~ chicken-core (master) c4c968fc886fea7d26286dadcbda9925ff6ee3a6

commit c4c968fc886fea7d26286dadcbda9925ff6ee3a6
Author:     Mario Domenech Goulart <mario@parenteses.org>
AuthorDate: Thu May 14 12:47:03 2026 +0200
Commit:     felix <felix@call-with-current-continuation.org>
CommitDate: Thu May 14 14:57:22 2026 +0200

    posixunix.scm: Support flock on GNU Hurd
    
    e7aec6fcda introduced support for flock, which requires sys/file.h on
    some platforms.  The inclusion of sys/file.h was conditioned to the
    definition of __linux__ only, which causes flock-related code to be
    undefined on GNU Hurd.
    
    Fix this by including sys/file.h on systems where __GLIBC__ is
    defined.  The check for __linux__ has been kept for compatibility with
    Linux systems that do not use the GNU libc (e.g., musl is used).
    
    Tested on:
    * GNU debian 0.9 GNU-Mach 1.8+git20260224-up-amd64/Hurd-0.9 x86_64 GNU
    * OpenBSD 7.6
    * Alpine Linux 3.23.4 (musl)
    * Haiku R1/beta5
    * Termux on LineageOS 23.2 (Android 16)
    
    Signed-off-by: felix <felix@call-with-current-continuation.org>

diff --git a/posixunix.scm b/posixunix.scm
index 4ffdf531..0f624648 100644
--- a/posixunix.scm
+++ b/posixunix.scm
@@ -49,7 +49,7 @@ static int C_wait_status;
 # include <termios.h>
 #endif
 
-#ifdef __linux__
+#if defined(__linux__) || defined(__GLIBC__)
 # include <sys/file.h>
 #endif