This function is missing on some platforms:
FreeBSD 5.2.1, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, HP-UX 11, IRIX 6.5, Solaris 9, Cygwin, Interix 3.5.
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+This function is only defined as a macro with arguments on some platforms:
+MSVC 9.
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This function is not declared on some platforms:
-MacOS X 10.3.
+Mac OS X 10.3.
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This function does not work on finite numbers on some platforms:
-MacOS X 10.4/PowerPC, AIX 5.1, MSVC 9, BeOS.
+Mac OS X 10.4/PowerPC, AIX 5.1, MSVC 9, BeOS.
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This function does not work on denormalized numbers on some platforms:
-MacOS X 10.5/i386.
+Mac OS X 10.5/i386.
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This function does not work on infinite numbers on some platforms:
IRIX 6.5, mingw, MSVC 9.