target.h

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/*
Making it easier to build libraries for the various targets and platforms.
Defines these with true (1) or false (0):
 * IS_GCC > GNU compiler detected.
 * IS_QT > QT compile target is detected.
 * IS_WIN > Windows compile target is detected.
 
 * IS_AB_TARGET > An application binary is the current target.
 * IS_DL_TARGET > A dynamic library is the current target.
 * IS_SL_TARGET > A static library is the current target.
*/
 
#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
 
// 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 target is a dynamic shared 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
#endif// REPORT_TARGET