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-rw-r--r--linuxthreads/sysdeps/unix/sysv/linux/i386/vfork.S2
1 files changed, 2 insertions, 0 deletions
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/i386/vfork.S b/linuxthreads/sysdeps/unix/sysv/linux/i386/vfork.S
index f4a56a54bf..95df1330dd 100644
--- a/linuxthreads/sysdeps/unix/sysv/linux/i386/vfork.S
+++ b/linuxthreads/sysdeps/unix/sysv/linux/i386/vfork.S
@@ -86,6 +86,8 @@ ENTRY (__vfork)
jae SYSCALL_ERROR_LABEL
.Lpseudo_end:
ret
+#elif !defined __NR_vfork
+# error "__NR_vfork not available and __ASSUME_VFORK_SYSCALL defined"
#endif
PSEUDO_END (__vfork)
libc_hidden_def (__vfork)