5ebc6b0eb2 bitcoind: update -avoidpartialspends description to account for auto-enable for avoid_reuse wallets (Karl-Johan Alm)
ada258f8c8 doc: release notes for avoid_reuse (Karl-Johan Alm)
27669551da wallet: enable avoid_partial_spends by default if avoid_reuse is set (Karl-Johan Alm)
8f2e208f7c test: add test for avoidreuse feature (Karl-Johan Alm)
0bdfbd34cf wallet/rpc: add 'avoid_reuse' option to RPC commands (Karl-Johan Alm)
f904723e0d wallet/rpc: add setwalletflag RPC and MUTABLE_WALLET_FLAGS (Karl-Johan Alm)
8247a0da3a wallet: enable avoid_reuse feature (Karl-Johan Alm)
eec15662fa wallet: avoid reuse flags (Karl-Johan Alm)
58928098c2 wallet: make IsWalletFlagSet() const (Karl-Johan Alm)
129a5bafd9 wallet: rename g_known_wallet_flags constant to KNOWN_WALLET_FLAGS (Karl-Johan Alm)
Pull request description:
Add a new wallet flag called `avoid_reuse` which, when enabled, will keep track of when a specific destination has been spent from, and will actively "blacklist" any new UTXOs which send to an already-spent-from destination.
This improves privacy, as a payer could otherwise begin tracking a payee's wallet by regularly peppering a known UTXO with dust outputs, which would then be scooped up and used in payments by the payee, allowing the payer to map out (1) the inputs owned by the payee and (2) the destinations to which the payee is making payments.
This replaces #10386 and together with the (now merged) #12257 it addresses #10065 in full. The concerns raised in https://github.com/bitcoin/bitcoin/pull/10386#issuecomment-302361381 are also addressed due to #12257.
~~Note: this builds on top of #15780.~~ (merged)
ACKs for commit 5ebc6b:
jnewbery:
ACK 5ebc6b0eb
laanwj:
Concept and code-review ACK 5ebc6b0eb2
meshcollider:
Code review ACK 5ebc6b0eb2
achow101:
ACK 5ebc6b0eb2 modulo above nits
Tree-SHA512: fdef45826af544cbbb45634ac367852cc467ec87081d86d08b53ca849e588617e9a0a255b7e7bb28692d15332de58d6c3d274ac003355220e4213d7d9070742e
0959d37e3e Don't use global (external) symbols for symbols that are used in only one translation unit (practicalswift)
Pull request description:
Don't use global (external) symbols for symbols that are used in only one translation unit.
Before:
```
$ for SYMBOL in $(nm src/bitcoind | grep -E ' [BD] ' | c++filt | cut -f3- -d' ' | grep -v @ | grep -v : | sort | grep '[a-z]' | sort -u | grep -vE '(^_|typeinfo|vtable)'); do
REFERENCES=$(git grep -lE "([^a-zA-Z]|^)${SYMBOL}([^a-zA-Z]|\$)" -- "*.cpp" "*.h")
N_REFERENCES=$(wc -l <<< "${REFERENCES}")
if [[ ${N_REFERENCES} > 1 ]]; then
continue
fi
echo "Global symbol ${SYMBOL} is used in only one translation unit: ${REFERENCES}"
done
Global symbol g_chainstate is used in only one translation unit: src/validation.cpp
Global symbol g_ui_signals is used in only one translation unit: src/ui_interface.cpp
Global symbol instance_of_cmaincleanup is used in only one translation unit: src/validation.cpp
Global symbol instance_of_cnetcleanup is used in only one translation unit: src/net.cpp
Global symbol instance_of_cnetprocessingcleanup is used in only one translation unit: src/net_processing.cpp
Global symbol pindexBestForkBase is used in only one translation unit: src/validation.cpp
Global symbol pindexBestForkTip is used in only one translation unit: src/validation.cpp
$
```
After:
```
$ for SYMBOL in $(nm src/bitcoind | grep -E ' [BD] ' | c++filt | cut -f3- -d' ' | grep -v @ | grep -v : | sort | grep '[a-z]' | sort -u | grep -vE '(^_|typeinfo|vtable)'); do
REFERENCES=$(git grep -lE "([^a-zA-Z]|^)${SYMBOL}([^a-zA-Z]|\$)" -- "*.cpp" "*.h")
N_REFERENCES=$(wc -l <<< "${REFERENCES}")
if [[ ${N_REFERENCES} > 1 ]]; then
continue
fi
echo "Global symbol ${SYMBOL} is used in only one translation unit: ${REFERENCES}"
done
$
```
♻️ Think about future generations: save the global namespace from unnecessary pollution! ♻️
ACKs for commit 0959d3:
Empact:
ACK 0959d37e3e
MarcoFalke:
ACK 0959d37e3e
hebasto:
ACK 0959d37e3e
promag:
ACK 0959d37.
