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  1. JDK
  2. JDK-8252248

__SIGRTMAX is not declared in musl libc

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Details

    • Bug
    • Status: Resolved
    • P4
    • Resolution: Fixed
    • 16
    • 16
    • core-libs
    • OS: Alpine Linux 3.11.6
      libc: musl (x86_64) version 1.1.24

    • b14
    • other

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      Description

        Building JDK with musl libc gives the error:
        ---------------------
        src/java.base/linux/native/libnet/linux_close.c:63:25: error: '__SIGRTMAX' undeclared here (not in a function); did you mean 'SIGRTMAX'?
           63 | static int sigWakeup = (__SIGRTMAX - 2);
              | ^~~~~~~~~~
              | SIGRTMAX
        ---------------------

        This is because musl libc does not define __SIGRTMAX constant.

        Simple replacing __SIGRTMAX to SIGRTMAX does not work either because SIGRTMAX is defined as function and not as a constant:
        https://git.musl-libc.org/cgit/musl/tree/include/signal.h#n196

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                alexsch Alexandr Scherbatiy
                alexsch Alexandr Scherbatiy
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                  Created:
                  Updated:
                  Resolved: