kivy fails to build on MacOS 15.4.1 (-armv7 compiler failure)

[b-bargabus]

Versions

• Python : 3.13.2
• MacOS version : 15.4.1
• XCode Version : 16.3 (xcode-select --version 2409)
• Cython version : 3.0.12

Describe the bug
kivy-ios fails to build on MacOS 15.4.1. This appears to be a similar type of cases mentioned in prior incident reports #936, #937, and #945 (possible #963 too but there haven't been any feedback on that yet). It looks like @tcaduser may have patched the issue from #936 and #937 and was accepted by @AndreMiras but the same or similar issue may have resurfaced. This error appears to occur when attempting to build for armv7 which I believe has been fully deprecated at this point, perhaps it's necessary to drop armv7 (or silo it off) now to prevent these issues resurfacing.

To Reproduce
Trying to build with:

toolchain build python3 kivy

causes the failure. See below for full logs. I've tried using pipx directly from GitHub rather than pipx with the app name. I've tried cloning the repo and building from scratch. Neither approach addressed the issue. I tried (as @tcaduser suggested in another ticket) forcing removal of libb2 from brew, that did not fix the issue either. I've cleaned my environment multiple times without success. At this point it appears to be a bug in kivy-ios.

Expected behavior
toolchain is able to build kivy successfully.

Logs
toolchain build logs (snipped to comply with post length limit on GitHub, see attachment for complete logs build_log.txt)

<snip - see attached file for complete output>
[DEBUG   ] checking for egrep... (cached) /usr/bin/grep -E
[DEBUG   ] checking for memcpy... yes
[DEBUG   ] checking for size_t... yes
[DEBUG   ] checking for working alloca.h... yes
[DEBUG   ] checking for alloca... yes
[DEBUG   ] checking size of double... 8
[DEBUG   ] checking size of long double... 8
[DEBUG   ] checking whether byte ordering is bigendian... no
[DEBUG   ] checking assembler .cfi pseudo-op support... yes
[DEBUG   ] checking whether compiler supports pointer authentication... no
[DEBUG   ] checking for _ prefix in compiled symbols... yes
[DEBUG   ] checking whether C compiler accepts -fno-lto... yes
[DEBUG   ] checking whether .eh_frame section should be read-only... yes
[DEBUG   ] checking for __attribute__((visibility("hidden")))... yes
[DEBUG   ] clang: error: unsupported option '-print-multi-os-directory'
[DEBUG   ] clang: error: no input files
[DEBUG   ] configure: versioning on shared library symbols is no
[DEBUG   ] checking that generated files are newer than configure... done
[DEBUG   ] configure: creating ./config.status
[DEBUG   ] config.status: creating include/Makefile
[DEBUG   ] config.status: creating include/ffi.h
[DEBUG   ] config.status: creating Makefile
[DEBUG   ] config.status: creating testsuite/Makefile
[DEBUG   ] config.status: creating man/Makefile
[DEBUG   ] config.status: creating doc/Makefile
[DEBUG   ] config.status: creating libffi.pc
[DEBUG   ] config.status: creating fficonfig.h
[DEBUG   ] config.status: executing buildir commands
[DEBUG   ] config.status: skipping top_srcdir/Makefile - not created
[DEBUG   ] config.status: executing depfiles commands
[DEBUG   ] config.status: executing libtool commands
[DEBUG   ] config.status: executing include commands
[DEBUG   ] config.status: executing src commands
[DEBUG   ] checking build system type... i386-apple-darwin24.4.0
[DEBUG   ] checking host system type... arm-apple-darwin11
[DEBUG   ] checking target system type... arm-apple-darwin11
[DEBUG   ] checking for gsed... sed
[DEBUG   ] checking for a BSD-compatible install... /usr/bin/install -c
[DEBUG   ] checking whether build environment is sane... yes
[DEBUG   ] checking for arm-apple-darwin11-strip... no
[DEBUG   ] checking for strip... strip
[DEBUG   ] checking for a race-free mkdir -p... ../install-sh -c -d
[DEBUG   ] checking for gawk... no
[DEBUG   ] checking for mawk... no
[DEBUG   ] checking for nawk... no
[DEBUG   ] checking for awk... awk
[DEBUG   ] checking whether make sets $(MAKE)... yes
[DEBUG   ] checking whether make supports nested variables... yes
[DEBUG   ] checking for arm-apple-darwin11-gcc... xcrun -sdk iphoneos clang -target armv7-apple-ios
[DEBUG   ] checking whether the C compiler works... no
[DEBUG   ] configure: error: in `/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.4/build_iphoneos-armv7':
[DEBUG   ] configure: error: C compiler cannot create executables
[DEBUG   ] See `config.log' for more details
[DEBUG   ] Traceback (most recent call last):
[DEBUG   ]   File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.4/generate-darwin-source-and-headers.py", line 314, in <module>
[DEBUG   ]     generate_source_and_headers(
[DEBUG   ]     ~~~~~~~~~~~~~~~~~~~~~~~~~~~^
[DEBUG   ]         generate_osx=not args.only_ios and not args.only_tvos and not args.only_watchos,
[DEBUG   ]         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[DEBUG   ]     ...<2 lines>...
[DEBUG   ]         generate_watchos=not args.only_ios and not args.only_osx and not args.only_tvos,
[DEBUG   ]         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[DEBUG   ]     )
[DEBUG   ]     ^
[DEBUG   ]   File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.4/generate-darwin-source-and-headers.py", line 283, in generate_source_and_headers
[DEBUG   ]     build_target(ios_device_armv7_platform, platform_headers)
[DEBUG   ]     ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[DEBUG   ]   File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.4/generate-darwin-source-and-headers.py", line 232, in build_target
[DEBUG   ]     subprocess.check_call(['../configure', '-host', platform.triple], env=env)
[DEBUG   ]     ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[DEBUG   ]   File "/usr/local/Cellar/python@3.13/3.13.2/Frameworks/Python.framework/Versions/3.13/lib/python3.13/subprocess.py", line 421, in check_call
[DEBUG   ]     raise CalledProcessError(retcode, cmd)
[DEBUG   ] subprocess.CalledProcessError: Command '['../configure', '-host', 'arm-apple-darwin11']' returned non-zero exit status 77.
Exception in thread background thread for pid 14565:
Traceback (most recent call last):
  File "/usr/local/Cellar/python@3.13/3.13.2/Frameworks/Python.framework/Versions/3.13/lib/python3.13/threading.py", line 1041, in _bootstrap_inner
    self.run()
    ~~~~~~~~^^
  File "/usr/local/Cellar/python@3.13/3.13.2/Frameworks/Python.framework/Versions/3.13/lib/python3.13/threading.py", line 992, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/_____/.local/pipx/venvs/kivy-ios/lib/python3.13/site-packages/sh.py", line 1642, in wrap
    fn(*rgs, **kwargs)
    ~~^^^^^^^^^^^^^^^^
  File "/Users/_____/.local/pipx/venvs/kivy-ios/lib/python3.13/site-packages/sh.py", line 2647, in background_thread
    handle_exit_code(exit_code)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/Users/_____/.local/pipx/venvs/kivy-ios/lib/python3.13/site-packages/sh.py", line 2338, in fn
    return self.command.handle_command_exit_code(exit_code)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/Users/_____/.local/pipx/venvs/kivy-ios/lib/python3.13/site-packages/sh.py", line 823, in handle_command_exit_code
    raise exc
sh.ErrorReturnCode_1: 