Tree-SHA512: 722f66bb50450f19b57e8a8fbe949f30cd651eb8564e5787cbb772a539bf3a288c048dc49e655fd73ece6a46f6dafade515ec4004729bf2b3ab83117b7c5d153
faa2a47cd7 logging: Add threadsafety comments (MarcoFalke)
0b282f9b00 Log early messages with -printtoconsole (Anthony Towns)
412987430c Replace OpenDebugLog() with StartLogging() (Anthony Towns)
Pull request description:
Early log messages are dropped on the floor and they'd never make it to the console or debug log. This can be tested by running the test included in this pull request without re-compiling the `bitcoind`.
Fix that by buffering early messages and flushing them as soon as all logging options have been initialized and logging has been started.
This pull request is identical to "Log early messages with -printtoconsole" (#13088) by **ajtowns**, with the following changes:
* Rebased
* Added docstrings for `m_buffering` and `StartLogging`
* Switch `CCriticalSection` (aka `RecursiveMutex`) to just `Mutex` in the last commit
* Added tests
Fixes#16098Fixes#13157Closes#13088
ACKs for commit faa2a4:
ajtowns:
utACK faa2a47cd7
hebasto:
ACK faa2a47cd7
kristapsk:
ACK faa2a47cd7 (ran added functional test before / after recompiling, didn't do additional testing)
Tree-SHA512: 685e2882642fe2a43ce171d42862582dadb840d03cda8236a994322c389ca2a1f3f431b179b2726c155c61793543bb340c568a5455d97f8b83bc7d307a85d387
8a2656702b torcontrol: Use the default/standard network port for Tor hidden services, even if the internal port is set differently (Luke Dashjr)
Pull request description:
Currently, the hidden service is published on the same port as the public listening port.
But if a non-standard port is configured, this can be used to guess (pretty reliably) that the public IP and the hidden service are the same node.
ACKs for top commit:
practicalswift:
utACK 8a2656702b
naumenkogs:
utACK 8a26567
laanwj:
utACK 8a2656702b
Tree-SHA512: 737c8da4f7c3f0bb22a338647d357987f5808156e3f38864168d0d8c2e2b171160812f7da4de11eef602902b304e357d76052950b72d7b3b83535b0fdd05fadc
86b47fa741 speed up Unserialize_impl for prevector (Akio Nakamura)
Pull request description:
The unserializer for prevector uses `resize()` for reserve the area, but it's prefer to use `reserve()` because `resize()` have overhead to call its constructor many times.
However, `reserve()` does not change the value of `_size` (a private member of prevector).
This PR make the logic of read from stream to callback function, and prevector handles initilizing new values with that call-back and ajust the value of `_size`.
The changes are as follows:
1. prevector.h
Add a public member function named 'append'.
This function has 2 params, number of elemenst to append and call-back function that initilizing new appended values.
2. serialize.h
In the following two function:
- `Unserialize_impl(Stream& is, prevector<N, T>& v, const unsigned char&)`
- `Unserialize_impl(Stream& is, prevector<N, T>& v, const V&)`
Make a callback function from each original logic of reading values from stream, and call prevector's `append()`.
3. test/prevector_tests.cpp
Add a test for `append()`.
