Add numpy specific extensions for iOS builds.

Author: freakboy3742

docs/markdown/Dependencies.md

@@ -462,10 +462,11 @@ TODO
 
 Supports the BLAS and LAPACK components of macOS Accelerate, also referred to
 as the vecLib framework. ILP64 support is only available on macOS 13.3 and up.
-From macOS 13.3, Accelerate ships with two different builds of 32-bit (LP64)
-BLAS and LAPACK. Meson will default to the newer of those builds, by defining
-`ACCELERATE_NEW_LAPACK`, unless `MACOS_DEPLOYMENT_TARGET` is set to a version
-lower than 13.3.
+From macOS 13.3 and iOS 16.4, Accelerate ships with two different builds of
+32-bit (LP64) BLAS and LAPACK. Meson will default to the newer of those builds,
+by defining `ACCELERATE_NEW_LAPACK`, unless `MACOS_DEPLOYMENT_TARGET` is set to
+a version lower than 13.3, or `IPHONEOS_DEPLOYMENT_TARGET` is set to a version
+lower than 16.4.
 
 ```meson
 accelerate_dep = dependency('accelerate',

mesonbuild/dependencies/blas_lapack.py

@@ -738,7 +738,10 @@ def __init__(self, name: str, environment: 'Environment', kwargs: T.Dict[str, T.
         self.parse_modules(kwargs)
 
         for_machine = MachineChoice.BUILD if kwargs.get('native', False) else MachineChoice.HOST
-        if environment.machines[for_machine].is_darwin() and self.check_macOS_recent_enough():
+        if (
+            (environment.machines[for_machine].system == 'darwin' and self.check_macOS_recent_enough())
+            or (environment.machines[for_machine].system == 'ios' and self.check_iOS_recent_enough())
+        ):
             self.detect(kwargs)
 
     def check_macOS_recent_enough(self) -> bool:
@@ -752,6 +755,18 @@ def check_macOS_recent_enough(self) -> bool:
         sdk_version = subprocess.run(cmd, capture_output=True, check=True, text=True).stdout.strip()
         return mesonlib.version_compare(sdk_version, '>=13.3')
 
+    def check_iOS_recent_enough(self) -> bool:
+        ios_version = platform.ios_ver().system
+        deploy_target = os.environ.get('IPHONEOS_DEPLOYMENT_TARGET', ios_version)
+        if not mesonlib.version_compare(deploy_target, '>=16.4'):
+            return False
+
+        # We also need the SDK to be >=16.4
+        sdk = "iphonesimulator" if platform.ios_ver().is_simulator else "iphoneos"
+        cmd = ['xcrun', '-sdk', sdk, '--show-sdk-version']
+        sdk_version = subprocess.run(cmd, capture_output=True, check=True, text=True).stdout.strip()
+        return mesonlib.version_compare(sdk_version, '>=16.4')
+
     def detect(self, kwargs: T.Dict[str, T.Any]) -> None:
         from .framework import ExtraFrameworkDependency
         dep = ExtraFrameworkDependency('Accelerate', self.env, kwargs)