  RAN: /usr/local/bin/python3 generate-darwin-source-and-headers.py --only-ios

  STDOUT:
Skipping i386
checking build system type... x86_64-apple-darwin24.4.0
checking host system type... x86_64-apple-darwin13
checking target system type... x86_64-apple-darwin13
checking for gsed... sed
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for x86_64-apple-darwin13-strip... no
checking for strip... strip
checking for a race-free mkdir -p... ../install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for x86_64-apple-darwin13-gcc... xcrun -sdk iphonesimulator clang -target x86_64-apple-ios-simulator
check... (22074 more, please see e.stdout)

  STDERR:

Traceback (most recent call last):
  File "/Users/_____/.local/bin/toolchain", line 8, in <module>
    sys.exit(main())
             ~~~~^^
  File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/kivy_ios/toolchain.py", line 1703, in main
    ToolchainCL()
    ~~~~~~~~~~~^^
  File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/kivy_ios/toolchain.py", line 1440, in __init__
    getattr(self, args.command)()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/kivy_ios/toolchain.py", line 1516, in build
    build_recipes(args.recipe, ctx)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/kivy_ios/toolchain.py", line 1252, in build_recipes
    recipe.execute()
    ~~~~~~~~~~~~~~^^
  File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/kivy_ios/toolchain.py", line 777, in execute
    self.build_all()
    ~~~~~~~~~~~~~~^^
  File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/kivy_ios/toolchain.py", line 77, in _cache_execution
    f(self, *args, **kwargs)
    ~^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/kivy_ios/toolchain.py", line 877, in build_all
    self.build(plat)
    ~~~~~~~~~~^^^^^^
  File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/kivy_ios/toolchain.py", line 77, in _cache_execution
    f(self, *args, **kwargs)
    ~^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/kivy_ios/toolchain.py", line 863, in build
    self.build_platform(plat)
    ~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/kivy_ios/recipes/libffi/__init__.py", line 33, in build_platform
    shprint(python3, "generate-darwin-source-and-headers.py", "--only-ios")
    ~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/kivy_ios/toolchain.py", line 59, in shprint
    for line in cmd:
                ^^^
  File "/Users/_____/.local/pipx/venvs/kivy-ios/lib/python3.13/site-packages/sh.py", line 879, in __next__
    self.wait()
    ~~~~~~~~~^^
  File "/Users/_____/.local/pipx/venvs/kivy-ios/lib/python3.13/site-packages/sh.py", line 796, in wait
    self.handle_command_exit_code(exit_code)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/Users/_____/.local/pipx/venvs/kivy-ios/lib/python3.13/site-packages/sh.py", line 823, in handle_command_exit_code
    raise exc
sh.ErrorReturnCode_1: 

