build: pin -std=c11 for instrument-hooks core.c

[not-matthias]

No description provided.

[codspeed-hq]

Merging this PR will improve performance by 2.8%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 22 improved benchmarks
❌ 15 regressed benchmarks
✅ 240 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	WallTime	test_sum_of_squares[sum_of_squares_sum_labmda_product]	279.3 µs	301.2 µs	-7.27%
❌	Memory	test_multiprocessing_map[10000]	3.5 MB	3.8 MB	-7.25%
❌	WallTime	test_multiprocessing_map[1000]	57.6 ms	61.2 ms	-5.9%
❌	WallTime	test_is_complete[board0]	1.8 µs	1.9 µs	-4.8%
❌	WallTime	test_combination_sum[candidates0-8]	11.3 µs	11.8 µs	-4.73%
❌	WallTime	test_hostname_resolution[google.com]	396.6 µs	413 µs	-3.98%
❌	WallTime	test_open_close_fd[10]	92.1 µs	95.8 µs	-3.82%
❌	WallTime	test_open_knight_tour[1]	4.3 µs	4.4 µs	-3.73%
❌	WallTime	test_make_highshelf	7.6 µs	7.9 µs	-3.69%
❌	WallTime	test_array_alloc[100000]	189 µs	194.7 µs	-2.91%
❌	WallTime	test_pipe_communication[1000]	6.5 ms	6.7 ms	-2.73%
❌	WallTime	test_generate_all_permutations[sequence1]	163.8 µs	168.4 µs	-2.72%
❌	WallTime	test_color[graph0-3]	30.5 µs	31.1 µs	-2.2%
❌	WallTime	test_fs_write[1000000]	2.7 ms	2.7 ms	-2.16%
❌	WallTime	test_hostname_resolution[localhost]	121.2 µs	123.8 µs	-2.07%
⚡	Memory	test_multiprocessing_map[1000]	4.8 MB	3.3 MB	+46%
⚡	Memory	test_multiprocessing_map[100]	3.5 MB	2.8 MB	+22.59%
⚡	WallTime	test_tcp_connection[1.1.1.1-53]	964.4 µs	837 µs	+15.22%
⚡	Memory	test_multiprocessing_map[10]	3.9 MB	3.4 MB	+13.97%
⚡	WallTime	test_sum_of_squares[sum_of_squares_sum_labmda_power]	359.8 µs	325.7 µs	+10.46%
...	...	...	...	...	...

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Tip

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---

_{Comparing cod-2953-use-stdc11-for-instrument-hooks-in-integrations (65832cc) with master (b2d12d8)}

[greptile-apps]

Greptile Summary

Pins the C standard to C11 when building the native dist_instrument_hooks extension by adding -std=c11 to extra_compile_args in setup.py. This aligns the Python package build with how the upstream instrument-hooks CI already compiles core.c (see test-gcc-versions and test-clang-versions jobs), fixing build failures on stricter toolchains that default to an older C standard.

• Adds -std=c11 as the first entry in extra_compile_args, matching the standard used by the upstream gcc/clang CI jobs that compile dist/core.c.
• The flag is not part of upstream's COMMON_CFLAGS env var (which the code comment references for sync), but is applied per-job alongside it — the fix is correct regardless.

Confidence Score: 5/5

Safe to merge — adds a single, well-supported compiler flag that the upstream project already requires when building the same source file.

The change is a one-line addition of -std=c11 to the compile flags for core.c. The upstream instrument-hooks CI already passes -std=c11 explicitly when compiling core.c with both GCC (versions 9–15) and Clang (versions 13–19), confirming the flag is expected and correct. All target platforms (Linux x86_64/aarch64, macOS arm64) use compilers that support C11 without issue.

No files require special attention.

Important Files Changed

Filename	Overview
setup.py	Adds -std=c11 to the C extension compile flags, consistent with how instrument-hooks CI tests core.c (gcc/clang version jobs pass -std=c11 alongside COMMON_CFLAGS).

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[setup.py] --> B{IS_EXTENSION_BUILDABLE?}
    B -- Yes --> C[Build native_extension]
    B -- No --> D[No ext_modules]
    C --> E["extra_compile_args\n-std=c11 NEW\n-Wno-format\n-Wno-format-security\n-Wno-unused-but-set-variable\n-Wno-unused-const-variable\n-Wno-type-limits\n-Wno-uninitialized"]
    E --> F[Compile instrument_hooks_module.c]
    E --> G[Compile instrument-hooks/dist/core.c]
    F & G --> H[dist_instrument_hooks.so]

Loading

%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
flowchart TD
    A[setup.py] --> B{IS_EXTENSION_BUILDABLE?}
    B -- Yes --> C[Build native_extension]
    B -- No --> D[No ext_modules]
    C --> E["extra_compile_args\n-std=c11 NEW\n-Wno-format\n-Wno-format-security\n-Wno-unused-but-set-variable\n-Wno-unused-const-variable\n-Wno-type-limits\n-Wno-uninitialized"]
    E --> F[Compile instrument_hooks_module.c]
    E --> G[Compile instrument-hooks/dist/core.c]
    F & G --> H[dist_instrument_hooks.so]

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