diff options
| author | Steve Vinoski <vinoski@ieee.org> | 2011-05-30 21:13:38 -0400 |
|---|---|---|
| committer | Tuncer Ayaz <tuncer.ayaz@gmail.com> | 2011-05-31 10:47:45 +0200 |
| commit | 0bbb2985f069c2c1785d33da6887598673cdaaac (patch) | |
| tree | f73bdd7f502f97f9588f91ac72b11bb119a2dbc2 /src/rebar_erlc_compiler.erl | |
| parent | aef6c70f598cf4cd1414bf5d4284e536f450a21a (diff) | |
Use external wordsize to get emulator build arch
Calling erlang:system_info(wordsize) yields the internal word size of
the Erlang emulator. But due to the halfword emulator, need to pass
{wordsize, external} instead to get the word size, or pointer size, as
seen by external code such as NIFs. The halfword emulator has 4 byte
internal words but 8 byte external words due to 64-bit compilation,
which means NIFs for the halfword emulator also have to be compiled
64-bit. But just passing wordsize is equivalent to passing {wordsize,
internal}, which does not indicate the pointer size for the halfword
emulator.
Older versions of Erlang do not support {wordsize, external}, though,
so continue to pass just wordsize for those versions.
Diffstat (limited to 'src/rebar_erlc_compiler.erl')
| -rw-r--r-- | src/rebar_erlc_compiler.erl | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/rebar_erlc_compiler.erl b/src/rebar_erlc_compiler.erl index 38dd198..efbdf09 100644 --- a/src/rebar_erlc_compiler.erl +++ b/src/rebar_erlc_compiler.erl @@ -52,7 +52,8 @@ %% %% OtpRelease = erlang:system_info(otp_release). %% SysArch = erlang:system_info(system_architecture). -%% Words = integer_to_list(8 * erlang:system_info(wordsize)). +%% Words = integer_to_list(8 * +%% erlang:system_info({wordsize, external})). %% %% E.g. to define HAVE_SENDFILE only on systems with %% sendfile(), to define BACKLOG on Linux/FreeBSD as 128, |