  RAN: /usr/local/bin/python3 generate-darwin-source-and-headers.py --only-ios

  STDOUT:
Skipping i386
checking build system type... x86_64-apple-darwin24.4.0
checking host system type... x86_64-apple-darwin13
checking target system type... x86_64-apple-darwin13
checking for gsed... sed
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for x86_64-apple-darwin13-strip... no
checking for strip... strip
checking for a race-free mkdir -p... ../install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for x86_64-apple-darwin13-gcc... xcrun -sdk iphonesimulator clang -target x86_64-apple-ios-simulator
check... (22074 more, please see e.stdout)

  STDERR:

config.log

This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by libffi configure 3.4.4, which was
generated by GNU Autoconf 2.71.  Invocation command line was

  $ ../configure -host arm-apple-darwin11

## --------- ##
## Platform. ##
## --------- ##

hostname = _____.local
uname -m = x86_64
uname -r = 24.4.0
uname -s = Darwin
uname -v = Darwin Kernel Version 24.4.0: Fri Apr 11 18:28:23 PDT 2025; root:xnu-11417.101.15~117/RELEASE_X86_64

/usr/bin/uname -p = i386
/bin/uname -X     = unknown

/bin/arch              = unknown
/usr/bin/arch -k       = unknown
/usr/convex/getsysinfo = unknown
/usr/bin/hostinfo      = Mach kernel version:
	 Darwin Kernel Version 24.4.0: Fri Apr 11 18:28:23 PDT 2025; root:xnu-11417.101.15~117/RELEASE_X86_64
Kernel configured for up to 32 processors.
16 processors are physically available.
32 processors are logically available.
Processor type: x86_64h (Intel x86-64h Haswell)
Processors active: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Primary memory available: 192.00 gigabytes
Default processor set: 522 tasks, 3720 threads, 32 processors
Load average: 2.86, Mach factor: 29.13
/bin/machine           = unknown
/usr/bin/oslevel       = unknown
/bin/universe          = unknown

PATH: /usr/gnu/bin/
PATH: /usr/local/bin/
PATH: /bin/
PATH: /usr/bin/
PATH: ./


## ----------- ##
## Core tests. ##
## ----------- ##

configure:3073: looking for aux files: ltmain.sh compile missing install-sh config.guess config.sub
configure:3086:  trying ../
configure:3115:   ../ltmain.sh found
configure:3115:   ../compile found
configure:3115:   ../missing found
configure:3097:   ../install-sh found
configure:3115:   ../config.guess found
configure:3115:   ../config.sub found
configure:3236: checking build system type
configure:3251: result: i386-apple-darwin24.4.0
configure:3271: checking host system type
configure:3285: result: arm-apple-darwin11
configure:3305: checking target system type
configure:3319: result: arm-apple-darwin11
configure:3417: checking for gsed
configure:3453: result: sed
configure:3482: checking for a BSD-compatible install
configure:3555: result: /usr/bin/install -c
configure:3566: checking whether build environment is sane
configure:3621: result: yes
configure:3673: checking for arm-apple-darwin11-strip
configure:3708: result: no
configure:3718: checking for strip
configure:3739: found /usr/bin/strip
configure:3750: result: strip
configure:3776: checking for a race-free mkdir -p
configure:3820: result: ../install-sh -c -d
configure:3827: checking for gawk
configure:3862: result: no
configure:3827: checking for mawk
configure:3862: result: no
configure:3827: checking for nawk
configure:3862: result: no
configure:3827: checking for awk
configure:3848: found /usr/bin/awk
configure:3859: result: awk
configure:3870: checking whether make sets $(MAKE)
configure:3893: result: yes
configure:3923: checking whether make supports nested variables
configure:3941: result: yes
configure:4105: checking for arm-apple-darwin11-gcc
configure:4137: result: xcrun -sdk iphoneos clang -target armv7-apple-ios
configure:4535: checking for C compiler version
configure:4544: xcrun -sdk iphoneos clang -target armv7-apple-ios --version >&5
Apple clang version 17.0.0 (clang-1700.0.13.3)
Target: armv7-apple-ios
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
configure:4555: $? = 0
configure:4544: xcrun -sdk iphoneos clang -target armv7-apple-ios -v >&5
Apple clang version 17.0.0 (clang-1700.0.13.3)
Target: armv7-apple-ios
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
configure:4555: $? = 0
configure:4544: xcrun -sdk iphoneos clang -target armv7-apple-ios -V >&5
clang: error: argument to '-V' is missing (expected 1 value)
clang: error: no input files
configure:4555: $? = 1
configure:4544: xcrun -sdk iphoneos clang -target armv7-apple-ios -qversion >&5
clang: error: unknown argument '-qversion'; did you mean '--version'?
clang: error: no input files
configure:4555: $? = 1
configure:4544: xcrun -sdk iphoneos clang -target armv7-apple-ios -version >&5
clang: error: unknown argument '-version'; did you mean '--version'?
clang: error: no input files
configure:4555: $? = 1
configure:4575: checking whether the C compiler works
configure:4597: xcrun -sdk iphoneos clang -target armv7-apple-ios -miphoneos-version-min=9.0   conftest.c  >&5
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk/usr/lib/libSystem.tbd, missing required architecture armv7 in file /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk/usr/lib/libSystem.tbd (2 slices)
ld: dynamic executables or dylibs must link with libSystem.dylib for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
configure:4601: $? = 1
configure:4641: result: no
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "libffi"
| #define PACKAGE_TARNAME "libffi"
| #define PACKAGE_VERSION "3.4.4"
| #define PACKAGE_STRING "libffi 3.4.4"
| #define PACKAGE_BUGREPORT "http://github.com/libffi/libffi/issues"
| #define PACKAGE_URL ""
| #define PACKAGE "libffi"
| #define VERSION "3.4.4"
| /* end confdefs.h.  */
| 
| int
| main (void)
| {
| 
|   ;
|   return 0;
| }
configure:4646: error: in `/Users/_____/Documents/GitHub/kivy-ios/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.4/build_iphoneos-armv7':
configure:4648: error: C compiler cannot create executables
See `config.log' for more details

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## Cache variables. ##
## ---------------- ##

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am_cv_make_support_nested_variables=yes

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## Output variables. ##
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build_cpu='i386'
build_os='darwin24.4.0'
build_vendor='apple'
datadir='${datarootdir}'
datarootdir='${prefix}/share'
docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
dvidir='${docdir}'
exec_prefix='NONE'
host='arm-apple-darwin11'
host_alias='arm-apple-darwin11'
host_cpu='arm'
host_os='darwin11'
host_vendor='apple'
htmldir='${docdir}'
includedir='${prefix}/include'
infodir='${datarootdir}/info'
install_sh='${SHELL} /Users/_____/Documents/GitHub/kivy-ios/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.4/install-sh'
libdir='${exec_prefix}/lib'
libexecdir='${exec_prefix}/libexec'
localedir='${datarootdir}/locale'
localstatedir='${prefix}/var'
mandir='${datarootdir}/man'
mkdir_p='$(MKDIR_P)'
oldincludedir='/usr/include'
pdfdir='${docdir}'
prefix='NONE'
program_transform_name='s,x,x,'
psdir='${docdir}'
runstatedir='${localstatedir}/run'
sbindir='${exec_prefix}/sbin'
sharedstatedir='${prefix}/com'
sys_symbol_underscore=''
sysconfdir='${prefix}/etc'
target='arm-apple-darwin11'
target_alias='arm-apple-darwin11'
target_cpu='arm'
target_os='darwin11'
target_vendor='apple'
tmake_file=''
toolexecdir=''
toolexeclibdir=''

## ----------- ##
## confdefs.h. ##
## ----------- ##

/* confdefs.h */
#define PACKAGE_NAME "libffi"
#define PACKAGE_TARNAME "libffi"
#define PACKAGE_VERSION "3.4.4"
#define PACKAGE_STRING "libffi 3.4.4"
#define PACKAGE_BUGREPORT "http://github.com/libffi/libffi/issues"
#define PACKAGE_URL ""
#define PACKAGE "libffi"
#define VERSION "3.4.4"

configure: exit 77

Screenshots
N/A

Additional context
Any reason why this continues to build for armv7?

[rectogon]

i have exactly the same error. I did what you did ,sadly nothing work. Hope you figure it out if you got it, please share it here

[b-bargabus]

i have exactly the same error. I did what you did ,sadly nothing work. Hope you figure it out if you got it, please share it here

Happy to report back once I have a solution. I suspect it's because Xcode no longer supports armv7, it's been deprecated for years, I'm not sure why it's included in kivy-ios at all since you can't distribute 32 bit apps anymore regardless (app store has been 64bit only for years). I suppose in theory we could try to downgrade to whatever the last version of Xcode was that had support for armv7 but I'm not even sure how far back that would be and I can't downgrade my environment and not be able to work with any other modern projects I have. I'm just on the outside looking in here but my suspicion is that it's time for armv7 to be removed and it will take assistance from the development team to do that.

[misl6]

Hi @rectogon @b-bargabus ,

This should have been fixed via #966, can you perform a test on latest master version of kivy-ios ?

[b-bargabus]

Hi @rectogon @b-bargabus ,

This should have been fixed via #966, can you perform a test on latest master version of kivy-ios ?

Great news! Anything special you want me to do or just clone latest and build?

[misl6]

Great news! Anything special you want me to do or just clone latest and build?

Hi @b-bargabus ;

Just ensure your build and dist folder are clean (python toolchain.py distclean or toolchain distclean), clone the latest kivy-ios from master branch and build again.

