musl vs posix api

commit

commit 405ce58dcf59ecfb3e245fed0b96b1f35fbeaec1
Date: Fri Mar 2 22:35:37 2012 -0500

fix nan/infinity macros in math.h, etc.

the previous version not only failed to work in c++, but also failed
to produce constant expressions, making the macros useless as
initializers for objects of static storage duration.

gcc 3.3 and later have builtins for these, which sadly seem to be the
most "portable" solution. the alternative definitions produce
exceptions (for NAN) and compiler warnings (for INFINITY) on newer
versions of gcc.

legend

• status: musl implementation status summary
  • (empty) - implemented
  • nosym - prototype found in include files (see decl) but not in libc.a (see sym)
  • nodecl - symbol is in libc.a but not declared in a public header
  • missing - neither in include files (see decl) nor in libc.a (see sym)
• sym: external symbol kind as found by `nm libc.a` (symbol kind only reported once)
  • C - symbol is common (uninitialized data)
  • D - symbol is in the initialized data section
  • R - symbol is in the read only data section
  • T - symbol is in the text section
  • V - weak object
  • W - weak symbol
• decl: kind of declaration as found by `ctags -R include` (every occurance is reported)
  • d - macro definition
  • p - function prototype
  • x - external and forward variable declaration

(STREAMS and posix_trace* apis are excluded)

table