[abseil:x64-windows] DLL Linker Error

[abcping123]

Environment

• OS: [Windows 10 v1903]
• Compiler: Visual Studio 2017

It is fine to build abseil dll, but when I use it in my project, some annoying linker errors ocurr.
And I find this in absl/base/config.h

// ABSL_DLL
//
// When building Abseil as a DLL, this macro expands to __declspec(dllexport)
// so we can annotate symbols appropriately as being exported. When used in
// headers consuming a DLL, this macro expands to __declspec(dllimport) so
// that consumers know the symbol is defined inside the DLL. In all other cases,
// the macro expands to nothing.
#if defined(_MSC_VER)
#if defined(ABSL_BUILD_DLL)
#define ABSL_DLL __declspec(dllexport)
#elif defined(ABSL_CONSUME_DLL)
#define ABSL_DLL __declspec(dllimport)
#else
#define ABSL_DLL
#endif
#else
#define ABSL_DLL
#endif // defined(_MSC_VER)

I put ABSL_CONSUME_DLL into preprocessor definitions, and it works.

I don't know whether it is bug, or work should be done by library users.

[JackBoosY]

@abcping123 That's indeed a bug, thanks for reporting this!

[abcping123]

@JackBoosY It is really quick response, thanks!