[b-bargabus]

Just ensure your build and dist folder are clean (python toolchain.py distclean or toolchain distclean), clone the latest kivy-ios from master branch and build again.

I removed the old attempt and cloned the latest from master. Ran the clean commands from toolchain just to be sure (although this was a new folder anyway). It got further but ran into another issue a bit further down the line. It looks like it was trying to find a header file fp.h (floating point?) and failed to do so while building some png related files (there's a reference to libpng in the logs and a few specific files: pngerror.c, pngget.c, pngrtran.c, pngmem.c, pngread.c, pngwio.c, pngset.c, pngtrans.c, pngpriv.h, pngrutil.c, png.c, pngwrite.c, maybe more that I'm missing but the relevant log outputs are below). I'm not sure where it's expecting to find fp.h (part of iOS SDK?) but it doesn't appear to be finding it.

[begin partial logs]

[DEBUG   ] /bin/sh ./libtool  --tag=CC   --mode=link /var/folders/9c/s7r1q0gs11jf43_127n6xqx40000gn/T/tmpu6la9n_d  -O3 -miphoneos-version-min=9.0 -I/Users/user/Documents/GitHub/kivy-ios/dist/include/iphoneos-arm64/ffi -I/Users/user/Documents/GitHub/kivy-ios/dist/include/common/libpng -I/Users/user/Documents/GitHub/kivy-ios/dist/include/iphoneos-arm64/openssl -I/Users/user/Documents/GitHub/kivy-ios/dist/include/common/sdl2 -I/Users/user/Documents/GitHub/kivy-ios/dist/include/common/sdl2_image -I/Users/user/Documents/GitHub/kivy-ios/dist/include/common/sdl2_mixer -I/Users/user/Documents/GitHub/kivy-ios/dist/include/common/sdl2_ttf -I/Users/user/Documents/GitHub/kivy-ios/dist/include/iphoneos-arm64 -I/Users/user/Documents/GitHub/kivy-ios/dist/root/python3/include/python3.11  -arch arm64 -L/Users/user/Documents/GitHub/kivy-ios/dist/lib/iphoneos -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk/usr/lib -miphoneos-version-min=9.0 -o png-fix-itxt contrib/tools/png-fix-itxt.o  -lz 
[DEBUG   ] In file included from pngerror.c:19:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from pngget.c:15:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from pngrtran.c:19:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from pngmem.c:20:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from pngpread.c:14:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] 1 error generated.
[DEBUG   ] 1 error generated.
[DEBUG   ] 1 error generated.
[DEBUG   ] 1 error generated.
[DEBUG   ] In file included from pngwio.c:21:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] make[1]: *** [pngerror.lo] Error 1
[DEBUG   ] make[1]: *** Waiting for unfinished jobs....
[DEBUG   ] In file included from In file included from pngset.c:pngtrans.c19::
[DEBUG   ] 14:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      incl  ud524e |  #< f p . h > 
[DEBUG   ]       i| n               ^~~~~~c
[DEBUG   ] lude <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] make[1]: *** [pngget.lo] Error 1
[DEBUG   ] make[1]: *** [pngmem.lo] Error 1
[DEBUG   ] In file included from pngrutil.c:17:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] make[1]: *** [pngpread.lo] Error 1
[DEBUG   ] 1 error generated.
[DEBUG   ] In file included from png.c:14:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from pngwrite.c:14:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #   In file included from    ipngread.cn:c17l:
[DEBUG   ] ude./pngpriv.h :<524f:p16.:h >fatal error: 
[DEBUG   ] 'fp.h' file not found      
[DEBUG   ] |                ^~~~~~
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from arm/arm_init.c:16:
[DEBUG   ] arm/../pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   In file included from 524 | powerpc/powerpc_init.c#: 19 :
[DEBUG   ]    powerpc/../pngpriv.h :i524n:c16l:u dfatal error: e'fp.h' file not found 
[DEBUG   ] <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from mips/mips_init.c:19:
[DEBUG   ] mips/../pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from pngwtran.c:14:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from pngrio.c:21:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from arm/palette_neon_intrinsics.c:13:
[DEBUG   ] arm/../pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from pngwutil.c:14:
