{% set os = detect_api.detect_os() %}
{% set arch = detect_api.detect_arch() %}
{% set compiler, version, compiler_exe = detect_api.detect_default_compiler() %}
{% set compiler_version = version %}
{% if os == "Linux" %}
{% set compiler_version = detect_api.default_compiler_version(compiler, version) %}
{% endif %}
{% if os == "Macos" %}
{# Minimum macOS the dependencies target. #}
{# Without this, Conan builds each dependency against the (possibly newer) host SDK, so the #}
{# dependency objects target a newer macOS than the binary and the linker warns. #}
{# Keep at or below CMAKE_OSX_DEPLOYMENT_TARGET in CMakeLists.txt. #}
{% set min_macos_version = "15.0" %}
{% endif %}

[settings]
os={{ os }}
arch={{ arch }}
build_type=Debug
compiler={{ compiler }}
compiler.version={{ compiler_version }}
compiler.cppstd=23
{% if os == "Windows" %}
compiler.runtime=static
{% else %}
compiler.libcxx={{ detect_api.detect_libcxx(compiler, version, compiler_exe) }}
{% endif %}
{% if os == "Macos" %}
os.version={{ min_macos_version }}
{% endif %}

[conf]
{# The Boost recipe builds with b2, which doesn't use Conan's toolchain files. #}
{# Instead it hand-rolls the compiler for user-config.jam, #}
{# and its fallback probes a version-suffixed binary (e.g. `g++-15`) before plain `g++`. #}
{# Inside the Nix shell the wrapper only provides `g++`/`gcc` (no `-15` suffix), #}
{# so on a host that also has a system `g++-15` the probe escapes Nix #}
{# and picks the system compiler, which is mismatched with the Nix libraries #}
{# and breaks the build (e.g. Boost.Stacktrace link checks fail). #}
{# Pinning the executables here short-circuits that probe so Boost (and the rest of the toolchain) #}
{# resolve the same compiler. #}
{# Not part of the package ID, so binaries stay shareable. #}
{% if os != "Windows" %}
{% set cc_exe  = {"gcc": "gcc",  "clang": "clang",   "apple-clang": "clang"}.get(compiler) %}
{% set cxx_exe = {"gcc": "g++",  "clang": "clang++", "apple-clang": "clang++"}.get(compiler) %}
tools.build:compiler_executables={'c':'{{ cc_exe }}','cpp':'{{ cxx_exe }}'}
{% endif %}

{# By default, Conan tries to reuse binaries built with different cppstd versions. #}
{# We want to avoid that to improve reproduceability, so we add the cppstd version to the package ID. #}
{# More info: https://docs.conan.io/2/reference/extensions/binary_compatibility.html #}
user.package:cppstd_version=23
tools.info.package_id:confs+=["user.package:cppstd_version"]

{% if os == "Macos" %}
[buildenv]
{# os.version adds -mmacosx-version-min to compiler command lines, #}
{# but Boost.Context's b2 assembly (.S) rule ignores it, #}
{# so those objects keep the host SDK version and still warn at link time. #}
{# clang's assembler honors this env var regardless, pinning them. #}
{# Scoped to boost/* since it is the only gap. #}
boost/*:MACOSX_DEPLOYMENT_TARGET={{ min_macos_version }}
{% endif %}