CMakePresets.json

{
  "version": 3,
  "configurePresets": [
    {
      "name": "base",
      "hidden": true,
      "description": "Shared settings inherited by all presets",
      "binaryDir": "${sourceDir}/build/${presetName}",
      "cacheVariables": {
        "CMAKE_CXX_STANDARD":          { "type": "STRING", "value": "23" },
        "CMAKE_CXX_STANDARD_REQUIRED": { "type": "BOOL",   "value": "ON" },
        "CMAKE_CXX_EXTENSIONS":        { "type": "BOOL",   "value": "OFF" },

        "_comment_compiler": "Pin the Spack GCC 15 toolchain. The Debian system compiler (/usr/bin/c++, GCC 12.2) lacks the C++23 features the Wire-Cell/phlex headers require (std::forward_like, std::ranges::to, template-body static_assert). CMake caches the compiler on first configure, so it MUST be set here to avoid silently pinning GCC 12. gcc@15 is deliberately NOT in the Spack view (a compiler in the app view drags in a gcc12-bootstrap subtree that duplicates/collides on zstd, zlib, etc.), so resolve it from the store via env vars set in .envrc:  export CC=\"$(spack -e wcph location -i gcc@15)/bin/gcc\";  export CXX=\"$(spack -e wcph location -i gcc@15)/bin/g++\".  Using $env{...} keeps this robust to gcc rebuilds (no hard-coded store hash).",
        "CMAKE_C_COMPILER":   { "type": "FILEPATH", "value": "$env{CC}" },
        "CMAKE_CXX_COMPILER": { "type": "FILEPATH", "value": "$env{CXX}" },

        "_comment_prefix": "The Spack view provides Arrow, WireCell, Boost, TBB, etc.",
        "CMAKE_PREFIX_PATH": { "type": "PATH", "value": "/devel/ddm/local" }
      }
    },
    {
      "name": "default",
      "displayName": "Default (optimized with debug symbols)",
      "description": "RelWithDebInfo: -O2 optimisation, full debug symbols. Good for day-to-day development and profiling.",
      "inherits": "base",
      "cacheVariables": {
        "CMAKE_BUILD_TYPE": { "type": "STRING", "value": "RelWithDebInfo" }
      }
    },
    {
      "name": "stripped",
      "displayName": "Stripped (optimized, no debug symbols)",
      "description": "Release: -O2 optimisation, no debug symbols. Use for production / installation.",
      "inherits": "base",
      "cacheVariables": {
        "CMAKE_BUILD_TYPE": { "type": "STRING", "value": "Release" }
      }
    },
    {
      "name": "debug",
      "displayName": "Debug (unoptimized with debug symbols)",
      "description": "Debug: -O0, full debug symbols. Use when stepping through code in a debugger.",
      "inherits": "base",
      "cacheVariables": {
        "CMAKE_BUILD_TYPE": { "type": "STRING", "value": "Debug" }
      }
    }
  ],
  "buildPresets": [
    { "name": "default",  "configurePreset": "default" },
    { "name": "stripped", "configurePreset": "stripped" },
    { "name": "debug",    "configurePreset": "debug" }
  ],
  "testPresets": [
    { "name": "default",  "configurePreset": "default",  "output": { "outputOnFailure": true } },
    { "name": "stripped", "configurePreset": "stripped", "output": { "outputOnFailure": true } },
    { "name": "debug",    "configurePreset": "debug",    "output": { "outputOnFailure": true } }
  ]
}