## A benchmark result is following:
[Machine]
MacBook Pro (macOS 10.13.3/i7 2.2GHz/mem 16GB/SSD)
[result]
DeserializeAndCheckBlockTest => 22% faster
DeserializeBlockTest => 29% faster
[before PR]
# Benchmark, evals, iterations, total, min, max, median
DeserializeAndCheckBlockTest, 60, 160, 94.4901, 0.0094644, 0.0104715, 0.0098339
DeserializeBlockTest, 60, 130, 65.0964, 0.00800362, 0.00895134, 0.00824187
[After PR]
# Benchmark, evals, iterations, total, min, max, median
DeserializeAndCheckBlockTest, 60, 160, 77.1597, 0.00767013, 0.00858959, 0.00805757
DeserializeBlockTest, 60, 130, 49.9443, 0.00613926, 0.00691187, 0.00635527
ACKs for top commit:
laanwj:
utACK 86b47fa741
Tree-SHA512: 62ea121ccd45a306fefc67485a1b03a853435af762607dae2426a87b15a3033d802c8556e1923727ddd1023a1837d0e5f6720c2c77b38196907e750e15fbb902
8053e5cdad Remove -mempoolreplacement to prevent needless block prop slowness. (Matt Corallo)
Pull request description:
At this point there is no reasonable excuse to disable opt-in RBF,
and, unlike when this option was added, there are now significant
issues created when disabling it (in the form of compact block
reconstruction failures). Further, it breaks a lot of modern wallet
behavior.
This removes an option that is:
* (a) only useful when a large portion of (other) miners enforce it as well
* (b) is detrimental to everyone (income for miners, RBF notifications for others) who uses it individually otherwise
* (c) is effectively unused
* (d) is often confused with disabling RBF (rather than just remaining stubbornly unaware of it while the rest of the network lets it through)
ACKs for commit 8053e5:
practicalswift:
utACK 8053e5cdad
promag:
Deprecation would save from unlikely rantings, still ACK 8053e5c.
jtimon:
utACK 8053e5cdad
ajtowns:
ACK 8053e5cdad -- quick code review, checked tests work
MarcoFalke:
ACK 8053e5cdad
Tree-SHA512: 01aee8905b2487fc38a3a86649d422d2d2345bc60f878889ebda4b8680783e1f1a97c2000c27ef086719501be2abc2911b2039a259a5e5c04f3b24ff02b0427e
fa499b5f02 rpc: bugfix: Properly use iswitness in converttopsbt (MarcoFalke)
fa5c5cd141 rpc: Switch touched RPCs to IsValidNumArgs (MarcoFalke)
Pull request description:
When a serialized transaction has inputs, there is no risk in only trying to deserialize it with witness allowed. (This is how all transactions from p2p are deserialized.) In fact, it would avoid a common issue where a transaction with inputs can be deserialized in two ways:
* Fixes#12989
* Fixes#15872
* Fixes#15701
* Fixes#13738
* ...
When a serialized transaction has no inputs, there is no risk in only trying to deserialze it with witness disallowed. (A transaction without inputs can't have corresponding witness data)
ACKs for commit fa499b:
meshcollider:
utACK fa499b5f02
ryanofsky:
utACK fa499b5f02. Changes since last review: consolidating commits and making iswitness documentation the same across methods.
PastaPastaPasta:
utACK fa499b5f02
Tree-SHA512: a64423a3131f3f0222a40da557c8b590c9ff01b45bcd40796f77a1a64ae74c6680a6be9d01ece95c492dfbcc7e2810409d2c2b336c2894af00bb213972fc85c6
f8995807e4 tests: Make coins_tests/updatecoins_simulation_test deterministic (practicalswift)
Pull request description:
Make `coins_tests/updatecoins_simulation_test` deterministic.
Before:
```
$ contrib/devtools/test_deterministic_coverage.sh 1000
[2019-06-15 05:36:20] Measuring coverage, run #1 of 1000
[2019-06-15 05:38:05] Measuring coverage, run #2 of 1000
[2019-06-15 05:39:49] Measuring coverage, run #3 of 1000
[2019-06-15 05:41:38] Measuring coverage, run #4 of 1000
[2019-06-15 05:43:16] Measuring coverage, run #5 of 1000
...
[2019-06-16 18:25:23] Measuring coverage, run #880 of 1000
[2019-06-16 18:27:12] Measuring coverage, run #881 of 1000
[2019-06-16 18:29:33] Measuring coverage, run #882 of 1000
[2019-06-16 18:33:00] Measuring coverage, run #883 of 1000
[2019-06-16 18:35:32] Measuring coverage, run #884 of 1000
The line coverage is non-deterministic between runs. Exiting.
The test suite must be deterministic in the sense that the set of lines executed at least
once must be identical between runs. This is a necessary condition for meaningful
coverage measuring.
