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changeset 8236:ae817fef53c8

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Correct handling of ARM when cross-compiling.
author Bruno Haible <bruno@clisp.org>
date Sun, 25 Feb 2007 01:57:58 +0000
parents 9f0b58cde63c
children c7cc3f95c8a7
files m4/isnan.m4
diffstat 1 files changed, 6 insertions(+), 3 deletions(-) [+]
line wrap: on
line diff
--- a/m4/isnan.m4
+++ b/m4/isnan.m4
@@ -92,14 +92,17 @@
         [gl_cv_cc_double_expbit0=`cat conftest.out`],
         [gl_cv_cc_double_expbit0="unknown"],
         [
-          dnl On ARM, integer types are stored in little-endian byte order,
-          dnl but floats are stored in big-endian word order.
+          dnl On ARM, there are two 'double' floating-point formats, used by
+          dnl different sets of instructions: The older FPA instructions assume
+          dnl that they are stored in big-endian word order, while the words
+          dnl (like integer types) are stored in little-endian byte order.
+          dnl The newer VFP instructions assume little-endian order consistenly.
           AC_EGREP_CPP([mixed_endianness], [
 #if defined arm || defined __arm || defined __arm__
   mixed_endianness
 #endif
             ],
-            [gl_cv_cc_double_expbit0="word 0 bit 20"],
+            [gl_cv_cc_double_expbit0="unknown"],
             [
               AC_C_BIGENDIAN(
                 [gl_cv_cc_double_expbit0="word 0 bit 20"],