I'm trying to use the NVIDIA's nvapi, and I have compilation errors I don't fully understand. Perhaps I am using the wrong compiler?
#include "nvapi.h"
#include <iostream>
int main()
{
printf("Hello nvapi!");
return 0;
}
Compilation:
g++ nvapi_hello.cpp
Output (truncated because it was too long):
In file included from nvapi_lite_d3dext.h:35:0,
from nvapi.h:6,
from nvapi_hello.cpp:1:
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:134:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Unload();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:134:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Unload();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:134:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Unload();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:153:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GetErrorMessage(NvAPI_Status nr,NvAPI_ShortString szDesc);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:153:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GetErrorMessage(NvAPI_Status nr,NvAPI_ShortString szDesc);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:153:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GetErrorMessage(NvAPI_Status nr,NvAPI_ShortString szDesc);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:174:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GetInterfaceVersionString(NvAPI_ShortString szDesc);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:174:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GetInterfaceVersionString(NvAPI_ShortString szDesc);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:174:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GetInterfaceVersionString(NvAPI_ShortString szDesc);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:319:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GPU_GetEDID(NvPhysicalGpuHandle hPhysicalGpu, NvU32 displayOutputId, NV_EDID *pEDID);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:319:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GPU_GetEDID(NvPhysicalGpuHandle hPhysicalGpu, NvU32 displayOutputId, NV_EDID *pEDID);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:319:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GPU_GetEDID(NvPhysicalGpuHandle hPhysicalGpu, NvU32 displayOutputId, NV_EDID *pEDID);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:669:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_SetView(NvDisplayHandle hNvDisplay, NV_VIEW_TARGET_INFO *pTargetInfo, NV_TARGET_VIEW_MODE targetView);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:669:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_SetView(NvDisplayHandle hNvDisplay, NV_VIEW_TARGET_INFO *pTargetInfo, NV_TARGET_VIEW_MODE targetView);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:669:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_SetView(NvDisplayHandle hNvDisplay, NV_VIEW_TARGET_INFO *pTargetInfo, NV_TARGET_VIEW_MODE targetView);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:808:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_SetViewEx(NvDisplayHandle hNvDisplay, NV_DISPLAY_PATH_INFO *pPathInfo, NV_TARGET_VIEW_MODE displayView);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:808:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_SetViewEx(NvDisplayHandle hNvDisplay, NV_DISPLAY_PATH_INFO *pPathInfo, NV_TARGET_VIEW_MODE displayView);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:808:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_SetViewEx(NvDisplayHandle hNvDisplay, NV_DISPLAY_PATH_INFO *pPathInfo, NV_TARGET_VIEW_MODE displayView);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1030:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GetDisplayDriverVersion(NvDisplayHandle hNvDisplay, NV_DISPLAY_DRIVER_VERSION *pVersion);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1030:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GetDisplayDriverVersion(NvDisplayHandle hNvDisplay, NV_DISPLAY_DRIVER_VERSION *pVersion);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1030:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GetDisplayDriverVersion(NvDisplayHandle hNvDisplay, NV_DISPLAY_DRIVER_VERSION *pVersion);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1159:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeSet(NvU32 expertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1159:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeSet(NvU32 expertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1159:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeSet(NvU32 expertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1167:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeGet(NvU32 *pExpertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1167:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeGet(NvU32 *pExpertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1167:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeGet(NvU32 *pExpertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1209:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeDefaultsSet(NvU32 expertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1209:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeDefaultsSet(NvU32 expertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1209:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeDefaultsSet(NvU32 expertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1216:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeDefaultsGet(NvU32 *pExpertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1216:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeDefaultsGet(NvU32 *pExpertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1216:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_OGL_ExpertModeDefaultsGet(NvU32 *pExpertDetailLevel,
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1251:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_EnumTCCPhysicalGPUs( NvPhysicalGpuHandle nvGPUHandle[NVAPI_MAX_PHYSICAL_GPUS], NvU32 *pGpuCount);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1251:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_EnumTCCPhysicalGPUs( NvPhysicalGpuHandle nvGPUHandle[NVAPI_MAX_PHYSICAL_GPUS], NvU32 *pGpuCount);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1251:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_EnumTCCPhysicalGPUs( NvPhysicalGpuHandle nvGPUHandle[NVAPI_MAX_PHYSICAL_GPUS], NvU32 *pGpuCount);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1282:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_EnumLogicalGPUs(NvLogicalGpuHandle nvGPUHandle[NVAPI_MAX_LOGICAL_GPUS], NvU32 *pGpuCount);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1282:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_EnumLogicalGPUs(NvLogicalGpuHandle nvGPUHandle[NVAPI_MAX_LOGICAL_GPUS], NvU32 *pGpuCount);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:99:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_Initialize();
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:42: error: expected primary-expression before 'return'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1282:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_EnumLogicalGPUs(NvLogicalGpuHandle nvGPUHandle[NVAPI_MAX_LOGICAL_GPUS], NvU32 *pGpuCount);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: warning: '__success' initialized and declared 'extern'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1308:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GetPhysicalGPUsFromDisplay(NvDisplayHandle hNvDisp, NvPhysicalGpuHandle nvGPUHandle[NVAPI_MAX_PHYSICAL_GPUS], NvU32 *pGpuCount);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:41: error: redefinition of 'int __success'
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
nvapi.h:1308:1: note: in expansion of macro 'NVAPI_INTERFACE'
NVAPI_INTERFACE NvAPI_GetPhysicalGPUsFromDisplay(NvDisplayHandle hNvDisp, NvPhysicalGpuHandle nvGPUHandle[NVAPI_MAX_PHYSICAL_GPUS], NvU32 *pGpuCount);
^~~~~~~~~~~~~~~
nvapi_lite_salstart.h:821:32: note: 'int __success' previously defined here
#define NVAPI_INTERFACE extern __success(return == NVAPI_OK) NvAPI_Status __cdecl
^
...
I installed mingw-w64 and I'm using g++ version:
g++ (x86_64-posix-sjlj-rev2, Built by MinGW-W64 project) 6.3.0
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
I've downloaded NVIDIA's NVAPI SDK from https://developer.nvidia.com/gameworksdownload#?search=nvapi
I found an answer here that explains these variables are created with #define in the file nvapi_lite_salstart.h and then undefined using #undef in the file nvapi_lite_salend.h which is called at the start and end respectively in each of the header files, as listed here at the start of nvapi.h:
#include"nvapi_lite_salstart.h" //Remove this line
#include"nvapi_lite_common.h"
#include"nvapi_lite_sli.h"
#include"nvapi_lite_surround.h"
#include"nvapi_lite_stereo.h"
#include"nvapi_lite_d3dext.h"
#include"nvapi_lite_salstart.h" //Add this line to fix the errors
As you can see, it appears the "salstart" file just needs to be moved to the end of the list because for some reason it's incorrectly at the top. Not sure why this works properly in Visual Studio (it does without making the above modifications), but this at least it fixed those errors in MinGW; however, the precompiled library file provided by nVidia (either nvapi.lib or nvapi64.lib) is NOT compatible with MinGW, so you're forced to use MS Visual Studio.