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authorMike Sperber <[email protected]>2012-03-22 18:00:31 +0100
committerMike Sperber <[email protected]>2012-03-23 09:15:19 +0100
commit933e701dac1936c6f15c765b5687fbc623464ec7 (patch)
tree95bef4a51a14f512c23348e39cbfb336bc22475b /xcomp/erl-xcomp.conf.template
parent3087769515ea9bfc75f7d7b8897bc897c7f13931 (diff)
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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.template9
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.