Do not reference the ioctl() system call in the unix backend unless it

is actually needed by the Batch Atomic Write extension.  This should allow
the build to work on VxWorks.

FossilOrigin-Name: adfa7ed2de3e833fff65935455e71236a59602aaf7b97ece667ab300dca9f673

manifest

@@ -1,5 +1,5 @@
-C Add\sthe\ssqlite_btreeinfo\seponymous-only\stable\sfor\sintrospecting\sthe\sschema\nand\sestimating\sthe\ssizes\sof\svarious\sbtrees.
-D 2017-10-25T01:34:24.293
+C Do\snot\sreference\sthe\sioctl()\ssystem\scall\sin\sthe\sunix\sbackend\sunless\sit\nis\sactually\sneeded\sby\sthe\sBatch\sAtomic\sWrite\sextension.\s\sThis\sshould\sallow\nthe\sbuild\sto\swork\son\sVxWorks.
+D 2017-10-25T16:14:12.910
 F Makefile.in e016061b23e60ac9ec27c65cb577292b6bde0307ca55abd874ab3487b3b1beb2
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 37740aba9c4bb359c627eadccf1cfd7be4f5f847078723777ea7763969e533b1
@@ -258,7 +258,7 @@ F ext/lsm1/test/lsm1_simple.test ca949efefa102f4644231dcd9291d8cda7699a4ce1006b2
 F ext/misc/README.md 8e008c8d2b02e09096b31dfba033253ac27c6c06a18aa5826e299fa7601d90b2
 F ext/misc/amatch.c 6db4607cb17c54b853a2d7c7c36046d004853f65b9b733e6f019d543d5dfae87
 F ext/misc/anycollseq.c 5ffdfde9829eeac52219136ad6aa7cd9a4edb3b15f4f2532de52f4a22525eddb
-F ext/misc/btreeinfo.c 89488a065f5fc3c54f81c589460d69d83cd2f337ae59ed1cf813b8572b258516 w ext/misc/btreelist.c
+F ext/misc/btreeinfo.c 89488a065f5fc3c54f81c589460d69d83cd2f337ae59ed1cf813b8572b258516
 F ext/misc/carray.c ed96c218ea940b85c9a274c4d9c59fe9491c299147a38a8bba537687bd6c6005
 F ext/misc/closure.c 0d2a038df8fbae7f19de42e7c7d71f2e4dc88704
 F ext/misc/completion.c 52c3f01523e3e387eb321b4739a89d1fe47cbe6025aa1f2d8d3685e9e365df0f
@@ -446,7 +446,7 @@ F src/os.c 22d31db3ca5a96a408fbf1ceeaaebcaf64c87024d2ff9fe1cf2ddbec3e75c104
 F src/os.h 48388821692e87da174ea198bf96b1b2d9d83be5dfc908f673ee21fafbe0d432
 F src/os_common.h b2f4707a603e36811d9b1a13278bffd757857b85
 F src/os_setup.h 0dbaea40a7d36bf311613d31342e0b99e2536586
-F src/os_unix.c 3984fc069df59e26f000e30609611cecdb4e93293e6ee52313a473a7e874af1b
+F src/os_unix.c 7edc872747feaa3016bd04e5e4389743bacafc0fee3444b0ecdec5d8f45049df
 F src/os_win.c 6892c3ff23b7886577e47f13d827ca220c0831bae3ce00eea8c258352692f8c6
 F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
 F src/pager.c 07cf850241667874fcce9d7d924c814305e499b26c804322e2261247b5921903
@@ -1665,7 +1665,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P b76bffd332585e8412a0a994ae6dee79a83213d8b709d7f858c5c05678ab0887
-R 2cb01c8a7e418d5768c813428fd16a20
+P 1e30f4772db1e1086096f72d32e87c552923be8b264aa13cf822fae754eb083d
+R 15e40e111eafb5e48910635a49cabea3
 U drh
-Z 2d2691251ae11d16de493df9f4384426
+Z 02638cae8d6ec29df692272f34f9ba5b

manifest.uuid

@@ -1 +1 @@
-1e30f4772db1e1086096f72d32e87c552923be8b264aa13cf822fae754eb083d
+adfa7ed2de3e833fff65935455e71236a59602aaf7b97ece667ab300dca9f673

src/os_unix.c

@@ -513,7 +513,11 @@ static struct unix_syscall {
 #endif
 #define osLstat      ((int(*)(const char*,struct stat*))aSyscall[27].pCurrent)
 
+#if defined(__linux__) && defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE)
   { "ioctl",         (sqlite3_syscall_ptr)ioctl,          0 },
+#else
+  { "ioctl",         (sqlite3_syscall_ptr)0,              0 },
+#endif
 #define osIoctl ((int(*)(int,int,...))aSyscall[28].pCurrent)
 
 }; /* End of the overrideable system calls */