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| author | Rickard Green <[email protected]> | 2013-07-08 17:20:21 +0200 |
|---|---|---|
| committer | Rickard Green <[email protected]> | 2013-07-09 14:40:14 +0200 |
| commit | 876d39cd86446ba0fe79ad20f1d261e5d85d659b (patch) | |
| tree | fc697d4776df8d6bf25c3f086c07ca8fbfbed977 /HOWTO | |
| parent | b3b0c44ca3f1b87c719f782f09dd0331dbb1a351 (diff) | |
| download | otp-876d39cd86446ba0fe79ad20f1d261e5d85d659b.tar.gz otp-876d39cd86446ba0fe79ad20f1d261e5d85d659b.tar.bz2 otp-876d39cd86446ba0fe79ad20f1d261e5d85d659b.zip | |
Refuse to build SMP runtime by default without native atomics
Build with fallback can be enabled by passing the `configure` command
line argument `--disable-smp-require-native-atomics`
Diffstat (limited to 'HOWTO')
| -rw-r--r-- | HOWTO/INSTALL.md | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/HOWTO/INSTALL.md b/HOWTO/INSTALL.md index 8051bc4393..fa1b9d2e89 100644 --- a/HOWTO/INSTALL.md +++ b/HOWTO/INSTALL.md @@ -288,6 +288,14 @@ Some of the available `configure` options are: implementation available, you typically want to try using the `libatomic_ops` library. It can be downloaded from <http://www.hpl.hp.com/research/linux/atomic_ops/>. +* `--disable-smp-require-native-atomics` - By default `configure` will + fail if an SMP runtime system is about to be built, and no implementation + for native atomic memory accesses can be found. If this happens, you are + encouraged to find a native atomic implementation that can be used, e.g., + using `libatomic_ops`, but by passing `--disable-smp-require-native-atomics` + you can build using a fallback implementation based on mutexes or spinlocks. + Performance of the SMP runtime system will however suffer immensely without + an implementation for native atomic memory accesses. If you or your system has special requirements please read the `Makefile` for additional configuration information. |