+2012-04-02 Bruno Haible <bruno@clisp.org>
+
+ logb: Provide replacement and workarounds.
+ * lib/math.in.h (logb): Ensure declaration. Replace if REPLACE_LOGB
+ is 1.
+ * lib/logb.c: New file.
+ * m4/logb.m4 (gl_FUNC_LOGB_WORKS): New macro.
+ (gl_FUNC_LOGB): Invoke it. Set HAVE_LOGB, REPLACE_LOGB.
+ * m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize REPLACE_LOGB.
+ * modules/math (Makefile.am): Substitute REPLACE_LOGB.
+ * modules/logb (Files): Add lib/logb.c.
+ (Depends-on): Add isfinite, frexp, isnand.
+ (configure.ac): Compile the replacement code logb.c if needed.
+ * tests/test-math-c++.cc: Check the declaration of logb.
+ * doc/posix-functions/logb.texi: Mention the replacement and the bug
+ with subnormal numbers.
+
+2012-04-02 Bruno Haible <bruno@clisp.org>
+
+ log10* tests: Speed up.
+ * tests/test-log10.h (test_function): Reduce amount of random numbers
+ to test.
+