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Move include/math.h to include/nuttx/math.h

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4568 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
2012-04-07 14:08:37 +00:00
parent 330b89ca0e
commit 51b62505e6
4 changed files with 200 additions and 82 deletions
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README.txt
+17 -7
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@@ -128,8 +128,8 @@ Notes about Header Files:
Header Files Provided by Your Toolchain.
Certain header files, such as setjmp.h and varargs.h, may still be
needed from your toolchain and your compiler may not, however, be able
Certain header files, such as setjmp.h, stdargs.h, and math.h, may still
be needed from your toolchain and your compiler may not, however, be able
to find these if you compile NuttX without using standard header file.
If that is the case, one solution is to copy those header file from
your toolchain into the NuttX include directory.
@@ -148,11 +148,21 @@ Notes about Header Files:
Even though you should not use a foreign C-Library, you may still need
to use other, external libraries with NuttX. In particular, you may
need to use the math library, libm.a. The math libary header file,
math.h, is a special case. A stub math.h header file is included at
nuttx/include/math.h. This stub header file can be used to "redirect"
the inclusion to an architecture-specific math.h header file. But, if
you need your toolchain's math.h header file, the simplest thing to do
is probably to just remove the nuttx/include/math.h header file.
math.h, is a special case. If you do nothing, the standard math.h
header file that is provided with your toolchain will be used.
If you have a custom, architecture specific math.h header file, then
that header file should be placed at arch/<cpu>/include/math.h. There
is a stub math.h header file located at include/nuttx/math.h. This stub
header file can be used to "redirect" the inclusion to an architecture-
specific math.h header file. If you add an architecture specific math.h
header file then you should also define CONFIG_ARCH_MATH_H=y in your
NuttX Configuration file. If CONFIG_ARCH_MATH_H is selected, then the
top-level Makefile will copy the stub math.h header file from
include/nuttx/matn.h to include/math.h where it will become the system
math.h header file. The stub math.h header file does nothing other
than to include that archicture-specific math.h header file as the
system math.h header file.
CONFIGURING NUTTX
^^^^^^^^^^^^^^^^^