Re: building the cross compiler does not find unistd.h and stdlib.h

[Joćo Cadamuro Junior <cadamuro at lit dot cpdtt dot cefetpr dot br>]

>   Hi
>
>    I am trying to build a cross compiler on an ultra-sparc running redhat
> 6.2, for the i686 platform running linux as well.   I am using gcc-2.95.2,
> binutils-2.10.0 and glibc-2.1.3.  I am not having luck building
> gcc-2.95.2.  The build of gcc-2.95.2 can not find unistd.h and stdlib.h
>
> Notes on the configuration:
>
> The cross build process works well for binutils-2.10.0.  I used the
> configuration parameters
>
> ./binutils-2.10/configure --target=i686-linux --prefix=/cross/i686 -v
>
> In a seperate directory, During the build of gcc-295.2
>
> ./gcc-2.95.2/configure --target=i686-linux --prefix=/cross/i686
> --with-headers=../glibc-2.13/include -v
>
> Here is the output of the make all process for gcc-2.95.2...
>
> /home/douglas/cross/buildgcc/gcc/xgcc -B/home/douglas/cross/buildgcc/gcc/
> -B/cross/i686/i686-linux/bin/ -I/cross/i686/i686-linux/include -O2
> -DCROSS_COMPILE -DIN_GCC     -g -O2 -I./include  -fPIC -g1  -DIN_LIBGCC2
> -D__GCC_FLOAT_NOT_NEEDED   -I. -I../../gcc-2.95.2/gcc
> -I../../gcc-2.95.2/gcc/config -I../../gcc-2.95.2/gcc/../include -c
> -DL${name} \
>        ../../gcc-2.95.2/gcc/libgcc2.c -o ${name}.o; \
>   if [ $? -eq 0 ] ; then true; else exit 1; fi; \
>   i686-linux-ar rc tmplibgcc2.a ${name}.o; \
>  rm -f ${name}.o; \
>  done
>  _muldi3
> In file included from ../../gcc-2.95.2/gcc/libgcc2.c:41:
> /cross/i686/lib/gcc-lib/i686-linux/2.95.2/../../../../i686-linux/sys-include/stdlib.h:7: stdlib/stdlib.h: No such file or directory
> In file included from ../../gcc-2.95.2/gcc/libgcc2.c:42:
> /cross/i686/lib/gcc-lib/i686-linux/2.95.2/../../../../i686-linux/sys-include/unistd.h:2: posix/unistd.h: No such file or directory
>  make[1]: *** [libgcc2.a] Error 1
>  make[1]: Leaving directory `/home/douglas/cross/buildgcc/gcc'
>  make: *** [all-gcc] Error 2
>
>
> In the above process I have also used newlib-1.8.2/newlib/include as well.
>

Dear Douglas,

I had a similar problem when building my cross compiler (host cygwin and taget powerpc-eabi) using newlib 1.8.2.
To solve the problem I searched for a tip in the mail archives, and I found the following: (I don't remember who owns the credit...
sorry)

The problem is solved making two simbolic links inside <gcc-src-dir>/gcc-2.95.2 directory, pointing to newlib directory, as follow:

$ cd <gcc-src-dir>/gcc-2.95.2
$ ln -s <newlib-src-dir>/newlib-1.8.2/newlib newlib
$ ln -s <newlib-src-dir>/newlib-1.8.2/libgloss libgloss

I use this tip and I configure the cross compiler in this manner:

$ cd <gcc-build-dir>
$ <gcc-src-dir>/gcc-2.95.2/configure --target=powerpc-eabi --prefix=<my-prefix> --with-newlib

At the end of configure, my command

$ make all install

was ended successfully.


Hope this can help you...


Joćo Cadamuro Junior
LIT / CPDTT / CEFET-PR


>
>
>  - Douglas
>
> ------
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