This commit does not change behavior, it just drops unnecessary IsArgSet()
calls for -debug, -loglevel, and -vbparams options. The calls are unnecessary
because GetArgs() already returns empty arrays if these arguments are not
specified.
Treat specifying -noexternalip the same as not specifying -externalip, instead
of causing it to soft-set the -discover default to false.
Before this change, was -noexternalip basically an undocumented synonym for
-nodiscover.
After this change, specifying -noexternalip just clears previously specifed
-externalip options, restoring default behavior as if they were not were
specified.
The previous -noexternalip behavior wasn't neccessarily bad, but it was
undocumented, redundant with the -nodiscover option, and inconsistent with
behavior of other list options.
Treat specifying -noonlynet the same as not specifying -onlynet, instead of
marking all networks unreachable.
Before this change, specifying -noonlynet cleared list of reachable networks
and did not allow connecting to any network. It was basically an undocumented
synonym for -noconnect.
After this change, specifying -nononlynet just clears previously specifed
-onlynet options and allows connecting to all networks, restoring default
behavior as if no -onlynet options were specified.
Before this change, there was no way to restore default behavior once an
-onlynet option was specified. So for example, if a config file specifed
onlynet settings, they couldn't be reset on the command line without disabling
the entire config file.
The previous -noonlynet behavior wasn't neccessarily bad, but it was
undocumented, redundant with the -noconnect option, inconsistent with behavior
of other list options, and inconsistent with being able to use the command line
to selectively override config options. It was also probably unintended,
arising from use of the IsArgSet() method and its interaction with negated
options.
Treat specifying -norpcwallet the same as not specifying any -rpcwallet option,
instead of treating it like -rpcwallet=0 with 0 as the wallet name.
This restores previous behavior before 743077544b
from https://github.com/bitcoin/bitcoin/pull/18594, which inadvertently changed
it.
Treat specifying -norpcwhitelist the same as not specifying -rpcwhitelist,
instead of behaving almost the same but flipping the default
-rpcwhitelistdefault value.
This is confusing because before this change if -norpcwhitelist was specified
it would block users from calling any RPC methods.
Treat specifying -norpcbind and -norpcallowip the same as not specifying
-rpcbind or -rpcallowip, instead of failing to bind to localhost and failing to
show warnings.
Also add code comment to clarify what intent of existing code is.
Treat specifying -noseednode the same as not specifying any -seednode value,
instead of enabling the seed node timeout and log messages, and waiting longer
to add other seeds.
7afeaa2469 test: `-debug=0` and `-debug=none` behave similarly to `-nodebug` (Daniela Brozzoni)
a8fedb36a7 logging: Ensure -debug=0/none behaves consistently with -nodebug (Daniela Brozzoni)
d39d521d86 test: `-nodebug` clears previously set debug options (Daniela Brozzoni)
Pull request description:
Previously, -nodebug cleared all prior -debug configurations in the command line while allowing subsequent debug options to be applied.
However, -debug=0 and -debug=none completely disabled debugging, even for categories specified afterward.
This commit ensures consistency by making -debug=0 and -debug=none behave like -nodebug: they now clear previously set debug configurations but do not disable debugging for categories specified later.
See https://github.com/bitcoin/bitcoin/pull/30529#discussion_r1930956563
ACKs for top commit:
hodlinator:
re-ACK 7afeaa2469
ryanofsky:
Code review ACK 7afeaa2469. Nicely implemented change with test and release notes, and I like how the test is implemented as the first commit.
maflcko:
review ACK 7afeaa2469👡
Tree-SHA512: c69b17ff10da6c88636bd01918366dd408832e70f2d0a7b951e9619089e89c39282db70398ba2542d3aa69a2fe6b6a0a01638b3225aff79d234d84d3067f2caa
Similar to #31840, currently our Linux toolchain file contains:
```bash
set(CMAKE_AR "aarch64-linux-gnu-ar")
set(CMAKE_RANLIB "aarch64-linux-gnu-ranlib")
set(CMAKE_STRIP "aarch64-linux-gnu-strip")
set(CMAKE_OBJCOPY "aarch64-linux-gnu-objcopy")
set(CMAKE_OBJDUMP "")
```
`objdump` is currently only used for the macOS cross build, where it's
`llvm-objdump`, but we should be consistent in producing a toolchain
file that points to actual tools, rather than leaving variables unset.
