Compilation error on master using MinGW 8.2.0 and MSYS

[Kravlalala]

I've configured project with the following command:
cmake.exe -G "MSYS Makefiles" -B build .
And then make gives me the following result:

$ make.exe 
Scanning dependencies of target gtest
[ 12%] Building CXX object googletest/CMakeFiles/gtest.dir/src/gtest-all.cc.obj
In file included from C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-internal.h:40,
                 from C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/gtest.h:62,
                 from c:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-all.cc:38:
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h: In function 'int testing::internal::posix::StrCaseCmp(const char*, const char*)':
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h:1959:10: error: '_stricmp' was not declared in this scope
   return _stricmp(s1, s2);
          ^~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h:1959:10: note: suggested alternative: 'strncmp'      
   return _stricmp(s1, s2);
          ^~~~~~~~
          strncmp
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h: In function 'char* testing::internal::posix::StrDup(const char*)':
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h:1961:47: error: '_strdup' was not declared in this scope
 inline char* StrDup(const char* src) { return _strdup(src); }
                                               ^~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h:1961:47: note: suggested alternative: 'StrDup'       
 inline char* StrDup(const char* src) { return _strdup(src); }
                                               ^~~~~~~
                                               StrDup
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h: In function 'int testing::internal::posix::FileNo(FILE*)':
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h:1969:40: error: '_fileno' was not declared in this scope
 inline int FileNo(FILE* file) { return _fileno(file); }
                                        ^~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h:1969:40: note: suggested alternative: 'file'
 inline int FileNo(FILE* file) { return _fileno(file); }
                                        ^~~~~~~
                                        file
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h: In function 'FILE* testing::internal::posix::FDOpen(int, const char*)':
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h:2027:56: error: 'fdopen' was not declared in this scope
 inline FILE* FDOpen(int fd, const char* mode) { return fdopen(fd, mode); }
                                                        ^~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/include/gtest/internal/gtest-port.h:2027:56: note: suggested alternative: 'fopen'        
 inline FILE* FDOpen(int fd, const char* mode) { return fdopen(fd, mode); }
                                                        ^~~~~~
                                                        fopen
In file included from c:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-all.cc:41:
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest.cc: In static member function 'static bool testing::internal::String::CaseInsensitiveWideCStringEquals(const wchar_t*, const wchar_t*)':
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest.cc:1942:10: error: '_wcsicmp' was not declared in this scope
   return _wcsicmp(lhs, rhs) == 0;
          ^~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest.cc:1942:10: note: suggested alternative: 'wcsncmp'
   return _wcsicmp(lhs, rhs) == 0;
          ^~~~~~~~
          wcsncmp
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest.cc: In member function 'int testing::UnitTest::Run()':
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest.cc:4921:21: error: '_OUT_TO_STDERR' was not declared in this scope
     _set_error_mode(_OUT_TO_STDERR);
                     ^~~~~~~~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest.cc:4921:5: error: '_set_error_mode' was not declared in this scope
     _set_error_mode(_OUT_TO_STDERR);
     ^~~~~~~~~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest.cc:4921:5: note: suggested alternative: 'SetErrorMode'
     _set_error_mode(_OUT_TO_STDERR);
     ^~~~~~~~~~~~~~~
     SetErrorMode
In file included from c:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-all.cc:42:
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc: In function 'void testing::internal::DeathTestAbort(const string&)':
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc:296:5: error: '_exit' was not declared in this scope
     _exit(1);
     ^~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc:296:5: note: suggested alternative: '_Exit'
     _exit(1);
     ^~~~~
     _Exit
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc: In member function 'virtual void testing::internal::DeathTestImpl::Abort(testing::internal::DeathTest::AbortReason)':
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc:527:3: error: '_exit' was not declared in this scope
   _exit(1);  // Exits w/o any normal exit hooks (we were supposed to crash)
   ^~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc:527:3: note: suggested alternative: '_Exit'
   _exit(1);  // Exits w/o any normal exit hooks (we were supposed to crash)
   ^~~~~
   _Exit
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc: In member function 'virtual testing::internal::DeathTest::TestRole testing::internal::WindowsDeathTest::AssumeRole()':
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc:771:24: error: '_MAX_PATH' was not declared in this scope        
   char executable_path[_MAX_PATH + 1];  // NOLINT
                        ^~~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc:771:24: note: suggested alternative: 'MAX_PATH'
   char executable_path[_MAX_PATH + 1];  // NOLINT
                        ^~~~~~~~~
                        MAX_PATH
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc:773:65: error: 'executable_path' was not declared in this scope  
                                                                 executable_path,
                                                                 ^~~~~~~~~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc:308:38: note: in definition of macro 'GTEST_DEATH_TEST_CHECK_'   
     if (!::testing::internal::IsTrue(expression)) { \
                                      ^~~~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc:797:11: error: 'executable_path' was not declared in this scope  
           executable_path, const_cast<char*>(command_line.c_str()),
           ^~~~~~~~~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-death-test.cc:308:38: note: in definition of macro 'GTEST_DEATH_TEST_CHECK_'   
     if (!::testing::internal::IsTrue(expression)) { \
                                      ^~~~~~~~~~
In file included from c:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-all.cc:43:
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-filepath.cc: In static member function 'static testing::internal::FilePath testing::internal::FilePath::GetCurrentDir()':
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-filepath.cc:49:26: error: '_MAX_PATH' was not declared in this scope
 # define GTEST_PATH_MAX_ _MAX_PATH
                          ^~~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-filepath.cc:101:12: note: in expansion of macro 'GTEST_PATH_MAX_'
   char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
            ^~~~~~~~~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-filepath.cc:49:26: note: suggested alternative: 'MAX_PATH'
 # define GTEST_PATH_MAX_ _MAX_PATH
                          ^~~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-filepath.cc:101:12: note: in expansion of macro 'GTEST_PATH_MAX_'
   char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
            ^~~~~~~~~~~~~~~
C:/Users/ikravchu/Documents/Templates/Tests/googletest/googletest/src/gtest-filepath.cc:102:27: error: 'cwd' was not declared in this scope
   return FilePath(_getcwd(cwd, sizeof(cwd)) == nullptr ? "" : cwd);
                           ^~~
make[2]: *** [googletest/CMakeFiles/gtest.dir/src/gtest-all.cc.obj] Error 1
make[1]: *** [googletest/CMakeFiles/gtest.dir/all] Error 2
make: *** [all] Error 2

I can bypass it by activation gcc extensions in the top level gtest CMakeLists.txt like this:
if(NOT CYGWIN) set(CMAKE_CXX_EXTENSIONS ON) message("Extensions: ${CMAKE_CXX_EXTENSIONS}") endif()

[piotrgrabowski2501]

Could you show your CMakeLists.txt, please? I add above extensions, but I still have the same errors like you.

[Ogiwara-CostlierRain464]

Using MinGW64 instead of MinGW32 resolved the problem, in my case.