add flags in windows

Author: rayandrew

.github/workflows/install.yml

@@ -32,7 +32,7 @@ jobs:
         rm -rf build
 
     - name: configure
-      run: cmake -Htest -Bbuild -DTEST_INSTALLED_VERSION=1
+      run: BOOST_ROOT=$BOOST_ROOT_1_72_0 cmake -Htest -Bbuild -DTEST_INSTALLED_VERSION=1
 
     - name: build
       run: cmake --build build --config Debug -j4

cmake/Boost.cmake

@@ -11,3 +11,9 @@ set(Boost_USE_RELEASE_LIBS ON) # only find release libs
 set(Boost_USE_MULTITHREADED ON)
 set(Boost_USE_STATIC_RUNTIME OFF)
 find_package(Boost 1.70.0 REQUIRED COMPONENTS system)
+
+# attempt fixes from @al-cheb
+# https://github.com/actions/virtual-environments/issues/370#issuecomment-586209745
+if(WIN32)
+    add_definitions(-DBOOST_ALL_NO_LIB -DBOOST_PROGRAM_OPTIONS_DYN_LINK -DBOOST_IOSTREAMS_DYN_LINK -DBOOST_THREAD_DYN_LINK)
+endif()