To reproduce, use gcc 14 to build JavaFX on Linux. It produces the following error:

modules/javafx.graphics/src/main/native-font/freetype.c: In function 'checkSize':
modules/javafx.graphics/src/main/native-font/freetype.c:523:33: error: initialization of 'jbyte *' {aka 'signed char *'} from incompatible pointer type 'jfloat *' {aka 'float *'} [-Wincompatible-pointer-types]
  523 | jbyte* newPointCoords = (jfloat*)realloc(info->pointCoords, info->lenCoords * sizeof(jfloat));
      | ^
modules/javafx.graphics/src/main/native-font/freetype.c:525:27: error: assignment to 'jfloat *' {aka 'float *'} from incompatible pointer type 'jbyte *' {aka 'signed char *'} [-Wincompatible-pointer-types]
  525 | info->pointCoords = newPointCoords;
      | ^

> Task :graphics:ccLinuxFontFreetype FAILED