* `CConnman::CalculateKeyedNetGroup()` needs `CNetAddr`, not `CAddress`,
thus change its argument.
* Both callers of `CConnman::CreateNodeFromAcceptedSocket()` create a
dummy `CAddress` from `CService`, so use `CService` instead.
* `GetBindAddress()` only needs to return `CService`.
* `CNode::addrBind` only needs to be `CService`.
e3c0152769 cmake: Copy `cov_tool_wrapper.sh.in` to the build tree (Hennadii Stepanov)
Pull request description:
This PR ensures that `cov_tool_wrapper.sh.in` is available when invoking the `Coverage.cmake` script from any directory.
Here is an example of usage on Ubuntu 24.10 with the default GCC 14.2.0:
```
$ cmake -B build -DCMAKE_BUILD_TYPE=Coverage -DCMAKE_CXX_FLAGS="-fprofile-update=atomic" -DCMAKE_C_FLAGS="-fprofile-update=atomic"
$ cmake --build build -j $(nproc)
$ cd ..
$ cmake -DJOBS=$(nproc) -DLCOV_OPTS="--ignore-errors inconsistent,inconsistent" -P bitcoin/build/Coverage.cmake
```
Fixes https://github.com/bitcoin/bitcoin/issues/31638.
ACKs for top commit:
theuni:
utACK e3c0152769
Tree-SHA512: ccfc8e893567f199d9b05ea3916cac06fca89c5892cc7492d5251c331c35408222fd918ed08017515e2dfca10970ae3f633b3917bfb7037db539559e71d7f711
If the instructions are followed as-is, and "Developer
(PowerShell|Command Prompt) for VS 2022" is used to execute the
suggested build commands, the root directory of vcpkg (e.g. in VS 2022
Community edition: `C:\Program Files\Microsoft Visual
Studio\2022\Community\VC\vcpkg`), is too long, and when vcpkg attempts
to build any of the QT packages, it will fail because of build steps
that require path lengths greater than Windows' `MAX_PATH` 260 character
limit. This can be avoided without needing to move the vcpkg root dir by
setting `--x-buildtrees-root` to a short path, like `C:\vcpkg`.
3edaf0b428 depends: add missing Darwin objcopy (fanquake)
Pull request description:
Our CMake toolchain for a Darwin cross build currently contains:
```bash
set(CMAKE_AR "/usr/bin/llvm-ar")
set(CMAKE_RANLIB "/usr/bin/llvm-ranlib")
set(CMAKE_STRIP "/usr/bin/llvm-strip")
set(CMAKE_OBJCOPY "arm64-apple-darwin-objcopy")
set(CMAKE_OBJDUMP "/usr/bin/llvm-objdump")
```
`objcopy` isn't currently used for the Darwin build (only for Linux and splitting the debug symbols), but we shouldn't be producing a toolchain file that refers to nonexistent tools.
ACKs for top commit:
laanwj:
Code review ACK 3edaf0b428
theuni:
utACK 3edaf0b428
Tree-SHA512: b74deb9f3f053c37d03505e698419d4a14131131f12a042dab698a81f2ad76b71fd55c1d1afd5f5822cc50fdaad5acdab15a8b20626c56f705179add1165449f
ConsumeData() will always try to return a name as long as the requested size. It is more useful, and
closer to how `getsockname` would actually behave in reality, to return a random length name
instead.
This was hindering coverage in the PCP fuzz target as the addr len was set to the size of the
sockaddr_in struct and would exhaust all the provided data from the fuzzer.
Thanks to Marco Fleon for suggesting this.
Co-Authored-by: marcofleon <marleo23@proton.me>
f89f16846e depends: Fix compiling `libevent` package on NetBSD (Hennadii Stepanov)
Pull request description:
Libevent [introduced](https://github.com/libevent/libevent/pull/909) the [`typeof`](https://gcc.gnu.org/onlinedocs/gcc/Typeof.html) C language extension in the NetBSD-specific code, which was pulled into our depends in https://github.com/bitcoin/bitcoin/pull/21991.
However, GCC [states](https://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html):
> the various `-std` options disable certain keywords.
