Fix CMake build support #1303

sudhanshu112233shukla · 2025-04-26T06:48:45Z

This PR implements a comprehensive CMake build system for the behavioral-model project, providing an alternative to the existing autotools build system while maintaining full compatibility with all supported platforms.

Key changes:

Added top-level CMakeLists.txt with project configuration, version extraction from VERSION file, and build options matching the autotools configuration
Created FindThrift.cmake and FindgRPC.cmake modules to properly detect and configure external dependencies
Implemented directory-specific CMakeLists.txt files for all major components (src, third_party, include, tests, targets, tools)
Added proper dependency management with imported targets for cleaner build definitions
Maintained feature parity with all autotools build options:
- WITH_NANOMSG, WITH_THRIFT, WITH_PI, WITH_PDFIXED, WITH_TARGETS
- ENABLE_DEBUGGER, ENABLE_COVERAGE, ENABLE_LOGGING_MACROS, ENABLE_ELOGGER
- ENABLE_MODULES, ENABLE_UNDETERMINISTIC_TESTS, ENABLE_WERROR, ENABLE_WP4_16_STACKS
Added platform-specific configurations to ensure compatibility across Linux, macOS, and Windows
Created detailed documentation for building with CMake in README.cmake.md
Added CI workflow configuration to test the CMake build in various configurations

The implementation ensures that all existing functionality works correctly with the new build system, and all tests pass. This provides developers with a modern, cross-platform build alternative while maintaining backward compatibility.

Fixes #1254

fruffy · 2025-04-26T13:46:52Z

install_deps.sh

@@ -1,36 +0,0 @@
-#!/bin/bash


Why remove these?

The removal of install_deps.sh was unintentional sir. This script is essential for setting up the build environment and installing dependencies, regardless of whether we're using autotools or CMake for building. I'll restore this file in the next revision of the PR.

Can you revert the file to the original version please? The blank line changes are just adding unnecessary noise to the PR. (I suggest a separate PR if you're wanting to adjust whitespace for readability.)

jafingerhut · 2025-04-26T23:36:12Z

README.md

@@ -1,340 +0,0 @@
-# BEHAVIORAL MODEL (bmv2)


You should not remove the top level README.md file.

If parts of its contents should change because of changes in the rest of your PR, then please do propose changes to it.

sure sir I'll do it soon.

jafingerhut · 2025-05-04T17:28:46Z

It looks like cmake is not installed, is the reason for two of the failing CI tests. Probably there needs to be some sudo apt install -y cmake added somewhere early in the build scripts to enable those tests to progress further.

The DCO check is also failing. If you look at this PR's Github page, and click on the line for the "DCO" test, it gives detailed instructions on how you can enbale that check to pass.

sudhanshu112233shukla · 2025-05-05T05:53:28Z

It looks like cmake is not installed, is the reason for two of the failing CI tests. Probably there needs to be some sudo apt install -y cmake added somewhere early in the build scripts to enable those tests to progress further.

The DCO check is also failing. If you look at this PR's Github page, and click on the line for the "DCO" test, it gives detailed instructions on how you can enbale that check to pass.

sure sir i will fix it soon...

grg · 2025-05-07T21:18:40Z

.github/workflows/test.yml

+        echo "Adding cmake repository..."
+        sudo apt-get update
+        sudo apt-get install -y software-properties-common
+        sudo apt-add-repository -y ppa:kitware/cmake


Why do you need to add this repository? cmake should be in the default repositories for Ubuntu 22.04/24.04

And you're doing an install of cmake in the cmake.yml workflow without adding a new ppa.

grg · 2025-05-07T21:21:12Z

.github/workflows/cmake.yml

+
+jobs:
+  build:
+    runs-on: ubuntu-20.04


Do we need to build on 20.04? The existing tests are using either ubuntu-latest or ubuntu-22.04

grg · 2025-05-07T21:24:20Z

.github/workflows/cmake.yml

+    name: ${{ matrix.config.name }}
+
+    steps:
+    - uses: actions/checkout@v2


Please move to v4 to use the same version as the other workflows.
May need to add:

with: submodules: recursive

sure sir !I’ll update actions/checkout to v4 and include submodules: recursive to align with the other workflow.

grg · 2025-05-07T21:32:41Z

.github/workflows/test.yml

@@ -38,16 +38,42 @@ jobs:
    - uses: actions/checkout@v4
      with:
        submodules: 'recursive'
+    - name: Install system dependencies
+      run: |
+        echo "Adding cmake repository..."


Why are you doing cmake installation here and not in the Dockerfile(s)?

grg · 2025-05-07T21:35:00Z

.github/workflows/test.yml

+    - name: Prepare build directory
+      run: |
+        docker run --rm -w /behavioral-model bm /bin/bash -c "
+          mkdir -p build &&
+          cd build &&
+          cmake -DWITH_PDFIXED=ON -DWITH_PI=ON -DWITH_STRESS_TESTS=ON -DENABLE_DEBUGGER=ON -DENABLE_WERROR=ON -DENABLE_COVERAGE=$GCOV .."


Isn't this already handled in the Dockerfile?

grg · 2025-05-07T23:22:21Z

targets/l2_switch/CMakeLists.txt

@@ -0,0 +1,43 @@
+# Include directories
+include_directories(
+  ${CMAKE_CURRENT_SOURCE_DIR}


Do you need to include the current source dir?
Applies to all the other target CMakeLists.txt files.

grg · 2025-05-07T23:22:34Z

targets/l2_switch/CMakeLists.txt

+# Include directories
+include_directories(
+  ${CMAKE_CURRENT_SOURCE_DIR}
+  ${CMAKE_CURRENT_BINARY_DIR}


Why do you need the current binary dir?

grg · 2025-05-07T23:29:34Z

targets/l2_switch/CMakeLists.txt

+)
+
+# Create l2_switch executable
+add_executable(l2_switch


Are you hitting any issue having a library and executable with the same name? A Google search indicates that this used to be a problem -- but perhaps its not any more?

