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Re: [Tinycc-devel] likner script parser - support relative/short file na
From: |
Thomas Preud'homme |
Subject: |
Re: [Tinycc-devel] likner script parser - support relative/short file names? |
Date: |
Wed, 4 Jan 2012 14:45:50 +0100 |
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KMail/1.13.7 (Linux/3.1.0-1-amd64; KDE/4.6.5; x86_64; ; ) |
Le lundi 19 septembre 2011 19:30:09, Thomas Preud'homme a écrit :
> Le lundi 19 septembre 2011 18:49:32, address@hidden a écrit :
> > Hello,
> >
> > I had to apply the following patch to be able to use my uclibc instance
> > which contains relative library file names in the libc.so linker script.
> >
> > It does not work otherwise, tcc complains about unrecognized file format.
> > (It worked however if the script contained only absolute file names.)
> >
> > The patch:
> > ----
> > --- tccelf.c.ori2 2011-09-19 13:20:59.000000000 +0200
> > +++ tccelf.c 2011-09-19 14:33:30.000000000 +0200
> > @@ -3005,7 +3005,7 @@
> >
> > } else {
> >
> > /* TODO: Implement AS_NEEDED support. Ignore it for now */
> > if (!as_needed) {
> >
> > - ret = ld_add_file(s1, filename, libname);
> > + ret = tcc_add_dll(s1, filename, 0);
> >
> > if (ret)
> >
> > goto lib_parse_error;
> >
> > if (group) {
> >
> > ----
> >
> > The linker script in question was
> > ..../lib/libc.so:
> > ----
> > /* GNU ld script
> >
> > * Use the shared library, but some functions are only in
> > * the static library, so try that secondarily. */
> >
> > OUTPUT_FORMAT("elf32-i386", "elf32-i386",
> >
> > "elf32-i386")
> >
> > GROUP ( libc.so.0 uclibc_nonshared.a AS_NEEDED ( ld-uClibc.so.0 ) )
> > ----
>
> Good catch.
>
> > Hope this change makes sense.
>
> It does but it's incomplete. You should tcc_add_dll after
> tcc_add_file_internal because each file must be searched first in current
> directory and then in the library search path according to [1]. Hence you
> should modify ld_add_file to use tcc_add_dll instead of if
> (filename_to_libname()) tcc_add_library. Hence you can also remove
> filename_to_libname function altogether.
I've just pushed code to fix this first part. Will deal with the other bits
later.
>
> I've just noticed the function should be a bit more constraint to reject
> files like AS_NEEDED(AS_NEEDED(…)). Also libname_to_filename should always
> return .a for non PE systems, still according to [1]. But don't bother to
> do this part, I'll do it myself one day.
>
> [1] http://www.delorie.com/gnu/docs/binutils/ld_12.html
>
> > Regards,
> > Rune
>
> Thanks a lot.
>
> Thomas Preud'homme
Best regards,
Thomas Preud'homme
>
> > _______________________________________________
> > Tinycc-devel mailing list
> > address@hidden
> > https://lists.nongnu.org/mailman/listinfo/tinycc-devel
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