[DEBUG   ] ./pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] In file included from arm/filter_neon_intrinsics.c:14:
[DEBUG   ] arm/../pngpriv.h:524:16: fatal error: 'fp.h' file not found
[DEBUG   ]   524 | #      include <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] 1 error generated.
[DEBUG   ] 1 error generated.
[DEBUG   ] In file included from mips/filter_msa_intrinsics.c:15:
[DEBUG   ] mips/../pngpriv.h:524:16: fatal error: 'fp.h' file not foundIn file included from 
[DEBUG   ] powerpc/filter_vsx_intrinsics.c:14:
[DEBUG   ] powerpc/../pngpriv.h:524:16: fatal error: 'fp.h' file not found  
[DEBUG   ] 524 | #      inc  524l | u#d e   < f p .ihn>c
[DEBUG   ] l      u| d               ^~~~~~e
[DEBUG   ]  <fp.h>
[DEBUG   ]       |                ^~~~~~
[DEBUG   ] 1 error generated.
[DEBUG   ] 11 error error generated generated.
[DEBUG   ] .
[DEBUG   ] 1 error generated.
[DEBUG   ] 1 error generated.
[DEBUG   ] make[1]: *** [pngwio.lo] Error 1
[DEBUG   ] 1 error generated.
[DEBUG   ] 1 error generated.
[DEBUG   ] 1 error generated.
[DEBUG   ] make[1]: *** [pngtrans.lo] Error 1
[DEBUG   ] 1 error generated.
[DEBUG   ] 1 error generated.
[DEBUG   ] 1 error generated.
[DEBUG   ] make[1]: *** [pngset.lo] Error 1
[DEBUG   ] make[1]: *** [mips/mips_init.lo] Error 1
[DEBUG   ] make[1]: *** [powerpc/powerpc_init.lo] Error 1
[DEBUG   ] make[1]: *** [arm/arm_init.lo] Error 1
[DEBUG   ] make[1]: *** [pngrio.lo] Error 1
[DEBUG   ] make[1]: *** [pngwtran.lo] Error 1
[DEBUG   ] make[1]: *** [pngwrite.lo] Error 1
[DEBUG   ] make[1]: *** [png.lo] Error 1
[DEBUG   ] make[1]: *** [pngread.lo] Error 1
[DEBUG   ] make[1]: *** [powerpc/filter_vsx_intrinsics.lo] Error 1
[DEBUG   ] make[1]: *** [pngwutil.lo] Error 1
[DEBUG   ] make[1]: *** [mips/filter_msa_intrinsics.lo] Error 1
[DEBUG   ] 1 error generated.
[DEBUG   ] make[1]: *** [pngrutil.lo] Error 1
[DEBUG   ] libtool: link: /var/folders/9c/s7r1q0gs11jf43_127n6xqx40000gn/T/tmpu6la9n_d -O3 -miphoneos-version-min=9.0 -I/Users/user/Documents/GitHub/kivy-ios/dist/include/iphoneos-arm64/ffi -I/Users/user/Documents/GitHub/kivy-ios/dist/include/common/libpng -I/Users/user/Documents/GitHub/kivy-ios/dist/include/iphoneos-arm64/openssl -I/Users/user/Documents/GitHub/kivy-ios/dist/include/common/sdl2 -I/Users/user/Documents/GitHub/kivy-ios/dist/include/common/sdl2_image -I/Users/user/Documents/GitHub/kivy-ios/dist/include/common/sdl2_mixer -I/Users/user/Documents/GitHub/kivy-ios/dist/include/common/sdl2_ttf -I/Users/user/Documents/GitHub/kivy-ios/dist/include/iphoneos-arm64 -I/Users/user/Documents/GitHub/kivy-ios/dist/root/python3/include/python3.11 -arch arm64 -miphoneos-version-min=9.0 -o png-fix-itxt contrib/tools/png-fix-itxt.o  -L/Users/user/Documents/GitHub/kivy-ios/dist/lib/iphoneos -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk/usr/lib -lz
[DEBUG   ] 1 error generated.
[DEBUG   ] 1 error generated.
[DEBUG   ] 1 error generated.
[DEBUG   ] make[1]: *** [pngrtran.lo] Error 1
[DEBUG   ] make[1]: *** [arm/palette_neon_intrinsics.lo] Error 1
[DEBUG   ] make[1]: *** [arm/filter_neon_intrinsics.lo] Error 1
[DEBUG   ] make: *** [all] Error 2
Exception in thread background thread for pid 4746:
Traceback (most recent call last):
  File "/usr/local/Cellar/python@3.13/3.13.2/Frameworks/Python.framework/Versions/3.13/lib/python3.13/threading.py", line 1041, in _bootstrap_inner
    self.run()
    ~~~~~~~~^^
  File "/usr/local/Cellar/python@3.13/3.13.2/Frameworks/Python.framework/Versions/3.13/lib/python3.13/threading.py", line 992, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/user/Documents/GitHub/kivy-ios/venv/lib/python3.13/site-packages/sh.py", line 1642, in wrap
    fn(*rgs, **kwargs)
    ~~^^^^^^^^^^^^^^^^
  File "/Users/user/Documents/GitHub/kivy-ios/venv/lib/python3.13/site-packages/sh.py", line 2647, in background_thread
    handle_exit_code(exit_code)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/Users/user/Documents/GitHub/kivy-ios/venv/lib/python3.13/site-packages/sh.py", line 2338, in fn
    return self.command.handle_command_exit_code(exit_code)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/Users/user/Documents/GitHub/kivy-ios/venv/lib/python3.13/site-packages/sh.py", line 823, in handle_command_exit_code
    raise exc
sh.ErrorReturnCode_2: 

