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diff lib/math.in.h @ 16678:2f6973f75a06

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New module 'log2f'. * lib/math.in.h (log2f): New declaration. * lib/log2f.c: New file. * m4/log2f.m4: New file. * m4/math_h.m4 (gl_MATH_H): Test whether log2f is declared. (gl_MATH_H_DEFAULTS): Initialize GNULIB_LOG2F, HAVE_DECL_LOG2F, REPLACE_LOG2F. * modules/math (Makefile.am): Substitute GNULIB_LOG2F, HAVE_DECL_LOG2F, REPLACE_LOG2F. * modules/log2f: New file. * tests/test-math-c++.cc: Check the declaration of log2f. * doc/posix-functions/log2f.texi: Mention the new module and the IRIX and OSF/1 and Cygwin problems.
author Bruno Haible <bruno@clisp.org>
date Sun, 11 Mar 2012 17:57:12 +0100 (2012-03-11)
parents e9598f93f892
children fcdfd8bdad38
line wrap: on
line diff
--- a/lib/math.in.h
+++ b/lib/math.in.h
@@ -1291,6 +1291,30 @@
 #endif
 
 
+#if @GNULIB_LOG2F@
+# if @REPLACE_LOG2F@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef log2f
+#   define log2f rpl_log2f
+#  endif
+_GL_FUNCDECL_RPL (log2f, float, (float x));
+_GL_CXXALIAS_RPL (log2f, float, (float x));
+# else
+#  if !@HAVE_DECL_LOG2F@
+#   undef log2f
+_GL_FUNCDECL_SYS (log2f, float, (float x));
+#  endif
+_GL_CXXALIAS_SYS (log2f, float, (float x));
+# endif
+_GL_CXXALIASWARN (log2f);
+#elif defined GNULIB_POSIXCHECK
+# undef log2f
+# if HAVE_RAW_DECL_LOG2F
+_GL_WARN_ON_USE (log2f, "log2f is unportable - "
+                 "use gnulib module log2f for portability");
+# endif
+#endif
+
 #if @GNULIB_LOG2@
 # if @REPLACE_LOG2@
 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)