

  "Solved" by not building the demos.

[totaam]

• librsvg: needs cargo - probably installed wrong using the default location..
• pyobjc: add -Wno-error=unreachable-code
• python3-pyobjc-framework-cocoa: CFLAGS="-Wno-error=uninitialized" python3 setup.py build ..
• opus: should use meson?
• vpx: error: "--enable-runtime-cpu-detect selected, but no CPU detection method " "available for your platform

[totaam]

The bash issue is a "security" feature, just use /bin/bash instead.

[totaam]

cc0cab3e59cae373ab8ca04d495cd67eb3d86a1b pulls updates from upstream and saves the need for a lot of the workarounds. But we still have some new / unfixed ones:

• pixman needed --disable-arm-a64-neon to avoid syntax errors in macro expansion
• opus still does not build - needs switching to meson
• vpx no CPU detection method:

  ~/gtk/source/libvpx-1.13.0/vpx_ports/arm_cpudetect.c:151:2: error: \
  "--enable-runtime-cpu-detect selected, but no CPU detection method " "available for your platform. \
  Reconfigure with --disable-runtime-cpu-detect."

[totaam]

After merging all the changes from upstream in cc0cab3e59cae373ab8ca04d495cd67eb3d86a1b, arm64 builds seem to work OK.

[totaam]

For testing the arm64 builds on the build system, this may be useful: How to enable OS X screen sharing (VNC) through SSH?

[totaam]

We no longer have to override arch=arm64: 99d2ed1ef210cdd3a6ea23cb5775fffc89b82abe

And the minimum MacOS version is now 12: 7dd24486ea880fa942033430723c8c954e379c92