A DESCRIPTION OF THE PROBLEM :
The definition of getAlwaysOnTop in PrismPrint.c is missing JNICALL that is present in the declaration. This causes build error C2373 on recent versions of Visual Studio.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Build with MSVC 2017

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Successful compilation
ACTUAL -
Build fails with the following error:
modules\javafx.graphics\src\main\native-prism\PrismPrint.c(35): error C2373: 'Java_com_sun_prism_j2d_print_J2DPrinterJob_getAlwaysOnTop': redefinition; different type modifiers
modules\javafx.graphics\build\gensrc\headers\javafx.graphics\com_sun_prism_j2d_print_J2DPrinterJob.h(15): note: see declaration of 'Java_com_sun_prism_j2d_print_J2DPrinterJob_getAlwaysOnTop'

CUSTOMER SUBMITTED WORKAROUND :
Replace the line "JNIEXPORT jobject" with "JNIEXPORT jobject JNICALL" in PrismPrint.c

FREQUENCY : always