Due to our use of b042c4f053/depends/hosts/netbsd.mk (L1)
the `typeof` keyword is disabled, resulting in a compilation error:
```
$ gmake -C depends libevent CC=/usr/pkg/gcc14/bin/gcc CXX=/usr/pkg/gcc14/bin/g++
<snip>
[ 37%] Building C object CMakeFiles/event_core_static.dir/kqueue.c.o
/home/hebasto/dev/bitcoin/depends/work/build/x86_64-unknown-netbsd10.0/libevent/2.1.12-stable-ca6b96ec97c/kqueue.c: In function 'kq_setup_kevent':
/home/hebasto/dev/bitcoin/depends/work/build/x86_64-unknown-netbsd10.0/libevent/2.1.12-stable-ca6b96ec97c/kqueue.c:56:27: error: implicit declaration of function 'typeof' [-Wimplicit-function-declaration]
56 | #define INT_TO_UDATA(x) ((typeof(((struct kevent *)0)->udata))(intptr_t)(x))
| ^~~~~~
/home/hebasto/dev/bitcoin/depends/work/build/x86_64-unknown-netbsd10.0/libevent/2.1.12-stable-ca6b96ec97c/kqueue.c:190:30: note: in expansion of macro 'INT_TO_UDATA'
190 | out->udata = INT_TO_UDATA(ADD_UDATA);
| ^~~~~~~~~~~~
/home/hebasto/dev/bitcoin/depends/work/build/x86_64-unknown-netbsd10.0/libevent/2.1.12-stable-ca6b96ec97c/kqueue.c:56:64: error: expected expression before 'intptr_t'
56 | #define INT_TO_UDATA(x) ((typeof(((struct kevent *)0)->udata))(intptr_t)(x))
| ^~~~~~~~
/home/hebasto/dev/bitcoin/depends/work/build/x86_64-unknown-netbsd10.0/libevent/2.1.12-stable-ca6b96ec97c/kqueue.c:190:30: note: in expansion of macro 'INT_TO_UDATA'
190 | out->udata = INT_TO_UDATA(ADD_UDATA);
| ^~~~~~~~~~~~
/home/hebasto/dev/bitcoin/depends/work/build/x86_64-unknown-netbsd10.0/libevent/2.1.12-stable-ca6b96ec97c/kqueue.c:56:27: error: called object is not a function or function pointer
56 | #define INT_TO_UDATA(x) ((typeof(((struct kevent *)0)->udata))(intptr_t)(x))
| ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/hebasto/dev/bitcoin/depends/work/build/x86_64-unknown-netbsd10.0/libevent/2.1.12-stable-ca6b96ec97c/kqueue.c:190:30: note: in expansion of macro 'INT_TO_UDATA'
190 | out->udata = INT_TO_UDATA(ADD_UDATA);
| ^~~~~~~~~~~~
gmake[3]: *** [CMakeFiles/event_core_static.dir/build.make:328: CMakeFiles/event_core_static.dir/kqueue.c.o] Error 1
<snip>
```
This PR resolves this issue by following GCC's [recommendation](https://gcc.gnu.org/onlinedocs/gcc/Typeof.html):
> write `__typeof__` instead of `typeof`.
ACKs for top commit:
fanquake:
ACK f89f16846e
Tree-SHA512: c0d2e535408db120535781f8518c616b0f5a39b1c6babb2a74e8e0565348aaf00b0f5a93cac0af7cf6d6bf028d5d58763fe71b3969ed9c7059fa7c3dca9d084c
The fuzz provider's `ConsumeData` may return less data than necessary
to fill the sockaddr struct and still return success. Fix this to avoid
the caller using uninitialized memory.
12fa9511b5 build: simplify dependency graph (Cory Fields)
c4e498300c build: avoid unnecessary dependencies on generated headers (Cory Fields)
Pull request description:
These changes speed up my build (default config/options/targets) by roughly 10%. I suspect the difference may be more significant in other build configs.
Before:
> $ time cmake --build build -j24
> real3m26.932s
After:
> $ time cmake --build build -j24
> real3m7.556s
Generally they allow for jobservers (either `make -jX` or `ninja`) to be better utilized. This can be verified using `top` while building and looking at the number of compiles running at any given time before/after these changes. Before, it's easy to observe periods of stalling when only one or two compiles are happening. After these changes, the compiler process count should mostly match the number of jobs given (`-jX`) until it falls off at the end.
