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fix: some compiler warnings (func def. w/o decl.) #1887

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federico-sysdig
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What type of PR is this?
/kind cleanup

Any specific area of the project related to this PR?
/area build

Does this PR require a change in the driver versions?
No

What this PR does / why we need it:
Remove some compiler warnings on functions being defined without a prior declaration.
This happens with newer compilers that have more in-depth static code checks. In this case it is enough to define the functions as static, they are used only within the compilation unit anyway.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

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Please double check driver/SCHEMA_VERSION file. See versioning.

/hold


static int32_t scap_gvisor_init_platform(scap_platform* platform, char* lasterr, scap_engine_handle engine, struct scap_open_args* oargs)
namespace {
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Just curious: why are you suggesting an anonymous namespace rather than C-style static functions? Was there a compiler warning for it? Is there a specific reason? Thanks!

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They should be equivalent, they give the function internal linkage. I have read on advice to prefer anonymous namespaces for reasons I can't recall, but I suppose it's more a fashion than a deep technical reason.
For this reason in this case I could (should?) have kept the static. I probably made it like this because it's more uniform with another PR I have created where the anonymous namespace was created to put inside a class definition that had a duplicate name so that the duplication could be handled by the linker.
Not a problem if you prefer to keep the old syntax, the only advantage here could be a shorter function signature to read.
FTR, the definition of the object scap_gvisor_engine has been put inside the extern "C" as its declaration elsewhere is inside such a block.

@LucaGuerra
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/milestone 0.18.0

@poiana poiana added this to the 0.18.0 milestone May 31, 2024
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/approve

@poiana
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poiana commented Jun 4, 2024

LGTM label has been added.

Git tree hash: 426299fd69b031bed845ae8989cbde96516aefbd

@poiana poiana added the approved label Jun 4, 2024
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poiana commented Jun 4, 2024

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: FedeDP, federico-sysdig, LucaGuerra

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@FedeDP
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FedeDP commented Jun 4, 2024

/unhold

@poiana poiana merged commit 7472524 into falcosecurity:master Jun 4, 2024
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4 participants