Re: [Tinycc-devel] Error: File crti.o/crt1.o Not Found and No Function Renaming

[Cayce Pollard]

On Sun, Sep 15, 2013 at 2:03 PM, Thomas Preud'homme <address@hidden> wrote:

Le vendredi 13 septembre 2013 18:43:14 Cayce Pollard a écrit :

> I'm once again testing a build of tcc on my device by compiling SCM.
> Determined to get this working
>
> /home/kbox/devel/scm $ tcc -vv scm.c
> tcc version 0.9.26 (ARM Linux)
> tcc: error: file 'crt1.o' not found
> tcc: error: file 'crti.o' not found
> -> scm.c
> -> /usr/include/signal.h
> ->  /usr/include/sys/cdefs.h
> ->   /usr/include/sys/cdefs_elf.h
> In file included from scm.c:24:
> In file included from /usr/include/signal.h:31:
> /usr/include/sys/cdefs.h:252: error: #error "No function renaming possible"
> /home/kbox/devel/scm $
>
> 1) There are crt* files on my device, but they are not crt1.o or crti.o.

What are they?

Here's the list of crt* files in the sysroot/usr/lib of the android NDK:

crtbegin_dynamic.o  crtbegin_static.o  crtend_so.o crtbegin_so.o   crtend_android.o 

> When building tcc for my device, I specified the crt location and included
> crtbegin_dynamic and crtend_android to --extra-ldflags during configure.
> Why is tcc complaining about crti.o and crt1.o?

--extra-ldflags is to set the LDFLAGS to be used during compilation of tcc. It
doesn't affect the behavior of tcc but the behavior of the compiler compiling
tcc. What you seem to want here is that tcc link the extra files
crtbegin_dynamic and crtent_android to each program generated.

Anyway, crti.o and crt1.o are hardcoded in tcc so you'd have to change the
code to look for files named differently.

>
> 2) Is there a way to indicate to cdefs.h that compiler implements C99
> without editing cdefs.h?

It should already be done. See function tcc_new in libtcc.c:

    /* standard defines */
    tcc_define_symbol(s, "__STDC__", NULL);
    tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
    tcc_define_symbol(s, "__STDC_HOSTED__", NULL);

If you could paste the relevant bits (around line 252) of file
/usr/include/sys/cdefs.h we could help you more efficiently.

Sorry about that.  Here's the relevant lines  in cdefs.h  

245 #if !defined(_STANDALONE) && !defined(_KERNEL)

    246 #ifdef __GNUC__

    247 #define __RENAME(x)     ___RENAME(x)

    248 #else

    249 #ifdef __lint__

    250 #define __RENAME(x)     __symbolrename(x)

    251 #else

    252 #error "No function renaming possible"

    253 #endif /* __lint__ */

    254 #endif /* __GNUC__ */

    255 #else /* _STANDALONE || _KERNEL */

    256 #define __RENAME(x)     no renaming in kernel or standalone environment

    257 #endif

    258 

There's also this bit that may be relevant:

224 /*

    225  * C99 defines __func__ predefined identifier, which was made available

    226  * in GCC 2.95.

    227  */

    228 #if !defined(__STDC_VERSION__) || !(__STDC_VERSION__ >= 199901L)

    229 #if __GNUC_PREREQ__(2, 6)

    230 #define __func__        __PRETTY_FUNCTION__

    231 #elif __GNUC_PREREQ__(2, 4)

    232 #define __func__        __FUNCTION__

    233 #else

    234 #define __func__        ""

    235 #endif

    236 #endif /* !(__STDC_VERSION__ >= 199901L) */

    237 

    238 #if defined(_KERNEL)

    239 #if defined(NO_KERNEL_RCSIDS)

    240 #undef __KERNEL_RCSID

    241 #define __KERNEL_RCSID(_n, _s)          /* nothing */

    242 #endif /* NO_KERNEL_RCSIDS */

    243 #endif /* _KERNEL */

    244 

Let me know if you need more info.  Thanks again.