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build: enable http_output, webserver, and metrics on macOS and Win#3827

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leogr wants to merge 2 commits intomasterfrom
fix/http-output-on-non-linux-platforms
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build: enable http_output, webserver, and metrics on macOS and Win#3827
leogr wants to merge 2 commits intomasterfrom
fix/http-output-on-non-linux-platforms

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@leogr leogr commented Mar 19, 2026

What type of PR is this?

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

/kind bug

/kind cleanup

/kind design

/kind documentation

/kind failing-test

/kind feature

/kind release

Any specific area of the project related to this PR?

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/area build

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What this PR does / why we need it:

The HTTP output, health webserver, and Prometheus metrics were excluded from macOS and windows builds as collateral damage when a Linux-only CMake gate was introduced to handle gRPC/protobuf dependencies (86e7692). Now that gRPC has been dropped (43aaffc), the original reason no longer applies.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

/milestone 0.44.0

Does this PR introduce a user-facing change?:

build: enable http_output, webserver, and metrics on macOS and Win

The HTTP output, health webserver, and Prometheus metrics were excluded from macOS builds as collateral damage when a Linux-only CMake gate was  introduced to handle gRPC/protobuf dependencies (86e7692). Now that  gRPC has been dropped (43aaffc), the original reason no longer applies.

Widen CMake gates and C++ preprocessor guards from Linux-only to  all non-Windows/non-Emscripten platforms. Also remove the dead c-ares dependency, which was only needed by gRPC.

Signed-off-by: Leonardo Grasso <me@leonardograsso.com>
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This PR may bring feature or behavior changes in the Falco engine and may require the engine version to be bumped.

Please double check userspace/engine/falco_engine_version.h file. See versioning for FALCO_ENGINE_VERSION.

/hold

@ekoops ekoops added this to the 0.44.0 milestone Mar 19, 2026
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ekoops previously approved these changes Mar 19, 2026
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/approve 0.44.0

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poiana commented Mar 19, 2026

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ekoops, leogr

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…gates

Rely solely on MINIMAL_BUILD and EMSCRIPTEN as semantic guards instead of explicit platform checks. MSVC builds are unaffected since  CompilerFlags.cmake forces MINIMAL_BUILD=ON, keeping these features  disabled. Non-MSVC Windows toolchains (MinGW, clang) can now build with http_output if curl and OpenSSL are available.

Signed-off-by: Leonardo Grasso <me@leonardograsso.com>
@leogr leogr changed the title wip: build: enable http_output, webserver, and metrics on macOS build: enable http_output, webserver, and metrics on macOS and Win Mar 23, 2026
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