Re: ./libgcc2.c:41: stdlib.h: No such file or directory

[Geir Frode Raanes <geirfrs at invalid dot ed dot ntnu dot no>]

On Mon, 13 Dec 1999, 戀上泉水.... wrote:

> 
> Hi All.
> 
> 	I'm making the cross-gcc for ARM with "gcc-2.95.2",and some
> 	errors came up.
> _muldi3
> ./libgcc2.c:41: stdlib.h: No such file or directory
> ./libgcc2.c:42: unistd.h: No such file or directory

The usual fix is to include the target OS system files
under the directory "$(prefix)/$(target)/include" or 
- if no such headerfiles exist - configure GCC with 
the "--enable-newlib" option. This also requires you
to softlink two of newlibs subdirectories into the
GCC root source directory to allow 'configure' to
find them and "xgcc -I./newlib" include them.

 [gcc-2.95.2]$ ln -s ../newlib-1.8.1/newlib/   newlib
 [gcc-2.95.2]$ ln -s ../newlib-1.8.1/libgloss/ libgloss


> In the file libgcc2.c ,the follows are line 39 to line 43
> 
> #ifndef inhibit_libc
> /* fixproto guarantees these system headers exist. */
> #include <stdlib.h>
> #include <unistd.h>
> #endif                                            
> 
> This error didn't happen with "gcc-2.8.1" because in the file
> libgcc2.c of gcc-2.8.1,these 5 lines DON'T EXIST.

You telling me we _had_ a LibC free implementation and now we don't?
Can someone tell me how _that_ came to be?

There are some options in the "$target.h" file that can be modified
to allow GCC to be built without floating point support in the form
of 'libgcc?.a' library. This is not what I want. Rather I want a
truly standalone soft floating point emulation. At least for the
usual embedded targets. For OS targets this is of no concern.
Unfortunately, I am not clever enough to fix this myself.


--
  ******************************************************
  Never ever underestimate the power of human stupidity.
  -Robert Anson Heinlein

		GeirFRS@invalid.and.so.forth
  ******************************************************
	


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