---
The first commit sets [DEPENDS_EXPLICIT_ONLY](https://cmake.org/cmake/help/latest/command/add_custom_command.html#command:add_custom_command) for commands which generate our test header files. Without this option, `test_bitcoin`'s generated headers won't be built until all of its other dependencies have been built. This introduces a significant stall in the build, though currently only Ninja benefits from this being set, and only CMake >= 3.27 understands it.
Example from a generated `build.ninja`:
Before:
> \# Custom command for src/test/data/base58_encode_decode.json.h
>
> build src/test/data/base58_encode_decode.json.h | ${cmake_ninja_workdir}src/test/data/base58_encode_decode.json.h: CUSTOM_COMMAND /home/cory/dev/bitcoin/src/test/data/base58_encode_decode.json /home/cory/dev/bitcoin/cmake/script/GenerateHeaderFromJson.cmake || libcrc32c.a libcrc32c_sse42.a libleveldb.a libminisketch.a minisketch_clmul src/bitcoin_clientversion src/crypto/libbitcoin_crypto.a src/crypto/libbitcoin_crypto_avx2.a src/crypto/libbitcoin_crypto_sse41.a src/crypto/libbitcoin_crypto_x86_shani.a src/generate_build_info src/libbitcoin_cli.a src/libbitcoin_common.a src/libbitcoin_consensus.a src/libbitcoin_node.a src/secp256k1/src/libsecp256k1.a src/secp256k1/src/secp256k1_precomputed src/test/util/libtest_util.a src/univalue/libunivalue.a src/util/libbitcoin_util.a src/wallet/libbitcoin_wallet.a src/zmq/libbitcoin_zmq.a
After:
> \# Custom command for src/test/data/base58_encode_decode.json.h
>
> build src/test/data/base58_encode_decode.json.h | ${cmake_ninja_workdir}src/test/data/base58_encode_decode.json.h: CUSTOM_COMMAND /home/cory/dev/bitcoin/src/test/data/base58_encode_decode.json /home/cory/dev/bitcoin/cmake/script/GenerateHeaderFromJson.cmake
---
The second commit is more significant. It sets [CMAKE_OPTIMIZE_DEPENDENCIES](https://cmake.org/cmake/help/latest/prop_tgt/OPTIMIZE_DEPENDENCIES.html) globally, which allows the objects of static libs to be built in parallel when one lib depends on the other. This can be set as a per-lib property, ~but I don't see any need for that as we don't currently have any edge-cases where this wouldn't be ok. If those should arise, we could always disable on a per-lib basis~.
Edit: turns out this triggers an [upstream bug](https://gitlab.kitware.com/cmake/cmake/-/issues/24058), which I guess can be considered an edge-case until fixed in CMake. I've added 2 per-lib opt-outs as a result.
Example:
Before:
> \# Link the static library src/libbitcoin_cli.a
>
> build src/libbitcoin_cli.a: CXX_STATIC_LIBRARY_LINKER__bitcoin_cli_RelWithDebInfo src/CMakeFiles/bitcoin_cli.dir/compat/stdin.cpp.o src/CMakeFiles/bitcoin_cli.dir/rpc/client.cpp.o || src/univalue/libunivalue.a
After:
> \# Link the static library src/libbitcoin_cli.a
>
> build src/libbitcoin_cli.a: CXX_STATIC_LIBRARY_LINKER__bitcoin_cli_RelWithDebInfo src/CMakeFiles/bitcoin_cli.dir/compat/stdin.cpp.o src/CMakeFiles/bitcoin_cli.dir/rpc/client.cpp.o
>
ACKs for top commit:
l0rinc:
utACK 12fa9511b5
hebasto:
ACK 12fa9511b5.
Tree-SHA512: f85f507e70cdc06acd07542161d9f9b8edf9ba866f08c8ef17aaaed770fa11530a27521c4413456d863463a6e77d4d6983fa623a64e17bbd602c2bc70aacc112
fa952acdb6 ci: Skip read-write of default env vars (MarcoFalke)
Pull request description:
If they remain unset, they use the default anyway. Except for `USER`, but this seems unused anyway.
