/linked_list/build
Start 1: alloc_and_free
1/1 Test #1: alloc_and_free ................... Passed 0.17 sec
100% tests passed, 0 tests failed out of 1
Total Test time (real) = 0.17 sec
$ pkg-config --libs criterion
-L/nix/store/p0nnffxh9jrldxz5day2yvpvsa1pq6i3-criterion-2.4.2/lib -Wl,-rpath,/nix/store/p0nnffxh9jrldxz5day2yvpvsa1pq6i3-criterion-2.4.2/lib -lcriterion
$ pkg-config --cflags --libs criterion
-I/nix/store/i3qwlyca06xx1fgdj1pcr4bzsyvfq4by-criterion-2.4.2-dev/include -L/nix/store/p0nnffxh9jrldxz5day2yvpvsa1pq6i3-criterion-2.4.2/lib -Wl,-rpath,/nix/store/p0nnffxh9jrldxz5day2yvpvsa1pq6i3-criterion-2.4.2/lib -lcriterion
$ ls /nix/store/p0nnffxh9jrldxz5day2yvpvsa1pq6i3-criterion-2.4.2
lib share
$ ls /nix/store/p0nnffxh9jrldxz5day2yvpvsa1pq6i3-criterion-2.4.2/lib
libcriterion.3.dylib libcriterion.a libcriterion.dylib
$ ls /nix/store/i3qwlyca06xx1fgdj1pcr4bzsyvfq4by-criterion-2.4.2-dev
include lib nix-support
$ ls /nix/store/i3qwlyca06xx1fgdj1pcr4bzsyvfq4by-criterion-2.4.2-dev/lib/pkgconfig
criterion.pc
$ cat /nix/store/i3qwlyca06xx1fgdj1pcr4bzsyvfq4by-criterion-2.4.2-dev/lib/pkgconfig/criterion.pc
prefix=/nix/store/p0nnffxh9jrldxz5day2yvpvsa1pq6i3-criterion-2.4.2
includedir=/nix/store/i3qwlyca06xx1fgdj1pcr4bzsyvfq4by-criterion-2.4.2-dev/include
libdir=${prefix}/lib
Name: criterion
Description: A KISS, Cross platform unit testing framework for C and C++
URL: https://snai.pe/git/criterion
Version: 2.4.2
Requires.private: boxfort, libffi, libgit2, nanomsg
Libs: -Wl,-rpath,${libdir} -L${libdir} -lcriterion
Libs.private: -lintl /nix/store/m4k69gc780vwjha885782ipwa03qgyb2-nanopb-runtime-0.4.9.1/lib/libprotobuf-nanopb.a -lm /nix/store/m4k69gc780vwjha885782ipwa03qgyb2-nanopb-runtime-0.4.9.1/lib/libprotobuf-nanopb.a
Cflags: -I${includedir}
```
## Project structure
```bash
- flake.nix
- CMakeLists.txt
- cmake
| - FindCriterion.cmake
- include
| - linked_list.h
- lib
| - CMakeLists.txt
| - linked_list.c
- tests
| - CMakeLists.txt
| - test_alloc_and_free.c
```
## Files
### ./CMakeLists.txt
```cmake
cmake_minimum_required(VERSION 3.31...4.0)
project(
c-linked-list
VERSION 1.0
LANGUAGES C
DESCRIPTION "A linked list implementation in C."
)
include(FetchContent)
include(CTest)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake")
enable_testing()
add_subdirectory("lib")
add_subdirectory("tests")
```
### ./cmake/FindCriterion.cmake
```cmake
find_package(PkgConfig REQUIRED)
pkg_check_modules(PC_Criterion REQUIRED IMPORTED_TARGET criterion)
```
### ./tests/CMakeLists.txt
```cmake
add_executable(test_alloc_and_free test_alloc_and_free.c)
find_package(Criterion REQUIRED)
# Tried explicitly including directorties, but that doesn't help.
# target_include_directories(test_alloc_and_free PUBLIC ${PC_Criterion_INCLUDE_DIRS})
# Tried changing from PRIVATE to PUBLIC when linking, but that doesn't help either.
# Also tried using the `FindCriterion.cmake` as specified in the Criterion examples, but that doesn't help either.
# https://github.com/Snaipe/Criterion/blob/bleeding/dev/cmake/cmake/FindCriterion.cmake
target_link_libraries(test_alloc_and_free PRIVATE c_linked_list PkgConfig::PC_Criterion)
add_test(NAME alloc_and_free COMMAND test_alloc_and_free)
```
### ./flake.nix
```auto
{
inputs = {
nixpkgs = {
url = "github:NixOS/nixpkgs/release-25.05";
};
nixpkgs-unstable = {
url = "github:NixOS/nixpkgs/nixpkgs-unstable";
};
};
outputs = {
self,
nixpkgs,
nixpkgs-unstable,
...
}@inputs: let
inherit (self) outputs;
forAllSystems = nixpkgs.lib.genAttrs [
"x86_64-linux"
"aarch64-darwin"
];
in {
devShells = forAllSystems (
system: let
pkgs = nixpkgs.legacyPackages.${system};
pkgs-unstable = nixpkgs-unstable.legacyPackages.${system};
in {
default = pkgs.mkShell {
nativeBuildInputs = [
pkgs.clang_20
pkgs.lldb
pkgs.cmake
pkgs.pkg-config
];
buildInputs = [
# ===== Required by Criterion ===== #
pkgs.boxfort.dev
pkgs.libffi.dev
pkgs.libgit2.dev
pkgs.pcre2.dev
pkgs.nanomsg
# ===== Required by Criterion ===== #
pkgs.criterion.dev
];
};
}
);
};
}
```
---
### Author:  [@skittishdev](https://discourse.cmake.org/u/skittishdev)
#### Post date: [September 3, 2025, 5:35pm UTC](https://discourse.cmake.org/t/how-to-correctly-generate-compile-commands-json-for-library-dependency-using-pkgconfig/15135/3 "2025-09-03T17:35:15Z")
Correct link to Criterion: [GitHub - Snaipe/Criterion: A cross-platform C and C++ unit testing framework for the 21st century](https://github.com/Snaipe/Criterion). The original post links to the Haskell package by mistake, and I’m unable to edit it.
---
### Author:  [@skittishdev](https://discourse.cmake.org/u/skittishdev)
#### Post date: [September 3, 2025, 5:53pm UTC](https://discourse.cmake.org/t/how-to-correctly-generate-compile-commands-json-for-library-dependency-using-pkgconfig/15135/4 "2025-09-03T17:53:13Z")
I was able to generate the correct `-I` flags by adding this to my [./cmake/FindCriterion.cmake](https://discourse.cmake.org/t/how-to-correctly-generate-compile-commands-json-for-library-dependency-using-pkgconfig/15135#p-39121-cmakefindcriterioncmake-8)
```cmake
add_compile_options(${PC_Criterion_CFLAGS})
```
I was expecting that the cflags were also added when the `IMPORTED_TARGET` was linked (like the headers are included). But apparently not.
---
### Author:  [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [February 19, 2026, 9:01pm UTC](https://discourse.cmake.org/t/how-to-correctly-generate-compile-commands-json-for-library-dependency-using-pkgconfig/15135/7 "2026-02-19T21:01:24Z")
That’s interesting; I’d expect them to be added. @vito.gamberini ?