early-access version 2853

externals/vcpkg/ports/eigen3/remove_configure_checks.patch

@@ -0,0 +1,37 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index f3e69b845..12fb2188d 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -66,12 +66,14 @@ option(EIGEN_TEST_CXX11 "Enable testing with C++11 and C++11 features (e.g. Tens
+ 
+ 
+ macro(ei_add_cxx_compiler_flag FLAG)
++  if(FALSE) # Since eigen3 is header only and vcpkg does not build tests this can be disabled by default. 
+   string(REGEX REPLACE "-" "" SFLAG1 ${FLAG})
+   string(REGEX REPLACE "\\+" "p" SFLAG ${SFLAG1})
+   check_cxx_compiler_flag(${FLAG} COMPILER_SUPPORT_${SFLAG})
+   if(COMPILER_SUPPORT_${SFLAG})
+     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${FLAG}")
+   endif()
++  endif()
+ endmacro()
+ 
+ check_cxx_compiler_flag("-std=c++11" EIGEN_COMPILER_SUPPORT_CPP11)
+@@ -142,7 +144,7 @@ endif()
+ 
+ set(EIGEN_TEST_MAX_SIZE "320" CACHE STRING "Maximal matrix/vector size, default is 320")
+ 
+-if(NOT MSVC)
++if(NOT MSVC AND FALSE)
+   # We assume that other compilers are partly compatible with GNUCC
+ 
+   # clang outputs some warnings for unknown flags that are not caught by check_cxx_compiler_flag
+@@ -330,7 +332,7 @@ if(NOT MSVC)
+     endif()
+   endif()
+ 
+-else()
++elseif(FALSE)
+ 
+   # C4127 - conditional expression is constant
+   # C4714 - marked as __forceinline not inlined (I failed to deactivate it selectively)