fix(driver): hoist flags declaration to the top of f_sys_accept4_x

[ekoops]

What type of PR is this?

Uncomment one (or more) /kind <> lines:

/kind bug

/kind cleanup

/kind design

/kind documentation

/kind failing-test

/kind test

/kind feature

/kind sync

Any specific area of the project related to this PR?

Uncomment one (or more) /area <> lines:

/area API-version

/area build

/area automation

/area drivers

/area driver-kmod

/area driver-modern-bpf

/area libscap-engine-kmod

/area libscap-engine-modern-bpf

/area libscap-engine-nodriver

/area libscap-engine-noop

/area libscap-engine-source-plugin

/area libscap-engine-savefile

/area libscap

/area libpman

/area libsinsp

/area tests

/area proposals

Does this PR require a change in the driver versions?

/version driver-API-version-major

/version driver-API-version-minor

/version driver-API-version-patch

/version driver-SCHEMA-version-major

/version driver-SCHEMA-version-minor

/version driver-SCHEMA-version-patch

What this PR does / why we need it:

This prevents some build failures if the compilation toolchain uses pedantic flags.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

/milestone 10.1.0+driver

Does this PR introduce a user-facing change?:

NONE

[github-actions]

Please double check driver/SCHEMA_VERSION file. See versioning.

/hold

[ekoops]

Testing against kernel/distro matrix: https://github.com/falcosecurity/libs/actions/runs/25742128518/job/75595174915

[ekoops]

Please double check driver/SCHEMA_VERSION file. See versioning.

/hold

False positive. I'm gonna unhold once the CI is green

[irozzo-1A]

/lgtm

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ekoops, irozzo-1A, leogr, therealbobo

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• driver/OWNERS [ekoops,irozzo-1A,leogr,therealbobo]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.73%. Comparing base (1cbbe78) to head (9a05bcf).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2994   +/-   ##
=======================================
  Coverage   75.73%   75.73%           
=======================================
  Files         299      299           
  Lines       33164    33164           
  Branches     5168     5168           
=======================================
  Hits        25116    25116           
  Misses       8048     8048           

Flag	Coverage Δ
libsinsp	75.73% <ø> (ø)

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[ekoops]

X64 Matrix

KERNEL	CMAKE-CONFIGURE	KMOD BUILD	KMOD SCAP-OPEN	MODERN-BPF SCAP-OPEN
amazonlinux2-5.10	🟢	🟢	🟢	🟢
amazonlinux2-5.15	🟢	🟢	🟢	🟢
amazonlinux2-5.4	🟢	🟢	🟢	🟡
amazonlinux2022-5.15	🟢	🟢	🟢	🟢
amazonlinux2023-6.1	🟢	🟢	🟢	🟢
archlinux-6.0	🟢	🟢	🟢	🟢
archlinux-6.7	🟢	🟢	🟢	🟢
centos-3.10	🟢	🟢	🟢	🟡
centos-4.18	🟢	🟢	🟢	🟢
centos-5.14	🟢	🟢	🟢	🟢
fedora-5.17	🟢	🟢	🟢	🟢
fedora-5.8	🟢	🟢	🟢	🟢
fedora-6.2	🟢	🟢	🟢	🟢
oraclelinux-3.10	🟢	🟢	🟢	🟡
oraclelinux-4.14	🟢	🟢	🟢	🟡
oraclelinux-5.15	🟢	🟢	🟢	🟢
oraclelinux-5.4	🟢	🟢	🟢	🟡
ubuntu-5.8	🟢	🟢	🟢	🟡
ubuntu-6.5	🟢	🟢	🟢	🟢

ARM64 Matrix

KERNEL	CMAKE-CONFIGURE	KMOD BUILD	KMOD SCAP-OPEN	MODERN-BPF SCAP-OPEN
amazonlinux2-5.4	🟢	🟢	🟢	🟡
amazonlinux2022-5.15	🟢	🟢	🟢	🟢
fedora-6.2	🟢	🟢	🟢	🟢
oraclelinux-4.14	🟢	🟢	🟢	🟡
oraclelinux-5.15	🟢	🟢	🟢	🟢
ubuntu-6.5	🟢	🟢	🟢	🟢

[ekoops]

/hold cancel