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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Use of `ffi_type_complex_double` is unguarded","articleBody":"# Bug report\n\n### Bug description:\n\ne.g.\n\n```\n   -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\n./Modules/_ctypes/cfield.c:1610:36: error: 'ffi_type_complex_double' is only available on macOS 10.15 or newer [-Werror,-Wunguarded-availability-new]\n        case 'C': fd-\u003epffi_type = \u0026ffi_type_complex_double; break;\n                                   ^~~~~~~~~~~~~~~~~~~~~~~\n/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\nFFI_AVAILABLE_APPLE_2019 FFI_EXTERN ffi_type ffi_type_complex_double;\n                                             ^\n./Modules/_ctypes/cfield.c:1610:36: note: enclose 'ffi_type_complex_double' in a __builtin_available check to silence this warning\n        case 'C': fd-\u003epffi_type = \u0026ffi_type_complex_double; break;\n                                   ^~~~~~~~~~~~~~~~~~~~~~~\n./Modules/_ctypes/cfield.c:1611:36: error: 'ffi_type_complex_float' is only available on macOS 10.15 or newer [-Werror,-Wunguarded-availability-new]\n        case 'E': fd-\u003epffi_type = \u0026ffi_type_complex_float; break;\n                                   ^~~~~~~~~~~~~~~~~~~~~~\n/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\nFFI_AVAILABLE_APPLE_2019 FFI_EXTERN ffi_type ffi_type_complex_float;\n                                             ^\n./Modules/_ctypes/cfield.c:1611:36: note: enclose 'ffi_type_complex_float' in a __builtin_available check to silence this warning\n        case 'E': fd-\u003epffi_type = \u0026ffi_type_complex_float; break;\n                                   ^~~~~~~~~~~~~~~~~~~~~~\n./Modules/_ctypes/cfield.c:1612:36: error: 'ffi_type_complex_double' is only available on macOS 10.15 or newer [-Werror,-Wung\nuarded-availability-new]\n        case 'F': fd-\u003epffi_type = \u0026ffi_type_complex_longdouble; break;\n                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~\n/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/ffi/ffi.h:240:37: note: expanded from macro 'ffi_type_complex_longdouble'\n#define ffi_type_complex_longdouble ffi_type_complex_double\n                                    ^~~~~~~~~~~~~~~~~~~~~~~\n/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\nFFI_AVAILABLE_APPLE_2019 FFI_EXTERN ffi_type ffi_type_complex_double;\n                                             ^\n./Modules/_ctypes/cfield.c:1612:36: note: enclose 'ffi_type_complex_double' in a __builtin_available check to silence this warning\n        case 'F': fd-\u003epffi_type = \u0026ffi_type_complex_longdouble; break;\n                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~\n/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/ffi/ffi.h:240:37: note: expanded from macro 'ffi_type_complex_longdouble'\n#define ffi_type_complex_longdouble ffi_type_complex_double\n                                    ^~~~~~~~~~~~~~~~~~~~~~~\n```\n\nSee https://github.com/python/cpython/issues/100384 for context and similar issues.\n\n### CPython versions tested on:\n\nCPython main branch\n\n### Operating systems tested on:\n\nmacOS\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-128680\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/zanieb","@type":"Person","name":"zanieb"},"datePublished":"2024-12-21T15:58:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":22},"url":"https://github.com/128156/cpython/issues/128156"}