--- gcovr.run-1.txt 2019-06-15 05:38:05.282359029 +0200
+++ gcovr.run-884.txt 2019-06-16 18:37:23.518298374 +0200
@@ -269,7 +269,7 @@
test/bloom_tests.cpp 320 320 100%
test/bswap_tests.cpp 13 13 100%
test/checkqueue_tests.cpp 223 222 99% 169
-test/coins_tests.cpp 478 472 98% 52,68,344-345,511,524
+test/coins_tests.cpp 478 474 99% 52,68,511,524
test/compilerbug_tests.cpp 18 18 100%
test/compress_tests.cpp 27 27 100%
test/crypto_tests.cpp 268 268 100%
@@ -401,5 +401,5 @@
zmq/zmqpublishnotifier.h 5 0 0% 12,31,37,43,49
zmq/zmqrpc.cpp 23 3 13% 16,18,20,23,33-35,37,40-47,51,62,64-65
------------------------------------------------------------------------------
-TOTAL 53323 28305 53%
+TOTAL 53323 28307 53%
------------------------------------------------------------------------------
```
After:
```
$ contrib/devtools/test_deterministic_coverage.sh 1000
[2019-06-15 05:36:20] Measuring coverage, run #1 of 1000
[2019-06-15 05:38:05] Measuring coverage, run #2 of 1000
[2019-06-15 05:39:49] Measuring coverage, run #3 of 1000
[2019-06-15 05:41:38] Measuring coverage, run #4 of 1000
[2019-06-15 05:43:16] Measuring coverage, run #5 of 1000
...
$
```
ACKs for commit f89958:
MarcoFalke:
ACK f8995807e4 (checked that the randomness state of g_insecure_rand_ctx is the same after three test runs)
Tree-SHA512: 796d362b050c5750e351de1126b62f0f2c8e2d712cf01b6e1a3e2cc6ef92fa68439a32fc24c76d34bce4d553aee4ae4ea88a036c56eb9e25979649a19c59c3e5
fa1d766717 tests: Make msg_block a witness block (MarcoFalke)
fa52eb55c9 test: Remove True argument to CBlock::serialize (MarcoFalke)
Pull request description:
Unnamed arguments are confusing as to what they mean without looking up the function signature.
Since segwit is active by default in regtest, and all blocks are serialized with witness (#15664), remove the argument `with_witness=True` from all calls to `CBlock::serialize` and `BlockTransactions::serialize`.
ACKs for commit fa1d76:
laanwj:
code-review ACK fa1d766717
Tree-SHA512: 2c550646f99c9ca86a223ca988c61a730f5e6646807adeaa7174fb2424a32cea3fef8bcd3e0b12e162e7ff192877d0c02fd0654df6ee1a9b821b065707c2dcbc
c59e3a3261 getrawtransaction: inform about blockhash argument when lookup fails (darosior)
Pull request description:
Just 4 words added on `getrawtransaction` lookup error to fix#16142
ACKs for commit c59e3a:
Tree-SHA512: 2219099c1240667527a9b1498a58818b5ff1c2ef366c498d2bb57963e828b3c87fa3e6b94be7e6463bd289ceabc13f9c9b1082134641594ba335ac400e6d63aa
- Fetch the ACKs only at sign-off time. This makes sure that any
last-minute ACKs are included (fixes#16200)
- Show a list of ACKs and their author before signing off, and warn if
there are none
fa8f195195 Replace remaining fprintf with tfm::format manually (MarcoFalke)
fac03ec43a scripted-diff: Replace fprintf with tfm::format (MarcoFalke)
fa72a64b90 tinyformat: Add doc to Bitcoin Core specific strprintf (MarcoFalke)
Pull request description:
This should be a refactor except in the cases where we use the wrong format specifier [1], in which case this patch is a bug fix.
[1] : e.g. depends: Add libevent compatibility patch for windows #8730
ACKs for commit fa8f19:
promag:
ACK fa8f195195. Ideally this should be rebased before merge.
practicalswift:
utACK fa8f195195
Empact:
ACK fa8f195195
laanwj:
code review and lightly tested ACK fa8f195195
jonatack:
ACK fa8f195195 from light code review, building, and running linter/unit tests/extended functional tests.
