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Use of ffi_type_complex_double is unguarded #128156

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@zanieb

Description

@zanieb

Bug report

Bug description:

e.g.

   -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden -Werror=unguarded-availability-new  -I./Include/internal -I./Include/internal/mimalloc  -I. -I./Include     -c ./Modules/_ctypes/cfield.c -o Modules/_ctypes/cfield.o
./Modules/_ctypes/cfield.c:1610:36: error: 'ffi_type_complex_double' is only available on macOS 10.15 or newer [-Werror,-Wunguarded-availability-new]
        case 'C': fd->pffi_type = &ffi_type_complex_double; break;
                                   ^~~~~~~~~~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/ffi/ffi.h:236:46: note: 'ffi_type_complex_double' has been marked as being introduced in macOS 10.15 here, but the deployment target is macOS 10.9.0
FFI_AVAILABLE_APPLE_2019 FFI_EXTERN ffi_type ffi_type_complex_double;
                                             ^
./Modules/_ctypes/cfield.c:1610:36: note: enclose 'ffi_type_complex_double' in a __builtin_available check to silence this warning
        case 'C': fd->pffi_type = &ffi_type_complex_double; break;
                                   ^~~~~~~~~~~~~~~~~~~~~~~
./Modules/_ctypes/cfield.c:1611:36: error: 'ffi_type_complex_float' is only available on macOS 10.15 or newer [-Werror,-Wunguarded-availability-new]
        case 'E': fd->pffi_type = &ffi_type_complex_float; break;
                                   ^~~~~~~~~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/ffi/ffi.h:235:46: note: 'ffi_type_complex_float' has been marked as being introduced in macOS 10.15 here, but the deployment target is macOS 10.9.0
FFI_AVAILABLE_APPLE_2019 FFI_EXTERN ffi_type ffi_type_complex_float;
                                             ^
./Modules/_ctypes/cfield.c:1611:36: note: enclose 'ffi_type_complex_float' in a __builtin_available check to silence this warning
        case 'E': fd->pffi_type = &ffi_type_complex_float; break;
                                   ^~~~~~~~~~~~~~~~~~~~~~
./Modules/_ctypes/cfield.c:1612:36: error: 'ffi_type_complex_double' is only available on macOS 10.15 or newer [-Werror,-Wung
uarded-availability-new]
        case 'F': fd->pffi_type = &ffi_type_complex_longdouble; break;
                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/ffi/ffi.h:240:37: note: expanded from macro 'ffi_type_complex_longdouble'
#define ffi_type_complex_longdouble ffi_type_complex_double
                                    ^~~~~~~~~~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/ffi/ffi.h:236:46: note: 'ffi_type_complex_double' has been marked as being introduced in macOS 10.15 here, but the deployment target is macOS 10.9.0
FFI_AVAILABLE_APPLE_2019 FFI_EXTERN ffi_type ffi_type_complex_double;
                                             ^
./Modules/_ctypes/cfield.c:1612:36: note: enclose 'ffi_type_complex_double' in a __builtin_available check to silence this warning
        case 'F': fd->pffi_type = &ffi_type_complex_longdouble; break;
                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/ffi/ffi.h:240:37: note: expanded from macro 'ffi_type_complex_longdouble'
#define ffi_type_complex_longdouble ffi_type_complex_double
                                    ^~~~~~~~~~~~~~~~~~~~~~~

See #100384 for context and similar issues.

CPython versions tested on:

CPython main branch

Operating systems tested on:

macOS

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OS-macbuildThe build process and cross-buildextension-modulesC modules in the Modules dirtype-bugAn unexpected behavior, bug, or error

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