qt-windows is using different path-settings as qt-linux

library/library.pro

@@ -2,11 +2,12 @@ TEMPLATE = lib
 TARGET = mobility_calc
 # CONFIG += staticlib
 
-QMAKE_CXXFLAGS += -std=c++11 -g -O0
+QMAKE_CXXFLAGS += -std=c++17 -g -O0
 
 INCLUDEPATH += $$_PRO_FILE_PWD_/include
-INCLUDEPATH += $$_PRO_FILE_PWD_/include/rapidjson
 INCLUDEPATH += $$_PRO_FILE_PWD_/include/mobilisis
+INCLUDEPATH += $$_PRO_FILE_PWD_/include/rapidjson
+
 
 SOURCES += \
     src/calculator_functions.cpp \

main/main.cpp

@@ -1,4 +1,29 @@
-#include "calculate_price.h"
+#include <calculate_price.h>
+
+
+#ifdef WIN32
+#include <time.h>
+#include <iomanip>
+#include <sstream>
+
+extern "C" char* strptime(const char* s,
+                          const char* f,
+                          struct tm* tm) {
+    // Isn't the C++ standard lib nice? std::get_time is defined such that its
+    // format parameters are the exact same as strptime. Of course, we have to
+    // create a string stream first, and imbue it with the current C locale, and
+    // we also have to make sure we return the right things if it fails, or
+    // if it succeeds, but this is still far simpler an implementation than any
+    // of the versions in any of the C standard libraries.
+    std::istringstream input(s);
+    input.imbue(std::locale(setlocale(LC_ALL, nullptr)));
+    input >> std::get_time(tm, f);
+    if (input.fail()) {
+        return nullptr;
+    }
+    return (char*)(s + input.tellg());
+}
+#endif
 
 #include <QDebug>
 #include <QDateTime>

main/main.pro

@@ -6,9 +6,22 @@ CONFIG += -std=c++11
 QMAKE_CFLAGS = -c -pipe -std=c11 -g -O0 -Wall -Wno-attributes -W -DDEBUG -D_REENTRANT -fPIC
 QMAKE_CXX_FLAGS += -std=c11
 
-INCLUDEPATH += $$_PRO_FILE_PWD_/../../MOBILISIS_Calculator/library/include/mobilisis/
+INCLUDEPATH += $$_PRO_FILE_PWD_/../../MOBILISIS-Calculator/library/include/mobilisis/
 INCLUDEPATH += .
-LIBS += -L$$OUT_PWD/../library/ -lmobility_calc
+
+unix {
+    LIBS += -L$$OUT_PWD/../library/ -lmobility_calc
+}
+
+CONFIG(debug, debug|release) {
+    win32 {
+        LIBS += -L$$OUT_PWD/../library/debug/ -lmobility_calc
+    }
+} else {
+    win32 {
+        LIBS += -L$$OUT_PWD/../library/release/ -lmobility_calc
+    }
+}
 
 SOURCES += main.cpp