https://salsa.debian.org/tti0/python3-pyroaring/-/blob/debian/latest/debian/patches/0001-Link-against-system-CRoaring-rather-than-vendor-copy.patch

From 1092a1ea9bc5ae6d185a00a9949dbf1cb8b84499 Mon Sep 17 00:00:00 2001
From: Theodore Tucker <theodore@tti0.net>
Date: Tue, 17 Mar 2026 16:55:38 +0000
Subject: [PATCH] Link against system CRoaring rather than vendor copy
Forwarded: not-needed

--- a/setup.py
+++ b/setup.py
@@ -33,54 +33,19 @@ except (IOError, ImportError, RuntimeError):
     print('Could not generate long description.')
     long_description = ''
 
-
-if PLATFORM_WINDOWS:
-    # MSVC defaults to C++14, so no explicit C++ standard flag is needed.
-    # roaring.c requires C11 for features like alignof and _Static_assert.
-    ext_compile_args = []
-    c_compile_args = ['/std:c11']
-else:
-    c_compile_args = ['-D__STDC_LIMIT_MACROS', '-D__STDC_CONSTANT_MACROS', '-D _GLIBCXX_ASSERTIONS']
-    if PLATFORM_MACOSX:
-        c_compile_args.append('-mmacosx-version-min=10.14')
-    if 'DEBUG' in os.environ:
-        c_compile_args.extend(['-O0', '-g'])
-    else:
-        c_compile_args.append('-O3')
-    if 'ARCHI' in os.environ:
-        if os.environ['ARCHI'] != "generic":
-            c_compile_args.append('-march=%s' % os.environ['ARCHI'])
-    # The '-march=native' flag is not universally allowed. In particular, it
-    # will systematically fail on aarch64 systems (like the new Apple M1 systems). It
-    # also creates troubles under macOS with pip installs and requires ugly workarounds.
-    # The best way to handle people who want to use -march=native is to ask them
-    # to pass ARCHI=native to their build process.
-    # else:
-    #    c_compile_args.append('-march=native')
-    ext_compile_args = c_compile_args + ['-std=c++11']
-    c_compile_args = c_compile_args + ['-std=c11']
+compile_args = ['-D__STDC_LIMIT_MACROS', '-D__STDC_CONSTANT_MACROS', '-D _GLIBCXX_ASSERTIONS']
 
 pyroaring_module = Extension(
     'pyroaring',
     sources=[os.path.join(PKG_DIR, 'pyroaring.pyx')],
-    extra_compile_args=ext_compile_args,
+    extra_compile_args=compile_args + ["-std=c++11"],
     language='c++',
+    libraries=['roaring'],
 )
 
-# roaring.c is compiled as a separate static library because it must be compiled
-# as C (not C++), with a C11 standard flag.
-libraries = [(
-    'croaring',
-    {
-        'sources': [os.path.join(PKG_DIR, 'roaring.c')],
-        'cflags': c_compile_args,
-    },
-)]
-
 setup(
     name='pyroaring',
     ext_modules=[pyroaring_module],
-    libraries=libraries,
     package_data={'pyroaring': ['py.typed', '__init__.pyi']},
     packages=['pyroaring'],
     version=VERSION,
-- 
2.47.3