Fix failing builds and update CI on push.

Specifically:
- Fixed ctz on 32-bit arm (where `uint64_t` is `unsigned long long`)
- Fixed build of random_cpp11 snippet when C++11 is disabled
- Updated CI scripts to run windows on push, and added a no-c++11 test

CMakeLists.txt

@@ -338,7 +338,7 @@ if (EIGEN_BUILD_TESTING)
 
   check_cxx_compiler_flag("-std=c++11" EIGEN_COMPILER_SUPPORT_CPP11)
 
-  option(EIGEN_TEST_CXX11 "Enable testing with C++11 and C++11 features (e.g. Tensor module)." EIGEN_COMPILER_SUPPORT_CPP11)
+  option(EIGEN_TEST_CXX11 "Enable testing with C++11 and C++11 features (e.g. Tensor module)." ${EIGEN_COMPILER_SUPPORT_CPP11})
   if(EIGEN_TEST_CXX11)
     set(CMAKE_CXX_STANDARD 11)
     set(CMAKE_CXX_EXTENSIONS OFF)

Eigen/src/Core/util/Meta.h

@@ -170,10 +170,8 @@ template<> struct is_integral<signed int>             { enum { value = true }; }
 template<> struct is_integral<unsigned int>           { enum { value = true }; };
 template<> struct is_integral<signed long>            { enum { value = true }; };
 template<> struct is_integral<unsigned long>          { enum { value = true }; };
-#if EIGEN_COMP_MSVC
+template<> struct is_integral<signed long long>       { enum { value = true }; };
-template<> struct is_integral<signed __int64>         { enum { value = true }; };
+template<> struct is_integral<unsigned long long>     { enum { value = true }; };
-template<> struct is_integral<unsigned __int64>       { enum { value = true }; };
-#endif
 #endif
 
 #if EIGEN_HAS_CXX11

ci/build.linux.gitlab-ci.yml

@@ -48,6 +48,11 @@ build:linux:cross:x86-64:gcc-10:default:
     EIGEN_CI_CROSS_C_COMPILER: x86_64-linux-gnu-gcc-10
     EIGEN_CI_CROSS_CXX_COMPILER: x86_64-linux-gnu-g++-10
 
+build:linux:cross:x86-64:gcc-10:cxx03:
+  extends: build:linux:cross:x86-64:gcc-10:default
+  variables:
+    EIGEN_CI_ADDITIONAL_ARGS: "-DEIGEN_TEST_CXX11=off"
+
 build:linux:cross:x86-64:gcc-10:avx:
   extends: build:linux:cross:x86-64:gcc-10:default
   variables:

ci/build.windows.gitlab-ci.yml

@@ -16,6 +16,7 @@
   rules:
     - if: $CI_PIPELINE_SOURCE == "schedule" && $CI_PROJECT_NAMESPACE == "libeigen"
     - if: $CI_PIPELINE_SOURCE == "web" && $CI_PROJECT_NAMESPACE == "libeigen"
+    - if: $CI_PIPELINE_SOURCE == "push" && $CI_PROJECT_NAMESPACE == "libeigen"
   cache:
     key: "$CI_JOB_NAME-$CI_COMMIT_REF_SLUG-BUILD"
     paths:
@@ -37,6 +38,11 @@ build:windows:x86-64:msvc-14.29:default:
   variables:
     EIGEN_CI_MSVC_VER: "14.29"
 
+build:windows:x86-64:msvc-14.29:cxx03:
+  extends: build:windows:x86-64:msvc-14.29:default
+  variables:
+    EIGEN_CI_ADDITIONAL_ARGS: "-DEIGEN_TEST_CXX11=off"
+
 build:windows:x86-64:msvc-14.29:avx2:
   extends: build:windows:x86-64:msvc-14.29:default
   variables:

ci/test.linux.gitlab-ci.yml

@@ -46,6 +46,10 @@ test:linux:x86-64:gcc-6:default:unsupported:
   variables:
     EIGEN_CI_INSTALL: g++-10
 
+test:linux:x86-64:gcc-10:cxx03:
+  extends: .test:linux:x86-64:gcc-10:default
+  needs: [ build:linux:cross:x86-64:gcc-10:cxx03 ]
+
 test:linux:x86-64:gcc-10:default:official:
   extends: .test:linux:x86-64:gcc-10:default
   variables:

ci/test.windows.gitlab-ci.yml

@@ -6,8 +6,9 @@
   after_script:
     - ./ci/scripts/test.windows.after_script.ps1
   rules:
-    - if: $CI_PIPELINE_SOURCE == "schedule"
+    - if: $CI_PIPELINE_SOURCE == "schedule" && $CI_PROJECT_NAMESPACE == "libeigen"
-    - if: $CI_PIPELINE_SOURCE == "web"
+    - if: $CI_PIPELINE_SOURCE == "web" && $CI_PROJECT_NAMESPACE == "libeigen"
+    - if: $CI_PIPELINE_SOURCE == "push" && $CI_PROJECT_NAMESPACE == "libeigen"
   tags: 
     - eigen-runner
     - windows
@@ -35,6 +36,10 @@ test:windows:x86-64:msvc-14.16:default:unsupported:
   extends: .test:windows
   needs: [ build:windows:x86-64:msvc-14.29:default ]
 
+test:windows:x86-64:msvc-14.29:default:official:
+  extends: .test:windows:x86-64:msvc-14.29:default
+  needs: [ build:windows:x86-64:msvc-14.29:cxx03 ]
+
 test:windows:x86-64:msvc-14.29:default:official:
   extends: .test:windows:x86-64:msvc-14.29:default
   variables:

doc/special_examples/CMakeLists.txt

@@ -21,7 +21,7 @@ endif()
 
 if(EIGEN_COMPILER_SUPPORT_CPP11)
   add_executable(random_cpp11 random_cpp11.cpp)
-  target_link_libraries(random_cpp11 ${EIGEN_STANDARD_LIBRARIES_TO_LINK_TO})
+  target_link_libraries(random_cpp11 ${EIGEN_STANDARD_LIBRARIES_TO_LINK_TO} Eigen3::Eigen)
   add_dependencies(all_examples random_cpp11)
   target_compile_options(random_cpp11 PRIVATE "-std=c++11")