Can be checked via:
```
sh-5.2# touch /tmp/empty_env
sh-5.2# podman run --rm --env-file /tmp/empty_env 'ubuntu:24.04' env
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
container=podman
HOME=/root
HOSTNAME=19ece5c9e052
ACKs for top commit:
0xB10C:
ACK fa952acdb6
Prabhat1308:
utACK [fa952ac](fa952acdb6)
Tree-SHA512: fe0c173b23cfda3025306303a44ffe32ecc57c2e0e1a2376594696f9887ed22f5105da84e898e790041bf15a4aa42a365fba016710ad269d439dda691977be90
fa3a4eafa1 test: Remove stale gettime test (MarcoFalke)
Pull request description:
The `gettime` test is stale:
* It was added to sanity check the `time` implementation in the mingw toolchain to catch a 32-bit vs 64-bit mismatch in commit eaafa23cbd. However, since commit 0000a63689, `std::chrono::system_clock` is used.
* Even though `system_clock` may also return incorrect values, such an error should affect *all* `GetTime<>` calls (not only the second-precision ones). (I expect such an error to lead to a signed integer overflow in the normal nanosecond precision, so it should be caught by ubsan or by the `assert(ret > 0s)`. If not, the error should be apparent on startup in the debug log.)
So remove it for now. An alternative would be to extend the test to cover `time` again, and adjust the comment to say that the test should be fixed along with the block header timestamp. Since that timestamp can't grow beyond 2106 anyway, see the `_test_y2106` functional test.
ACKs for top commit:
l0rinc:
ACK fa3a4eafa1
laanwj:
ACK fa3a4eafa1
Tree-SHA512: fd485e74962b659ee23ba2952d284fa9d6cfb9d9844a5e70013c8ead495ed77f5b784d5ca3ba0b30c492a5d27b2e81f9e1e0dbc530af7da1494789ac5e055b99
b28917be36 depends: Make default `host` and `build` comparable (Hennadii Stepanov)
Pull request description:
To detect cross-compiling, the host and build platforms are compared. The `build` variable is always an output of `config.sub`, but the `host` is not. This can lead to false results. For example, on OpenBSD:
- host=amd64-unknown-openbsd7.5
- build=x86_64-unknown-openbsd7.5
This PR sets the default value of the `host` variable to the value of `build`, ensuring cross-compiling won't be triggered when the `HOST` variable is not set.
This PR fixes needless triggering of cross-compiling for CMake-built packages in depends on OpenBSD due to this code:eb85cacd29/depends/funcs.mk (L193-L197)
No changes in Guix build.
ACKs for top commit:
laanwj:
Concept and code review ACK b28917be36
theuni:
utACK b28917be36.
Tree-SHA512: 8c5835cb8b739355b71f7cb161b350ad8b038a00e6b1def36354ba228cea3dcb9883df3c9a8e79d7d0143241f6f054129fe90772b1b2579702db51237f9d66ff
56a9b847bb build: set build type and per-build-type flags as early as possible (Cory Fields)
f605f7a9c2 build: refactor: set debug definitions in main CMakeLists (Cory Fields)
Pull request description:
This ensures that most compiler tests are not run with the wrong build type's flags. The initial c++ checks are an exception to that because many internal CMake variables are unset until a language is selected, so it's problematic to change our build type before that.
The difference can be seen in `build/CMakeFiles/CMakeConfigureLog.yaml`. Before, `Debug` was used for many of the earlly checks. After this PR, it's only the first 2 checks.
ACKs for top commit:
hebasto:
ACK 56a9b847bb.
Tree-SHA512: 87947352d6d4fd08554515822cb13634ed3be33fcda2af817c22ef943b1d0856ceb39311ddc01b8221397528fdc09f630dc7e74fc92f5a4a073f09c4ae493596
76c090145e guix: remove test-security/symbol-check scripts (fanquake)
Pull request description:
These scripts are becoming more of nuisance, than a value-add; particularly since we've been building releases using Guix. Adding new (release bin) tests can be harder, because it requires constructing a failing test, which is becoming less easy, e.g trying to disable a feature or protection that has been built into the compiler/toolchain by default.
In the pre-Guix days, these were valuable to sanity-check the environment, because we were pulling that pre-built from Ubuntu, with little control. At this point, it's less clear what these scripts are (sanity) checking.
Note that these also weren't completely ported to CMake (#31698), see also #31715 which contains other fixes that would be needed for these test-tests, to accomodate future changes.