  RAN: /usr/bin/make -j32

  STDOUT:
rm -f pnglibconf.c pnglibconf.tf[45]
awk -f ./scripts/options.awk out=pnglibconf.tf4 version=search\
	    ./pngconf.h ./scripts/pnglibconf.dfa\
	    ./pngusr.dfa  1>&2
awk -f ./scripts/options.awk out=pnglibconf.tf5 pnglibconf.tf4 1>&2
rm pnglibconf.tf4
mv pnglibconf.tf5 pnglibconf.c
rm -f pnglibconf.out pnglibconf.tf[12]
test -d scripts || mkdir scripts || test -d scripts
/var/folders/9c/s7r1q0gs11jf43_127n6xqx40000gn/T/tmpu6la9n_d -E -DHAVE_CONFIG_H -I. \
	     -DPNGLIB_LIBNAME='PNG16_0' -DPNGLIB_VERSION='1.6.40' -DSYMBOL_PREFIX='' -DPNG_NO_USE_READ_MACROS -DPNG_BUILDING_SYMBOL_TABLE  pnglibconf.c > pnglibconf.tf1
awk -f "./scripts/dfn.awk" out="pnglibconf.tf2" pnglibconf.tf1 1>&2
rm -f pnglibconf.tf1
mv pnglibconf.tf2 pnglibconf.out
rm -... (58717 more, please see e.stdout)

  STDERR:

Traceback (most recent call last):
  File "/Users/user/Documents/GitHub/kivy-ios/venv/bin/toolchain", line 8, in <module>
    sys.exit(main())
             ~~~~^^
  File "/Users/user/Documents/GitHub/kivy-ios/kivy_ios/toolchain.py", line 1703, in main
    ToolchainCL()
    ~~~~~~~~~~~^^
  File "/Users/user/Documents/GitHub/kivy-ios/kivy_ios/toolchain.py", line 1440, in __init__
    getattr(self, args.command)()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/Users/user/Documents/GitHub/kivy-ios/kivy_ios/toolchain.py", line 1516, in build
    build_recipes(args.recipe, ctx)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/Users/user/Documents/GitHub/kivy-ios/kivy_ios/toolchain.py", line 1252, in build_recipes
    recipe.execute()
    ~~~~~~~~~~~~~~^^
  File "/Users/user/Documents/GitHub/kivy-ios/kivy_ios/toolchain.py", line 777, in execute
    self.build_all()
    ~~~~~~~~~~~~~~^^
  File "/Users/user/Documents/GitHub/kivy-ios/kivy_ios/toolchain.py", line 77, in _cache_execution
    f(self, *args, **kwargs)
    ~^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/user/Documents/GitHub/kivy-ios/kivy_ios/toolchain.py", line 877, in build_all
    self.build(plat)
    ~~~~~~~~~~^^^^^^
  File "/Users/user/Documents/GitHub/kivy-ios/kivy_ios/toolchain.py", line 77, in _cache_execution
    f(self, *args, **kwargs)
    ~^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/user/Documents/GitHub/kivy-ios/kivy_ios/toolchain.py", line 863, in build
    self.build_platform(plat)
    ~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/Users/user/Documents/GitHub/kivy-ios/kivy_ios/recipes/libpng/__init__.py", line 26, in build_platform
    shprint(sh.make, self.ctx.concurrent_make, _env=build_env)
    ~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/user/Documents/GitHub/kivy-ios/kivy_ios/toolchain.py", line 59, in shprint
    for line in cmd:
                ^^^
  File "/Users/user/Documents/GitHub/kivy-ios/venv/lib/python3.13/site-packages/sh.py", line 879, in __next__
    self.wait()
    ~~~~~~~~~^^
  File "/Users/user/Documents/GitHub/kivy-ios/venv/lib/python3.13/site-packages/sh.py", line 796, in wait
    self.handle_command_exit_code(exit_code)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/Users/user/Documents/GitHub/kivy-ios/venv/lib/python3.13/site-packages/sh.py", line 823, in handle_command_exit_code
    raise exc
sh.ErrorReturnCode_2: 

  RAN: /usr/bin/make -j32

  STDOUT:
rm -f pnglibconf.c pnglibconf.tf[45]
awk -f ./scripts/options.awk out=pnglibconf.tf4 version=search\
	    ./pngconf.h ./scripts/pnglibconf.dfa\
	    ./pngusr.dfa  1>&2
awk -f ./scripts/options.awk out=pnglibconf.tf5 pnglibconf.tf4 1>&2
rm pnglibconf.tf4
mv pnglibconf.tf5 pnglibconf.c
rm -f pnglibconf.out pnglibconf.tf[12]
test -d scripts || mkdir scripts || test -d scripts
/var/folders/9c/s7r1q0gs11jf43_127n6xqx40000gn/T/tmpu6la9n_d -E -DHAVE_CONFIG_H -I. \
	     -DPNGLIB_LIBNAME='PNG16_0' -DPNGLIB_VERSION='1.6.40' -DSYMBOL_PREFIX='' -DPNG_NO_USE_READ_MACROS -DPNG_BUILDING_SYMBOL_TABLE  pnglibconf.c > pnglibconf.tf1
awk -f "./scripts/dfn.awk" out="pnglibconf.tf2" pnglibconf.tf1 1>&2
rm -f pnglibconf.tf1
mv pnglibconf.tf2 pnglibconf.out
rm -... (58717 more, please see e.stdout)

  STDERR:

[misl6]

Yep, the png issue is on my backlog.

