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-rw-r--r--doc/build-openbsd.md72
1 files changed, 33 insertions, 39 deletions
diff --git a/doc/build-openbsd.md b/doc/build-openbsd.md
index cd1d217b47..0817821221 100644
--- a/doc/build-openbsd.md
+++ b/doc/build-openbsd.md
@@ -23,47 +23,31 @@ git clone https://github.com/bitcoin/bitcoin.git
See [dependencies.md](dependencies.md) for a complete overview.
-GCC
--------
-
-The default C++ compiler that comes with OpenBSD 6.2 is g++ 4.2.1. This version is old (from 2007), and is not able to compile the current version of Bitcoin Core because it has no C++11 support. We'll install a newer version of GCC:
-
-```bash
- pkg_add g++
- ```
-
- This compiler will not overwrite the system compiler, it will be installed as `egcc` and `eg++` in `/usr/local/bin`.
+**Important**: From OpenBSD 6.2 onwards a C++11-supporting clang compiler is
+part of the base image, and while building it is necessary to make sure that this
+compiler is used and not ancient g++ 4.2.1. This is done by appending
+`CC=cc CXX=c++` to configuration commands. Mixing different compilers
+within the same executable will result in linker errors.
### Building BerkeleyDB
-BerkeleyDB is only necessary for the wallet functionality. To skip this, pass `--disable-wallet` to `./configure`.
+BerkeleyDB is only necessary for the wallet functionality. To skip this, pass
+`--disable-wallet` to `./configure` and skip to the next section.
It is recommended to use Berkeley DB 4.8. You cannot use the BerkeleyDB library
from ports, for the same reason as boost above (g++/libstd++ incompatibility).
If you have to build it yourself, you can use [the installation script included
-in contrib/](contrib/install_db4.sh) like so
+in contrib/](/contrib/install_db4.sh) like so
```shell
-./contrib/install_db4.sh `pwd` CC=egcc CXX=eg++ CPP=ecpp
+./contrib/install_db4.sh `pwd` CC=cc CXX=c++
```
-from the root of the repository.
-
-### Resource limits
-
-The standard ulimit restrictions in OpenBSD are very strict:
-
- data(kbytes) 1572864
+from the root of the repository. Then set `BDB_PREFIX` for the next section:
-This, unfortunately, may no longer be enough to compile some `.cpp` files in the project,
-at least with GCC 4.9.4 (see issue [#6658](https://github.com/bitcoin/bitcoin/issues/6658)).
-If your user is in the `staff` group the limit can be raised with:
-
- ulimit -d 3000000
-
-The change will only affect the current shell and processes spawned by it. To
-make the change system-wide, change `datasize-cur` and `datasize-max` in
-`/etc/login.conf`, and reboot.
+```shell
+export BDB_PREFIX="$PWD/db4"
+```
### Building Bitcoin Core
@@ -79,13 +63,13 @@ Make sure `BDB_PREFIX` is set to the appropriate path from the above steps.
To configure with wallet:
```bash
-./configure --with-gui=no CC=egcc CXX=eg++ CPP=ecpp \
+./configure --with-gui=no CC=cc CXX=c++ \
BDB_LIBS="-L${BDB_PREFIX}/lib -ldb_cxx-4.8" BDB_CFLAGS="-I${BDB_PREFIX}/include"
```
To configure without wallet:
```bash
-./configure --disable-wallet --with-gui=no CC=egcc CXX=eg++ CPP=ecpp
+./configure --disable-wallet --with-gui=no CC=cc CXX=c++
```
Build and run the tests:
@@ -94,13 +78,23 @@ gmake # use -jX here for parallelism
gmake check
```
-Clang
-------------------------------
+Resource limits
+-------------------
-```bash
-pkg_add llvm
+If the build runs into out-of-memory errors, the instructions in this section
+might help.
+
+The standard ulimit restrictions in OpenBSD are very strict:
+
+ data(kbytes) 1572864
+
+This, unfortunately, in some cases not enough to compile some `.cpp` files in the project,
+(see issue [#6658](https://github.com/bitcoin/bitcoin/issues/6658)).
+If your user is in the `staff` group the limit can be raised with:
+
+ ulimit -d 3000000
+
+The change will only affect the current shell and processes spawned by it. To
+make the change system-wide, change `datasize-cur` and `datasize-max` in
+`/etc/login.conf`, and reboot.
-./configure --disable-wallet --with-gui=no CC=clang CXX=clang++
-gmake # use -jX here for parallelism
-gmake check
-```