Re: [Tinycc-devel] [PATCH] preprocess all files from a command line with a -E switch

[Thomas Preud'homme]

Le samedi 27 décembre 2014, 16:19:04 Sergey Korshunoff a écrit :
> Don't drop a preprocessor defines when tcc going to preprocess a next
> file in the same pass like
>         tcc -E one.c two.c three.c -o combined.i
> 
> Currently tcc don't handle such case. The new behavior is better then
> the current one. After a patch it is possible to compile combined.i
> in case:
> 
> * include files are properly protected by
>         #ifndef MY_INCLUDE_H
>         #define MY_INCLUDE_H
>           extern void func();
>         #endif
> * there is no incompatible declarations for the same name in *.c
> 
> An archive for a test purpose is included

Sorry but I'm not sure I like this functionality. When gcc compiles several .c 
files they are compiled independently: macro are not kept accross files. Doing 
this only for -E flag would make it not very consistent. Also I don't like the 
shape of the patch: initialization of the preprocessing should be split out of 
the function but anyway that is not worth discussing further given previous 
point.

Best regards,

Thomas