A fix might be ready tomorrow.

Can you confirm libffi has been built successfully after the latest changes?

[b-bargabus]

Yep, the png issue is on my backlog.

A fix might be ready tomorrow.

Awesome! I really appreciate all the quick responses on this.

Can you confirm libffi has been built successfully after the latest changes?

Appears so from the logs (see below). If you want me to check for a specific file in a specific path just let me know what and where and I'll validate its existence too. Note that there is a warning about targeting a minimum iOS version of 8.0 when current Xcode only supports iOS 12+. It's just a warning and doesn't fail the build but could be something that become a bug later if that situation changes.

[snippet from logs]

[DEBUG   ] /Users/_____/Documents/GitHub/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.8/libffi.xcodeproj: warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 12.0 to 18.4.99. (in target 'libffi-iOS' from project 'libffi')
[DEBUG   ] warning: Run script build phase 'Run Script' will be run during every build because it does not specify any outputs. To address this issue, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'libffi-iOS' from project 'libffi')
[DEBUG   ] ** BUILD SUCCEEDED **
[DEBUG   ] 
[DEBUG   ] 
[INFO    ] Postbuild libffi for arm64
[DEBUG   ] Invoking postbuild_arm64
Found junk /Users/_____/Documents/GitHub/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.8/ltmain.sh, removing
Found junk /Users/_____/Documents/GitHub/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.8/msvcc.sh, removing
Found junk /Users/_____/Documents/GitHub/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.8/testsuite/emscripten/node-tests.sh, removing
Found junk /Users/_____/Documents/GitHub/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.8/testsuite/emscripten/build.sh, removing
Found junk /Users/_____/Documents/GitHub/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.8/testsuite/emscripten/build-tests.sh, removing
Found junk /Users/_____/Documents/GitHub/kivy-ios/build/libffi/iphoneos-arm64/libffi-3.4.8/build/libffi.build/Release-iphoneos/libffi-iOS.build/Script-43B5D3FB1D35480D00D1E1FD.sh, removing
[DEBUG   ] New State: libffi.build.iphoneos-arm64 at 2025-05-07 19:29:32.029377

[b-bargabus]

Yep, the png issue is on my backlog.

A fix might be ready tomorrow.

Can you confirm libffi has been built successfully after the latest changes?

@misl6 just wanted to check in and see if you want me to try out new code. Thanks!

[misl6]

@misl6 just wanted to check in and see if you want me to try out new code. Thanks!

Hi,

I've just merged a fix for the png issue into the master branch.

However, another small fix might be required to build another kivy dependency. (Already have a fix on my laptop, but can't push until monday)

Feel free to perform a new test and send results!

[b-bargabus]

@misl6 just wanted to check in and see if you want me to try out new code. Thanks!

Hi,

I've just merged a fix for the png issue into the master branch.

However, another small fix might be required to build another kivy dependency. (Already have a fix on my laptop, but can't push until monday)

Feel free to perform a new test and send results!

Great! I'll probably have time tomorrow to rebuild and validate the PNG fix anyway. I'll check out the rest on Monday. Appreciate all the help.

[b-bargabus]

@misl6 just wanted to check in and see if you want me to try out new code. Thanks!

Hi,

I've just merged a fix for the png issue into the master branch.

However, another small fix might be required to build another kivy dependency. (Already have a fix on my laptop, but can't push until monday)

Feel free to perform a new test and send results!

I attempted to build but something went sideways with openssl. When it goes after the tarball is fails five times then gives up.

[INFO    ] Downloading http://www.openssl.org/source/openssl-1.1.1w.tar.gz
[WARNING ] Download failed. Retrying in 1 second...
[WARNING ] Download failed. Retrying in 1 second...
[WARNING ] Download failed. Retrying in 1 second...
[WARNING ] Download failed. Retrying in 1 second...
[ERROR   ] Max download attempts reached: 5

I can plug the URL into a browser and download it so the URL functions. When I curl that address I get an HTTP 301 so maybe it's not resolving the redirect from openssl.org to github.com correctly? That's just speculation though. I'll try it again later this morning in case it's something weird with connectivity and resolves itself.

edit: disregard this particular item, it was an expired certificate. Python doesn't use system certs so I had to update python's certs explicitly using Install Certificates.command.

libpng built successfully. I'm running into another issue when linking the ios library. That's probably what you were referring to in your prior message but I'll post another follow up with logs in case it's helpful.