Use target_compile_features to specify C++ standard requirement

test/CMakeLists.txt

@@ -109,7 +109,7 @@ if (FMT_MODULE)
   # If module support is present the module tests require a
   # test-only module to be built from {fmt}
   add_library(test-module OBJECT ${CMAKE_SOURCE_DIR}/src/fmt.cc)
-  target_compile_features(test-module PUBLIC ${FMT_REQUIRED_FEATURES})
+  target_compile_features(test-module PUBLIC cxx_std_11)
   target_include_directories(test-module PUBLIC
     $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>)
   enable_module(test-module)

test/add-subdirectory-test/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1...3.18)
+cmake_minimum_required(VERSION 3.8...3.18)
 
 project(fmt-test CXX)
 

test/compile-error-test/CMakeLists.txt

@@ -1,6 +1,6 @@
 # Test if compile errors are produced where necessary.
 
-cmake_minimum_required(VERSION 3.1...3.18)
+cmake_minimum_required(VERSION 3.8...3.18)
 project(compile-error-test CXX)
 
 set(fmt_headers "
@@ -64,7 +64,7 @@ function (run_tests)
   ")
 
   file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/CMakeLists.txt" "
-    cmake_minimum_required(VERSION 3.1...3.18)
+    cmake_minimum_required(VERSION 3.8...3.18)
     project(tests CXX)
     add_subdirectory(${FMT_DIR} fmt)
     ${cmake_targets}

test/find-package-test/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1...3.18)
+cmake_minimum_required(VERSION 3.8...3.18)
 
 project(fmt-test)
 

test/fuzzing/CMakeLists.txt

@@ -22,7 +22,7 @@ function(add_fuzzer source)
   if (FMT_FUZZ_LDFLAGS)
     target_link_libraries(${name} PRIVATE ${FMT_FUZZ_LDFLAGS})
   endif ()
-  target_compile_features(${name} PRIVATE cxx_generic_lambdas)
+  target_compile_features(${name} PRIVATE cxx_std_14)
 endfunction()
 
 foreach (source chrono-duration.cc chrono-timepoint.cc float.cc named-arg.cc one-arg.cc two-args.cc)

test/gtest/CMakeLists.txt

@@ -9,6 +9,7 @@ add_library(gtest STATIC
   gmock-gtest-all.cc gmock/gmock.h gtest/gtest.h gtest/gtest-spi.h)
 target_compile_definitions(gtest PUBLIC GTEST_HAS_STD_WSTRING=1)
 target_include_directories(gtest SYSTEM PUBLIC .)
+target_compile_features(gtest PUBLIC cxx_std_11)
 
 find_package(Threads)
 if (Threads_FOUND)
@@ -17,9 +18,10 @@ else ()
   target_compile_definitions(gtest PUBLIC GTEST_HAS_PTHREAD=0)
 endif ()
 
-# Workaround GTest bug https://github.com/google/googletest/issues/705.
-fmt_check_cxx_compiler_flag(
-  -fno-delete-null-pointer-checks HAVE_FNO_DELETE_NULL_POINTER_CHECKS)
+# Workaround GTest bug https://github.com/google/googletest/issues/705
+if (NOT MSVC)
+  check_cxx_compiler_flag(-fno-delete-null-pointer-checks HAVE_FNO_DELETE_NULL_POINTER_CHECKS)
+endif ()
 if (HAVE_FNO_DELETE_NULL_POINTER_CHECKS)
   target_compile_options(gtest PUBLIC -fno-delete-null-pointer-checks)
 endif ()

test/static-export-test/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1...3.18)
+cmake_minimum_required(VERSION 3.8...3.18)
 
 project(fmt-link CXX)