Re: Making gcc read from the standard input

[Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>]

Tathagato Rai Dastidar wrote:
> Hello,
>
> Is there a way I can make GCC read a C or C++ code from the standard 
> input instead of from a file?
>
> In my application software, I am generating some C code on the fly, 
> writing it to a file, then using GCC to compile it. Instead of that, I 
> want to invoke GCC through a pipe, and write the C code directly into 
> GCC, instead of writing it into a file and then calling GCC.
>
> Is this possible?

This is a question only for gcc-help.  Cross-posting gcc and gcc-help is 
almost always wrong.  :-) But yes, it is possible by adding "-x c" to 
the command line, so that the gcc driver knows which front-end to 
invoke.  In the case of "-E", in fact, GCC implicitly considers the 
language to be C (and invokes the C front-end) because the preprocessor 
is the same for all input languages; but for real compilation, you need 
to specify the language manually.

HTH,

Paolo