ceilf-ieee: Work around bug on AIX 7.1.

[pspp] / ChangeLog

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+2011-06-19  Bruno Haible  <bruno@clisp.org>
+
+       ceilf-ieee: Work around bug on AIX 7.1.
+       * m4/ceilf.m4 (gl_FUNC_CEILF): Test also the sign of ceilf (-0.3f).
+       * doc/posix-functions/ceilf.texi: Mention the AIX 7.1 problem.
+
 2011-06-19  Bruno Haible  <bruno@clisp.org>
 
        ceil-ieee: Work around bug on AIX 7.1.