On Wed, 9 Apr 2008, Eric Blake wrote:
long double is not an extension. Did you mistake it with long long?
Indeed. A closer look at C89 requires 'long double'. Therefore,
AC_TYPE_LONG_DOUBLE should always succeed.
But AC_C_LONG_DOUBLE should report failure if 'long double' does not
support a larger range than 'double' due to this documentation:
"If the C compiler supports a working long double type with more
range or precision than the double type, define HAVE_LONG_DOUBLE."
Based on the description, it seems that AC_TYPE_LONG_DOUBLE_WIDER is
the new name for AC_C_LONG_DOUBLE but if it is used, then source code
modifications are required.
Bob
======================================
Bob Friesenhahn
bfriesen@xxxxxxxxxxxxxxxxxxx, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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