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Re: [Tinycc-devel] can't build mob branch on x86 64

From: Thomas Preud'homme
Subject: Re: [Tinycc-devel] can't build mob branch on x86 64
Date: Fri, 4 Feb 2011 20:45:51 +0100
User-agent: KMail/1.13.5 (Linux/2.6.32-5-amd64; KDE/4.4.5; x86_64; ; )

Le vendredi 04 février 2011 20:23:13, grischka a écrit :
> tcctok.h:
>  > #if defined __i386__ || defined __x86_64__
>  > 
>  >      DEF(TOK_alloca, "alloca")
>  > 
>  > #endif
> Not all compilers do define __i386__ or __x86_64__, e.g. MSVC
> does not.  (It defines _X86_ and _AMD64_).
> Also, the host platform doesn't matter anyway, the question
> here is whether alloca is defined for the target platform.
Yes but how to detect that alloca is available to define TOK_alloca?
> In test/tcctest.c:
>  > void alloca_test()
>  > {
>  > #ifdef TOK_alloca
> tcctest.c is not part of the tcc source code and hence never
> defines "TOK_alloca" (and ahould not).
So same problem, previously only __i386__ and __x86_64__ were tested. Do you 
have an advice for that? I guess for the test we could detect at runtime 
thanks to dlopen/dlsym but it seems like overkill solution.
> Anyway, nice work.  I guess this could be a good headline for next
> release: "tcc 0.9.26 now supports C99 type VLAs." ;)
Thanks, take it as nice compliment from you but when I see the size of the 
patch I know it's really nothing. Anyway it has several times been asked, and 
I wasn't happy with the solution we used in Debian. It was taken from the 
forge BTS and it was basically rewriting the source code and handled only one 
level of vla.

By the way, there is a couple of bugs that could be closed in the savannah 
BTS, namely #30457 [1] , #23851 [2], #13213 [3]. Some other bugs might also be 
closed as well I think, like #15366 [4].
> --- grischka

Best regards,

Thomas Preud'homme

[1] http://savannah.nongnu.org/bugs/?30457
[2] http://savannah.nongnu.org/bugs/?23851
[3] http://savannah.nongnu.org/bugs/?13213
[4] http://savannah.nongnu.org/bugs/?15366

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