How can I solve this error ?

[Yash001]

Hello,

I am using Ubuntu OS 18.04.3 and Qt 5.13.1.

Here compiler output:

In file included from /opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:105:0,
                 from /opt/Qt/5.13.1/gcc_64/include/QtCore/qalgorithms.h:43,
                 from /opt/Qt/5.13.1/gcc_64/include/QtCore/qdebug.h:44,
                 from LowPassFilter.h:3,
                 from LowPassFilter.cpp:1:
/opt/Qt/5.13.1/gcc_64/include/QtCore/qcompilerdetection.h:223:41: error: expected constructor, destructor, or type conversion before ‘(’ token
 #    define Q_DECL_IMPORT     __declspec(dllimport)
                                         ^
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:360:27: note: in expansion of macro ‘Q_DECL_IMPORT’
 #    define Q_CORE_EXPORT Q_DECL_IMPORT
                           ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:414:1: note: in expansion of macro ‘Q_CORE_EXPORT’
 Q_CORE_EXPORT Q_DECL_CONST_FUNCTION const char *qVersion(void) Q_DECL_NOTHROW;
 ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qcompilerdetection.h:223:41: error: expected constructor, destructor, or type conversion before ‘(’ token
 #    define Q_DECL_IMPORT     __declspec(dllimport)
                                         ^
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:360:27: note: in expansion of macro ‘Q_DECL_IMPORT’
 #    define Q_CORE_EXPORT Q_DECL_IMPORT
                           ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:733:33: note: in expansion of macro ‘Q_CORE_EXPORT’
 Q_NORETURN Q_DECL_COLD_FUNCTION Q_CORE_EXPORT void qTerminate() Q_DECL_NOTHROW;
                                 ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qcompilerdetection.h:223:41: error: expected constructor, destructor, or type conversion before ‘(’ token
 #    define Q_DECL_IMPORT     __declspec(dllimport)
                                         ^
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:360:27: note: in expansion of macro ‘Q_DECL_IMPORT’
 #    define Q_CORE_EXPORT Q_DECL_IMPORT
                           ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:741:1: note: in expansion of macro ‘Q_CORE_EXPORT’
 Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool qSharedBuild() Q_DECL_NOTHROW;
 ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qcompilerdetection.h:223:41: error: expected constructor, destructor, or type conversion before ‘(’ token
 #    define Q_DECL_IMPORT     __declspec(dllimport)
                                         ^
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:360:27: note: in expansion of macro ‘Q_DECL_IMPORT’
 #    define Q_CORE_EXPORT Q_DECL_IMPORT
                           ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:778:1: note: in expansion of macro ‘Q_CORE_EXPORT’
 Q_CORE_EXPORT QString qt_error_string(int errorCode = -1);
 ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qcompilerdetection.h:223:41: error: expected constructor, destructor, or type conversion before ‘(’ token
 #    define Q_DECL_IMPORT     __declspec(dllimport)
                                         ^
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:360:27: note: in expansion of macro ‘Q_DECL_IMPORT’
 #    define Q_CORE_EXPORT Q_DECL_IMPORT
                           ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:784:1: note: in expansion of macro ‘Q_CORE_EXPORT’
 Q_CORE_EXPORT void qt_assert(const char *assertion, const char *file, int line) Q_DECL_NOTHROW;
 ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qcompilerdetection.h:223:41: error: expected constructor, destructor, or type conversion before ‘(’ token
 #    define Q_DECL_IMPORT     __declspec(dllimport)
                                         ^
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:360:27: note: in expansion of macro ‘Q_DECL_IMPORT’
 #    define Q_CORE_EXPORT Q_DECL_IMPORT
                           ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:802:1: note: in expansion of macro ‘Q_CORE_EXPORT’
 Q_CORE_EXPORT void qt_assert_x(const char *where, const char *what, const char *file, int line) Q_DECL_NOTHROW;
 ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qcompilerdetection.h:223:41: error: expected constructor, destructor, or type conversion before ‘(’ token
 #    define Q_DECL_IMPORT     __declspec(dllimport)
                                         ^
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:360:27: note: in expansion of macro ‘Q_DECL_IMPORT’
 #    define Q_CORE_EXPORT Q_DECL_IMPORT
                           ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:812:12: note: in expansion of macro ‘Q_CORE_EXPORT’
 Q_NORETURN Q_CORE_EXPORT void qt_check_pointer(const char *, int) Q_DECL_NOTHROW;
            ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qcompilerdetection.h:223:41: error: expected constructor, destructor, or type conversion before ‘(’ token
 #    define Q_DECL_IMPORT     __declspec(dllimport)
                                         ^
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:360:27: note: in expansion of macro ‘Q_DECL_IMPORT’
 #    define Q_CORE_EXPORT Q_DECL_IMPORT
                           ^~~~~~~~~~~~~
/opt/Qt/5.13.1/gcc_64/include/QtCore/qglobal.h:814:1: note: in expansion of macro ‘Q_CORE_EXPORT’
 Q_CORE_EXPORT void qBadAlloc();
 ^~~~~~~~~~~~~

any suggestion how can I solve this error?
any module do i need to Install in Linux?

[JonB]

@Yash001 said in How can I solve this error ?:
__declspec(dllimport) is used when compiling under Windows, and for MSVC only I think. So somehow I think that is what your compilation has been configured for?

[Yash001]

@JonB Thank you sir, you right.

I did mistake in .pro file. I mention DEFINE like below.
DEFINES += WIN64 SQUIDSTATELIBRARY_LIB. To solve this error replace I replace to DEFINES += SQUIDSTATELIBRARY_LIB and it is work.

I don't know some how it is work on mac, but on Linux it was giving me error.

Thank you.