Tree-SHA512: 65f648b0bc383e3266a5bdb4ad8c8a1908a719635d49e1cd321b91254be24dbc7e22290370178e29b98ddcb3fec0889de9cbae273c7140abc9793d849534a743
fac5ddfc57 doc: Rework section on ACK (MarcoFalke)
Pull request description:
`utACK` and `t(ested) ACK` are deprecated and will be removed in the next major release. Please use the more generic `ACK` and include an explanation of what was reviewed.
There was a related discussion in http://diyhpl.us/wiki/transcripts/bitcoin-core-dev-tech/2019-06-05-code-review/ section `The author could offer a guide for review`.
ACKs for commit fac5dd:
moneyball:
ACK fac5ddfc57
Tree-SHA512: 29177e8d96aeba055b5cad6d99be3ca1be0c61af0fdc90f70a3136872c9ad6201a02f63fbac78b90b8a56b4c06af304f2583d52a94fdd954fdcc7ad0552b9ef8
b748bf6f50 Fix spelling errors identified by codespell 1.15.0 (Ben Woosley)
Pull request description:
Note all changes are to comments / documentation.
After this commit, the only remaining output is:
```
$ test/lint/lint-spelling.sh
src/test/base32_tests.cpp:14: fo ==> of, for
src/test/base64_tests.cpp:14: fo ==> of, for
^ Warning: codespell identified likely spelling errors. Any false positives? Add them to the list of ignored words in test/lint/lint-spelling.ignore-words.txt
```
Note:
* I ignore several valid alternative spellings ~, but changed homogenous
to homogeneous as the latter is a more specific term according to the
Google dictionary definitions I found~
* homogenous is present in tinyformat, hence should be addressed upstream
* process' is correct only if there are plural processes
ACKs for commit b748bf:
practicalswift:
ACK b748bf6f50
fanquake:
ACK b748bf6f50
Tree-SHA512: 9add7044643ce015e0a44d8b27a3f300d72c485ffff550fb6491a17f14528085289ec5caddfe02f291ea9b2cded38a0dd3079652a054e2d7fe2ff4f7b53db5d7
fa4bc4ebf9 doc: Remove explicit mention of version from SECURITY.md (MarcoFalke)
Pull request description:
The repo should not contain documentation that is not tied to any release. For example meta information like a list of maintained versions of Bitcoin Core falls into this scope.
Replace the list of versions in `./SECURITY.md` with a link to the website.
ACKs for commit fa4bc4:
Empact:
ACK fa4bc4ebf9
fanquake:
ACK fa4bc4ebf9
laanwj:
ACK fa4bc4ebf9
jonatack:
ACK fa4bc4ebf9
Tree-SHA512: 152b5b19b3620b0bc63536f582340628019b8ea92429db44f232a01bfa1893b767735bf94ca693a683769eb046b160e92c72de6efb3da328f2b0ee9f4750f465
88884c6f75 travis: Use absolute paths for cache dirs (MarcoFalke)
fae9d54abc travis: Fix caching issues (MarcoFalke)
Pull request description:
It appears that the travis caching infrastructure changed under us without any notice. I believe we can no longer use relative paths as cache paths, unless:
* we go back to the root travis build dir before the caching step, or
* we specify absolute paths for caching
Apply both fixes here.
Thanks to **promag** for helping me debug this: https://github.com/bitcoin/bitcoin/issues/16148#issuecomment-502078938
ACKs for commit 88884c:
Empact:
ACK 88884c6f75
Tree-SHA512: 04f2987aade4e8bb016862ba81aea4bb90573a0bf0d2e51b0411c6e3687ee8ec3b639627c0950f51bc8ae4bbf5e0799672c9a81dfb03f01eb5b08791ba857a4a
067fba563 devtools: Always use unabbreviated commit IDs in github-merge.py (Wladimir J. van der Laan)
Pull request description:
Always put the unabbreviated commit IDs in the generated commit messages and other places. This prevents the developer's `core.abbrev` git setting from leaking through and is better against ambiguity too.
ACKs for commit 067fba:
MarcoFalke:
ACK 067fba5631 (replaces `h` with `H`, didn't test)
promag:
ACK 067fba5631, from the documentation https://git-scm.com/docs/pretty-formats:
fanquake:
ACK 067fba5631. Tested by merging this PR into master, then merging a second PR ontop and checking that full commit hashes were being used. Also checked documentation linked to above. Did not check that this works when a different `core.abbrev` is set locally.
