commit e1cc005f4c5a14069ac7492fbe107e44cdff30c8
author Florin Crișan <florin.crisan@gmail.com> Fri May 28 11:06:59 2021 +0300
committer Florin Crișan <florin.crisan@gmail.com> Thu Jun 03 09:12:53 2021 +0300
tree c2ea9e685f99c136104f6f168e416337ef48371f
parent 53495a2a7d6ba7e0691a7f3602e9a5324bba6e45

#3420 Properly declare all overloads of testing::internal::PrintTo as DLL exports

This was causing the following linker error on Microsoft Visual C++ when compiling as a DLL:

```
googletest-printers-test.cc.obj : error LNK2019: unresolved external symbol "void __cdecl testing::internal::PrintTo(char16_t const *,class std::basic_ostream<char,struct std::char_traits<char> > *)" (?PrintTo@internal@testing@@YAXPEB_SPEAV?$basic_ostream@DU?$char_traits@D@std@@@std@@@Z) referenced in function "public: static void __cdecl testing::internal::UniversalPrinter<char16_t const *>::Print(char16_t const * const &,class std::basic_ostream<char,struct std::char_traits<char> > *)" (?Print@?$UniversalPrinter@PEB_S@internal@testing@@SAXAEBQEB_SPEAV?$basic_ostream@DU?$char_traits@D@std@@@std@@@Z)
googletest-printers-test.cc.obj : error LNK2019: unresolved external symbol "void __cdecl testing::internal::PrintTo(char32_t const *,class std::basic_ostream<char,struct std::char_traits<char> > *)" (?PrintTo@internal@testing@@YAXPEB_UPEAV?$basic_ostream@DU?$char_traits@D@std@@@std@@@Z) referenced in function "public: static void __cdecl testing::internal::UniversalPrinter<char32_t const *>::Print(char32_t const * const &,class std::basic_ostream<char,struct std::char_traits<char> > *)" (?Print@?$UniversalPrinter@PEB_U@internal@testing@@SAXAEBQEB_UPEAV?$basic_ostream@DU?$char_traits@D@std@@@std@@@Z)
```

googletest/include/gtest/gtest-printers.h

diff --git a/googletest/include/gtest/gtest-printers.h b/googletest/include/gtest/gtest-printers.h
index 978420e..076c9de 100644
--- a/googletest/include/gtest/gtest-printers.h
+++ b/googletest/include/gtest/gtest-printers.h
@@ -501,18 +501,18 @@
 }
 #ifdef __cpp_char8_t
 // Overloads for u8 strings.
-void PrintTo(const char8_t* s, ::std::ostream* os);
+GTEST_API_ void PrintTo(const char8_t* s, ::std::ostream* os);
 inline void PrintTo(char8_t* s, ::std::ostream* os) {
   PrintTo(ImplicitCast_<const char8_t*>(s), os);
 }
 #endif
 // Overloads for u16 strings.
-void PrintTo(const char16_t* s, ::std::ostream* os);
+GTEST_API_ void PrintTo(const char16_t* s, ::std::ostream* os);
 inline void PrintTo(char16_t* s, ::std::ostream* os) {
   PrintTo(ImplicitCast_<const char16_t*>(s), os);
 }
 // Overloads for u32 strings.
-void PrintTo(const char32_t* s, ::std::ostream* os);
+GTEST_API_ void PrintTo(const char32_t* s, ::std::ostream* os);
 inline void PrintTo(char32_t* s, ::std::ostream* os) {
   PrintTo(ImplicitCast_<const char32_t*>(s), os);
 }