Require Boost 1.73

An undefined `PTHREAD_STACK_MIN` causes a compile failure otherwise.

Author: Flamefire

.github/workflows/unit-tests.yml

@@ -1,4 +1,4 @@
-# Copyright (C) 2005 - 2021 Settlers Freaks <sf-team at siedler25.org>
+# Copyright (C) 2005 - 2025 Settlers Freaks <sf-team at siedler25.org>
 #
 # SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -12,9 +12,6 @@ concurrency:
   group: ${{format('tests-{0}:{1}', github.repository, github.ref)}}
   cancel-in-progress: true
 
-env:
-  BOOST_VERSION: 1.69.0
-
 defaults:
   run:
     shell: bash
@@ -44,16 +41,16 @@ jobs:
     strategy:
       matrix:
         include:
-          - { compiler: gcc-9,    os: ubuntu-22.04, buildType: Release }
-          - { compiler: gcc-9,    os: ubuntu-22.04, buildType: Debug, coverage: true }
-          - { compiler: clang,    os: macos-13,     buildType: Debug, boostVersion: 1.81.0 } # New libc++ only supported since 1.81
+          - { compiler: gcc-9,    os: ubuntu-22.04, buildType: Release, boostVersion: 1.73.0 }
+          - { compiler: gcc-9,    os: ubuntu-22.04, buildType: Debug,   boostVersion: 1.73.0, coverage: true }
+          - { compiler: clang,    os: macos-13,     buildType: Debug,   boostVersion: 1.81.0 } # New libc++ only supported since 1.81
           # Latest GCC
-          - { compiler: gcc-13,   os: ubuntu-24.04, buildType: Debug, boostVersion: 1.87.0 }
+          - { compiler: gcc-13,   os: ubuntu-24.04, buildType: Debug,   boostVersion: 1.87.0 }
           # Latest Clang
-          - { compiler: clang-12, os: ubuntu-22.04, buildType: Debug, boostVersion: 1.73.0 }
+          - { compiler: clang-12, os: ubuntu-22.04, buildType: Debug,   boostVersion: 1.73.0 }
           # Windows
-          - { compiler: msvc,     os: windows-2019, buildType: Debug,                        generator: 'Visual Studio 16 2019' }
-          - { compiler: msvc,     os: windows-2022, buildType: Debug, boostVersion: 1.87.0 }
+          - { compiler: msvc,     os: windows-2019, buildType: Debug,   boostVersion: 1.73.0, generator: 'Visual Studio 16 2019' }
+          - { compiler: msvc,     os: windows-2022, buildType: Debug,   boostVersion: 1.87.0 }
 
     runs-on: ${{matrix.os}}
     env:

CMakeLists.txt

@@ -35,7 +35,7 @@ endif()
 
 
 include(RttrBoostCfg)
-find_package(Boost 1.69 REQUIRED COMPONENTS system filesystem iostreams)
+find_package(Boost 1.73 REQUIRED COMPONENTS system filesystem iostreams)
 
 include(RttrTestingCfg)
 if(isTopLevel)