target.h

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#pragma once
 
// Detect usage of the GCC GNU compiler.
#if defined(__GNUC__)
  #define IS_GNU 1
// #pragma GCC visibility
#else
  #define IS_GNU 0
#endif
 
// Check when the MSVC compiler is active for a Windows target.
#if defined(_MSC_VER)
  #define IS_MSVC 1
#else
  #define IS_MSVC 0
#endif
 
// Check when a compiler is active for a Windows target.
#if defined(WIN32)
  #define IS_WIN 1
#else
  #define IS_WIN 0
#endif
 
// Determine if the build target a dynamically shared library.
#if defined(TARGET_DYNAMIC_LIB)
  #define IS_DL_TARGET 1
#else
  #define IS_DL_TARGET 0
#endif
 
// Determine if the build target a dynamically shared library.
#if defined(TARGET_STATIC_LIB)
  #define IS_SL_TARGET 1
#else
  #define IS_SL_TARGET 0
#endif
 
// CHeck if an application binary is targeted
#if IS_DL_TARGET || IS_SL_TARGET
  #define IS_AB_TARGET 0
#else
  #define IS_AB_TARGET 1
#endif
 
// Determine if QT is used in the target.
#if defined(TARGET_QT) || defined(QT_VERSION)
  #define IS_QT 1
#else
  #define IS_QT 0
#endif
 
#if IS_WIN
  #if IS_GNU
    #define TARGET_EXPORT __attribute__((dllexport))
    #define TARGET_IMPORT __attribute__((dllimport))
    #define TARGET_HIDDEN __attribute__((visibility("hidden")))
  #elif IS_MSVC
    #define TARGET_EXPORT __declspec(dllexport)
    #define TARGET_IMPORT __declspec(dllimport)
    #define TARGET_HIDDEN
  #else
    #error "Failed to detect compiler."
  #endif
#else
  #define TARGET_EXPORT __attribute__((visibility("default")))
  #define TARGET_IMPORT
  #define TARGET_HIDDEN __attribute__((visibility("hidden")))
#endif
 
// MinGW GCC < 13.4 detection for thread_local destructor ordering bug GCC #116159"
#if (defined(__MINGW32__) || defined(__MINGW64__)) && ((__GNUC__ < 13) || (__GNUC__ == 13 && __GNUC_MINOR__ < 4))
  #define IS_MINGW_THREADLOCAL_BUGGY 1
#else
  #define IS_MINGW_THREADLOCAL_BUGGY 0
#endif
 
// Report current targeted result.
#if defined(REPORT_TARGET)
  // Report when GNU GCC is used.
  #if IS_GNU
    #pragma message("GNU compiler")
  #endif
  // Report the Windows target.
  #if IS_WIN
    #pragma message("Windows build")
  #endif
  // Report the GNU C++ compiler.
  #if IS_GNU
    #pragma message("GNU C++ Compiler")
  #endif
  // Report the Visual C++ compiler.
  #if IS_MSVC
    #pragma message("Visual C++ Compiler")
  #endif
  // Report the QT is linked.
  #if IS_QT
    #pragma message("Target: QT")
  #endif
  // Report the QT designer widgets are exported.
  #ifdef QDESIGNER_EXPORT_WIDGETS
    #pragma message("Target: QT Export designer widgets")
  #endif
  // Report the target is a dynamic library.
  #if IS_DL_TARGET
    #pragma message("Target: Shared Library")
  #endif
  // Report the target is a static library (archive).
  #if IS_SL_TARGET
    #pragma message("Target: Static Library")
  #endif
  // Report the C++ version using preprocessor directives
  #define _STRINGIFY_(x) #x
  #define _TOSTRING_(x) _STRINGIFY_(x)
  #pragma message("C++: " _TOSTRING_(__cplusplus))
  #undef _STRINGIFY_
  #undef _TOSTRING_
  // Report the thread local bug.
  #if IS_MINGW_THREADLOCAL_BUGGY
    #pragma message("MinGW GCC < 13.4 detected: thread_local destructor ordering bug present (GCC #116159)")
  #endif
#endif// REPORT_TARGET