All OpenJDK versions fail to build with glibc 2.34 (this version in the current Fedora and Ubuntu development releases):


/<<PKGBUILDDIR>>/test/hotspot/jtreg/runtime/StackGuardPages/exeinvoke.c: In
function 'set_signal_handler':
/<<PKGBUILDDIR>>/test/hotspot/jtreg/runtime/StackGuardPages/exeinvoke.c:72:15:
error: storage size of 'altstack' isn't constant
    72 | static char altstack[SIGSTKSZ];
       | ^~~~~~~~
gmake[4]: *** [test/JtregNativeHotspot.gmk:1525:
/<<PKGBUILDDIR>>/build/support/test/hotspot/jtreg/native/support/exeinvoke/exeinvoke.o]
Error 1

caused by an intentional change in glibc 2.34:

* Add _SC_MINSIGSTKSZ and _SC_SIGSTKSZ. When _DYNAMIC_STACK_SIZE_SOURCE
  or _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are no longer
  constant on Linux. MINSIGSTKSZ is redefined to sysconf(_SC_MINSIGSTKSZ)
  and SIGSTKSZ is redefined to sysconf (_SC_SIGSTKSZ). This supports
  dynamic sized register sets for modern architectural features like
  Arm SVE.