ACKs for top commit:
hebasto:
ACK 76c090145e.
theuni:
utACK 76c090145e
Tree-SHA512: 99b5e7c0645c6966a45b17f411b5bee61df23c64d8258cce0ad9cdea4c3af4d4db32ca5fd80d0df2a3a30ba873eb772cc0d5901c345ff7f0eea13fcb971443b4
The tarballs used for codesigning are more than merely unsigned, they
also contain scripts and other data for codesigning. Rename them to
codesigning.tar.gz to distinguish from tarballs containing actually just
the unsigned binaries.
Currently the manpages are installed, but that is a bug. An upcoming commit
will avoid installing manpages for targets that aren't configured, which
removes the "install" target for fuzz builds.
0f716f2889 qa: cover PROTOCOL_ERROR variant in PCP unit tests (Antoine Poinsot)
fc700bb47f test: Add tests for PCP and NATPMP implementations (laanwj)
caf9521033 net: Use mockable steady clock in PCP implementation (laanwj)
03648321ec util: Add mockable steady_clock (laanwj)
ab1d3ece02 net: Add optional length checking to CService::SetSockAddr (laanwj)
Pull request description:
Add a NodeSteadyClock, a steady_clock that can be mocked with millisecond precision. Use this in the PCP implementation.
Then add a mock for a simple scriptable UDP server,, which is used to test various code paths (including successful mappings, timeouts and errors) in the PCP and NATPMP implementations.
Includes "net: Add optional length checking to CService::SetSockAddr" from #31014 as a prerequisite.
ACKs for top commit:
darosior:
re-ACK 0f716f2889
i-am-yuvi:
Concept ACK 0f716f2889
achow101:
ACK 0f716f2889
Tree-SHA512: 6f91b24e6fe46a3fded7a13972efd77c98e6ef235f8898e4ae44068c5df32d1cdabb22cb66c351b338dc98cb2073b624e43607a28107f4999302bfbe7a138229
2ffea09820 build: disable bitcoin-node if daemon is not built (Sjors Provoost)
Pull request description:
When building for fuzzing with multiprocess enabled, we were still trying to build `bitcoin-node`. This PR fixes that, by applying a similar check as for `bitcoin-gui`.
Before:
```
cmake -B build -DBUILD_FOR_FUZZING=ON -DWITH_MULTIPROCESS=ON
...
Configure summary
=================
Executables:
bitcoind ............................ OFF
bitcoin-node (multiprocess) ......... ON
bitcoin-qt (GUI) .................... OFF
bitcoin-gui (GUI, multiprocess) ..... OFF
...
cmake --build build
...
[ 84%] Built target bitcoin-node
```
After:
```
bitcoin-node (multiprocess) ......... OFF
```
And no `bitcoin-node` target gets built (not to be confused with `bitcoin_node`).
ACKs for top commit:
hebasto:
ACK 2ffea09820.
ryanofsky:
Code review ACK 2ffea09820
laanwj:
Code review ACK 2ffea09820
Tree-SHA512: bdb0b62049f77929d5c084bf98a076e9933de91eb30853ed89edd23cc81b3d4aec4cd57c9a9e21cf1d6930885f8c408dda830db6884b4e326c7fb348f1fbab4c
Previously, -nodebug cleared all prior -debug configurations in the
command line while allowing subsequent debug options to be applied.
However, -debug=0 and -debug=none completely disabled debugging,
even for categories specified afterward.
This commit ensures consistency by making -debug=0 and -debug=none
behave like -nodebug: they now clear previously set debug configurations
but do not disable debugging for categories specified later.
Co-Authored-By: Ryan Ofsky <ryan@ofsky.org>
Our CMake toolchain for a Darwin cross build currently contains:
```bash
set(CMAKE_AR "/usr/bin/llvm-ar")
set(CMAKE_RANLIB "/usr/bin/llvm-ranlib")
set(CMAKE_STRIP "/usr/bin/llvm-strip")
set(CMAKE_OBJCOPY "arm64-apple-darwin-objcopy")
set(CMAKE_OBJDUMP "/usr/bin/llvm-objdump")
```
`objcopy` isn't currently used for the Darwin build (only for Linux and
splitting the debug symbols), but we shouldn't be producing a toolchain
file that refers to nonexistent tools.
