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| author | Mike Sperber <[email protected]> | 2012-03-22 18:00:31 +0100 |
|---|---|---|
| committer | Mike Sperber <[email protected]> | 2012-03-23 09:15:19 +0100 |
| commit | 933e701dac1936c6f15c765b5687fbc623464ec7 (patch) | |
| tree | 95bef4a51a14f512c23348e39cbfb336bc22475b /xcomp/erl-xcomp.conf.template | |
| parent | 3087769515ea9bfc75f7d7b8897bc897c7f13931 (diff) | |
| download | otp-933e701dac1936c6f15c765b5687fbc623464ec7.tar.gz otp-933e701dac1936c6f15c765b5687fbc623464ec7.tar.bz2 otp-933e701dac1936c6f15c765b5687fbc623464ec7.zip | |
Unbreak floating point on middle-endian machines.
On some ARMs (and maybe other platforms), doubles are stored with the
the two 32-bit words reversed with respect to more common
architectures.
The symptom is this:
> io_lib:write(1.0).
"0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005299808824"
Detect that and account for it when decoding floats.
Diffstat (limited to 'xcomp/erl-xcomp.conf.template')
| -rw-r--r-- | xcomp/erl-xcomp.conf.template | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/xcomp/erl-xcomp.conf.template b/xcomp/erl-xcomp.conf.template index eb331ffe92..c215f0fb13 100644 --- a/xcomp/erl-xcomp.conf.template +++ b/xcomp/erl-xcomp.conf.template @@ -187,6 +187,15 @@ # value is used, `configure' will try to figure this out automatically. #erl_xcomp_bigendian= +# * `erl_xcomp_double_middle` - `yes|no`. No default. If `yes`, the +# target system must have doubles in "middle-endian" format. If +# `no`, it has "regular" endianness. This can often be automatically +# detected, but not always. If not automatically detected, +# `configure` will fail unless this variable is set. Since no +# default value is used, `configure` will try to figure this out +# automatically. +#erl_xcomp_double_middle_endian + # * `erl_xcomp_clock_gettime_cpu_time' - `yes|no'. Defaults to `no'. If `yes', # the target system must have a working `clock_gettime()' implementation # that can be used for retrieving process CPU time. |