Tree-SHA512: a851d10490cd8bcd8bca29094b08a6b9f883cfe1b0767ccda7ca789e4c8eff6260a4d82c33cb3d9bab01dd30ac8c9100cb7adbcb1911bb399d9385c1e1f15ecd
f402012cc fixup: Fix prunning test (João Barbosa)
97f517dd8 Fix RPC/pruneblockchain returned prune height (Jonas Schnelli)
Pull request description:
The help of `pruneblockchain` tells us that the return value is `Height of the last block pruned.`,... but the implementation naively returns the provided input `height` and therefore not respecting that pruning can't be done on all possible blockheight due to the fact that we only prune complete blockfiles (which combine multiple blocks).
This fixes the return value to actually return the correct prune height.
ACKs for commit f40201:
MarcoFalke:
ACK f402012ccf
Tree-SHA512: 88c910030ffb83196663e5ebebc29d036fcdbbb2ab266e4538991867924a61bacd8361c1fbf294a0ea7e02347ae183d792f10a10b8f6187e8a4c4c6e4124d7e6
75485ef09 gui: Enable open wallet menu on setWalletController (João Barbosa)
Pull request description:
`BitcoinApplication::initializeResult` and `BitcoinGUI::setWalletController` are only called after the startup rescan is completed. While the rescan is in progress the window menus are already available.
This PR makes the Open Wallet menu disabled until `BitcoinGUI::setWalletController` is called.
![Screenshot 2019-05-29 at 14 17 48](https://user-images.githubusercontent.com/3534524/58560510-35377480-821d-11e9-8f96-d0573c9e47b0.png)
Fixes#16087
ACKs for commit 75485e:
jonasschnelli:
utACK 75485ef096
ryanofsky:
utACK 75485ef096. It's a simple, sensible fix.
Tree-SHA512: 9395ceed54bbceb6cbf1cd443f783d07a6ebb8fc5515b63c6e1b8b19b216b08d1cba7eaf872814d7c426ab7192f3b416ba0d57fc84f3bcbfebf01ce153794201
Always put the unabbreviated commit IDs in the generated commit messages
and other places. This prevents the developer's `core.abbrev` git setting
from leaking through and is better against ambiguity too.
308b76732f Fix bug around transaction requests (Suhas Daftuar)
f635a3ba11 Expire old entries from the in-flight tx map (Suhas Daftuar)
e32e08407e Remove NOTFOUND transactions from in-flight data structures (Suhas Daftuar)
23163b7593 Add an explicit memory bound to m_tx_process_time (Suhas Daftuar)
218697b645 Improve NOTFOUND comment (Suhas Daftuar)
Pull request description:
#14897 introduced several bugs that could lead to a node no longer requesting transactions from one or more of its peers. Credit to ajtowns for originally reporting many of these bugs along with an originally proposed fix in #15776.
This PR does a few things:
- Fix a bug in NOTFOUND processing, where the in-flight map for a peer was keeping transactions it shouldn't
- Eliminate the possibility of a memory attack on the CNodeState `m_tx_process_time` data structure by explicitly bounding its size
- Remove entries from a peer's in-flight map after 10 minutes, so that we should always eventually resume transaction requests even if there are other bugs like the NOTFOUND one
- Fix a bug relating to the coordination of request times when multiple peers announce the same transaction
The expiry mechanism added here is something we'll likely want to remove in the future, but is belt-and-suspenders for now to try to ensure we don't have other bugs that could lead to transaction relay failing due to some unforeseen conditions.
ACKs for commit 308b76:
ajtowns:
utACK 308b76732f
morcos:
light ACK 308b767
laanwj:
Code review ACK 308b76732f
jonatack:
Light ACK 308b76732f.
jamesob:
ACK 308b76732f
MarcoFalke:
ACK 308b76732f (Tested two of the three bugs this pull fixes, see comment above)
jamesob:
Concept ACK 308b76732f
MarcoFalke:
ACK 308b76732f
Tree-SHA512: 8865dca5294447859d95655e8699085643db60c22f0719e76e961651a1398251bc932494b68932e33f68d4f6084579ab3bed7d0e7dd4ac6c362590eaf9414eda
xtrans does not understand the --with-pic and --disable-shared flags we
pass it because it is not a library. Instead, we should pass it flags
that disable features/packages we're not using so they don't get a
chance to sneak in.