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-rw-r--r--sysdeps/mach/hurd/bits/posix_opt.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/bits/posix_opt.h b/sysdeps/mach/hurd/bits/posix_opt.h
index 818df1f94d..47a81c3f73 100644
--- a/sysdeps/mach/hurd/bits/posix_opt.h
+++ b/sysdeps/mach/hurd/bits/posix_opt.h
@@ -66,5 +66,7 @@
 /* We have a POSIX shell.  */
 #define _POSIX_SHELL	1
 
+/* The `spawn' function family is supported.  */
+#define _POSIX_SPAWN	200912L
 
 #endif /* bits/posix_opt.h */