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  1. RHEL
  2. RHEL-49857

fcntl.h header conflict when compiling in RHEL10 beta

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      What were you trying to do that didn't work?

      When compiling a reproducer test case, there are compilation errors on RHEL10: redefinition of: 'struct flock', 'struct flock64', and 'struct f_owner_ex'

       

      The same test case compiles successfully on RHEL-9.5 with kernel 5.14.0-480.el9. and gcc version 11.4.1 20231218.

      Please provide the package NVR for which bug is seen:

      1. uname -r
        6.10.0-15.el10.x86_64
      1. gcc --version
        gcc (GCC) 14.1.1 20240607 (Red Hat 14.1.1-5)

        How reproducible:

      Every time.

      Steps to reproduce

      I cut down test case to just a few lines and tried to run 'gcc -o test test.c'

       

      #define _GNU_SOURCE
      #include <linux/watch_queue.h>
      #include <sys/mount.h>

      int main()

      {    return 0; }

      Expected results

      Successful compilation

      Actual results

      In file included from /usr/include/fcntl.h:35,
                       from /usr/include/sys/mount.h:24,
                       from test.c:3:
      /usr/include/bits/fcntl.h:35:8: error: redefinition of 'struct flock'
         35 | struct flock
            |        ^~~~~
      In file included from /usr/include/asm/fcntl.h:1,
                       from /usr/include/linux/fcntl.h:5,
                       from /usr/include/linux/watch_queue.h:6,
                       from test.c:2:
      /usr/include/asm-generic/fcntl.h:195:8: note: originally defined here
        195 | struct flock {
            |        ^~~~~
      /usr/include/bits/fcntl.h:50:8: error: redefinition of 'struct flock64'
         50 | struct flock64
            |        ^~~~~~~
      /usr/include/asm-generic/fcntl.h:209:8: note: originally defined here
        209 | struct flock64 {
            |        ^~~~~~~
      /usr/include/bits/fcntl-linux.h:267:5: error: expected identifier before numeric constant
        267 |     F_OWNER_TID = 0,            /* Kernel thread.  */
            |     ^~~~~~~~~~~
      In file included from /usr/include/bits/fcntl.h:61:
      /usr/include/bits/fcntl-linux.h:274:8: error: redefinition of 'struct f_owner_ex'
        274 | struct f_owner_ex
            |        ^~~~~~~~~~
      /usr/include/asm-generic/fcntl.h:155:8: note: originally defined here
        155 | struct f_owner_ex {
            |        ^~~~~~~~~~ 

            glibc-bugzilla Platform Tools - Libraries Bot
            rhn-support-rparrazo Rafael Parra Zoquier
            Platform Tools - Libraries Bot Platform Tools - Libraries Bot
            Martin Coufal Martin Coufal
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              Created:
              Updated: