Re: [Sdcc-user] problem with "const char"

[Maarten B. <sou...@ds...>]

Roelof,

You should never put a definition in a header file, only declarations. Go
back to your C book and look up the word extern.

It's also recommended to put function prototypes for functions you use in
one C file but define in another in a header file. Include this header in
both C files.

Maarten

> Hi all,
>
> The following is a problem I do not understand. When I put
> a line with const char *soft..... in a global header file
> it is ok. But when this line is in the "main" header file
> there are errors reported by sdcc.
> See below. The warnings are a totally different issue which
> I have to look into.
>
> And offcourse if someone is kind enough to look at this or
> my problem, here are the stripped sources :
>
> http://www.itholland.nl/download/error-20060801.tar
>
> I took everything out that is not contributing to the error.
> One of the const char lines in either fout-global.h or
> fout.h should be enabled at the time.
>
> The compiler is from today, an older one that I used previously
> and also generates this error is dated 18 July. I use the snapshots.
> Running on Linux/Ubuntu 5.04
>
> Thanks in advance,
> roelof
>
>
>
> roelofh@baywatch:/media/itholland/tek/meetlijn/oud/CAN/591-can/firmware=
/c-test$
> make -f makefout
> sdcc -c -mmcs51 --model-small --code-size 0x7000 --xram-size 0x1000
> --xram-loc 0x7000 --iram-size 0xff fout-i2c.c
> sdcc -c -mmcs51 --model-small --code-size 0x7000 --xram-size 0x1000
> --xram-loc 0x7000 --iram-size 0xff fout-util.c
> sdcc -c -mmcs51 --model-small --code-size 0x7000 --xram-size 0x1000
> --xram-loc 0x7000 --iram-size 0xff fout.c
> fout.c:19: warning 112: function 'CpuIdle' implicit declaration
> fout.c:19: warning 84: 'auto' variable 'CpuIdle' may be used before
> initialization
> fout.c:19: warning 84: 'auto' variable 'CpuIdle' may be used before
> initialization
> sdcc --code-size 0x7000 --xram-size 0x1000 --xram-loc 0x7000 --iram-siz=
e
> 0xff fout.rel fout-i2c.rel fout-util.rel
> Multiple definition of _i2cstatus
> make: *** [fout] Error 1
> roelofh@baywatch:/media/itholland/tek/meetlijn/oud/CAN/591-can/firmware=
/c-test$
> sdcc -v
> SDCC : mcs51/xa51 2.6.1 #4314 (Aug  1 2006) (UNIX)