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C / C++ & CMake

CMake, Make, and compiler/linker errors - fixed.

Fix C/C++ CI failures: CMake configuration, Make errors, compiler and linker failures, and missing library/header issues.

CMake & Make

Configure, generate, build errors.

"Could NOT find <Package>"Fix CMake "Could NOT find <Package> (missing: <Package>_DIR)" in CI - a find_package() dependency is not "does not appear to contain CMakeLists.txt"Fix CMake "The source directory ... does not appear to contain CMakeLists.txt" in CI - wrong -S path, missing "Flow control ... not properly nested"Fix CMake "Flow control statements are not properly nested" in CI - an if/foreach/function block is missing "Invalid setting"Fix Conan "ERROR: Invalid setting X is not a valid 'settings.compiler.version' value" in CI - the profile "missing and no known rule to make it"Fix Ninja "error: X, needed by Y, missing and no known rule to make it" in CI - a build input does not exist

Compile

Compiler errors and flags.

ccache zero hit rate in CIFix ccache showing 0% hit rate in CI - the CCACHE_DIR is not restored between runs, so every job starts with

Link & libraries

Linker errors, missing libs.

"collect2: error: ld returned 1"Fix gcc "collect2: error: ld returned 1 exit status" in CI - a summary line that means the linker failed; the "undefined reference to std::filesystem"Fix ld "undefined reference to std::filesystem" in CI - older GCC/Clang ship filesystem in a separate library

Explore other topics

GitHub ActionsWorkflow, runner, and YAML errors - diagnosed and fixed. Node.js & npmnpm, yarn, and pnpm failures in CI - solved. DockerBuild, run, compose, and registry errors - explained. Pythonpip, poetry, venv, and pytest failures - fixed. Java & JVMMaven, Gradle, and JVM failures in CI - resolved. GoGo build, module, and test failures - diagnosed.