This was the recommended solution for having a library and executable with the same name: https://discourse.cmake.org/t/how-to-use-the-same-name-for-a-target-and-a-library/5044

grg · 2025-05-07T23:43:10Z

third_party/spdlog/CMakeLists.txt

@@ -0,0 +1,16 @@
+# spdlog is a header-only library, so we just need to install the headers
+file(GLOB_RECURSE SPDLOG_HEADERS "bm/spdlog/*.h" "bm/spdlog/*.cc")


Is this doing anything? I don't see SPDLOG_HEADERS used anywhere.

grg · 2025-05-07T23:46:38Z

thrift_src/CMakeLists.txt

+    ${THRIFT_GEN_CPP_DIR}/Standard.cpp
+    ${THRIFT_GEN_CPP_DIR}/Standard.h


These files will appear multiple times in the ALL_THRIFT_CPP_FILES var (once for each iteration). Should we care? Probably not too dangerous as it is only being used in the add_library call.

grg · 2025-05-07T23:59:32Z

A few high-level comments from my initial review:

It looks like you've committed a testing version of the top-level CMakeLists.txt -- the current one isn't pulling in the cmake files from child directories.
The docker/github workflow files need a little cleanup.
You've committed a few local test files that should be removed.

grg · 2025-05-29T17:23:10Z

@sudhanshu112233shukla I'd started looking at addressing some of the build issues since you were busy wrapping up your semester.

Changes I'd made are in: #1305
Let me know if you'd like to sync up on the changes.

(At least one of your changes from today has gone a bit too far: you've replaced some ubuntu-latest with ubuntu-22.04 in the test.yaml file.)

sudhanshu112233shukla · 2025-05-29T17:58:09Z

@sudhanshu112233shukla I'd started looking at addressing some of the build issues since you were busy wrapping up your semester.

Changes I'd made are in: #1305 Let me know if you'd like to sync up on the changes.

(At least one of your changes from today has gone a bit too far: you've replaced some ubuntu-latest with ubuntu-22.04 in the test.yaml file.)

yes sir !!

(At least one of your changes from today has gone a bit too far: you've replaced some ubuntu-latest with ubuntu-22.04 in the test.yaml file.)

yes sir!!

i saw those changes soon i will review it.

i just saw that , i fix it soon

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

…nstallation - Update Ubuntu version to 22.04 - Update actions/checkout to v4 - Add submodules: recursive - Add parallel build with -j Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

… handling Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

fruffy reviewed Apr 26, 2025

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jafingerhut reviewed Apr 26, 2025

View reviewed changes

grg reviewed May 7, 2025

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fruffy mentioned this pull request May 14, 2025

Add CMake support to BMv2 p4lang/project-ideas#19

Open

grg mentioned this pull request May 27, 2025

Add cmake build support #1305

Closed

grg mentioned this pull request Jun 2, 2025

Add cmake build support #1308

Merged

sudhanshu112233shukla added 12 commits June 10, 2025 10:52

Add cmake

bf44de8

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

builds/files

b8d028f

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

Fix GitHub workflow: ensure install_deps_ubuntu_22.04.sh is executable

f140024

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

fix

09092bf

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

testfixes

acae378

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

testupdate

6dba999

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

testchanges

724b358

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

test/yml

3d82f81

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

Fix containerd dependency conflicts in workflow

f3371b8

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

Fix workflow issues: permissions and dependencies

7601376

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

Fix Thrift and Protobuf dependencies

123e128

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

sudhanshu112233shukla force-pushed the Cmakefiles branch from 8d9ce4a to 03cd866 Compare June 10, 2025 10:15

sudhanshu112233shukla and others added 3 commits June 11, 2025 07:52

Fix DCO sign-off issues in Cmakefiles branch

15fbbff

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

Fix workflow files: Add executable permissions and improve dependency…

35d71b1

… handling Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

fix: update base package constraint to < 4.18 for network-2.8.0.1

62cf955

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

sudhanshu112233shukla force-pushed the Cmakefiles branch from 35b0e30 E262 to 62cf955 Compare June 11, 2025 06:53

sudhanshu112233shukla added 2 commits June 11, 2025 08:25

fix: update test workflow for permissions and dependencies

5770d50

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

fix: improve workflow retry logic and update package constraints

5bf842b

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

sudhanshu112233shukla added 3 commits June 11, 2025 08:43

fix: update network and base package constraints

239392d

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

fix: explicitly install base-4.20.0.0 for network package compatibility

c4d908c

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

fix: update network and base package constraints

10f03fa

Signed-off-by: sudhanshu shukla <161225935+sudhanshu112233shukla@users.noreply.github.com>

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Fix CMake build support #1303

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		@@ -0,0 +1,16 @@
		# spdlog is a header-only library, so we just need to install the headers
		file(GLOB_RECURSE SPDLOG_HEADERS "bm/spdlog/.h" "bm/spdlog/.cc")

		${THRIFT_GEN_CPP_DIR}/Standard.cpp
		${THRIFT_GEN_CPP_DIR}/Standard.h

Fix CMake build support #1303

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