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digitalmars.D.bugs - [Issue 8548] New: relocation R_X86_64_32 against can not be used when making a shared object

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           Summary: relocation R_X86_64_32 against can not be used when
                    making a shared object
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: wbrana gmail.com



$ ./dmd hello.d 
/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.2/../../../../x86_64-pc-linux-gnu/bin/ld:
hello.o: relocation R_X86_64_32 against `.data' can not be used when making a
shared object; recompile with -fPIC
hello.o: could not read symbols: Bad value
collect2: error: ld returned 1 exit status
--- errorlevel 1

$ ./dmd -fPIC hello.d 
/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.2/../../../../x86_64-pc-linux-gnu/bin/ld:
./../lib64/libphobos2.a(object__c_58c.o): relocation R_X86_64_32 against
`_D10TypeInfo_m6__initZ' can not be used when making a shared object; recompile
with -fPIC
./../lib64/libphobos2.a: could not read symbols: Bad value
collect2: error: ld returned 1 exit status
--- errorlevel 1

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next sibling parent d-bugmail puremagic.com writes:
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Maxim Fomin <maxim maxim-fomin.ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |maxim maxim-fomin.ru



---
Which version of dmd are you using and what is in hello.d?

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dmd.2.060.zip
dmd2/linux/bin64/dmd

import std.stdio;

void main(string[] args)
{
    writeln("hello world");
    writefln("args.length = %d", args.length);

    foreach (index, arg; args)
    {
        writefln("args[%d] = '%s'", index, arg);
    }
}

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It seems dmd is incompatible with Gentoo Hardened gcc.

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following command fails also with non-hardened gcc

 ./dmd -shared -fPIC hello.d 
/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.2-pre9999/../../../../x86_64-pc-linux-gnu/bin/ld:
./../lib64/libphobos2.a(object__c_58c.o): relocation R_X86_64_32 against
`_D10TypeInfo_m6__initZ' can not be used when making a shared object; recompile
with -fPIC
./../lib64/libphobos2.a: could not read symbols: Bad value
collect2: error: ld returned 1 exit status
--- errorlevel 1

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---


 following command fails also with non-hardened gcc
 
  ./dmd -shared -fPIC hello.d 
 /usr/lib/gcc/x86_64-pc-linux-gnu/4.7.2-pre9999/../../../../x86_64-pc-linux-gnu/bin/ld:
 ./../lib64/libphobos2.a(object__c_58c.o): relocation R_X86_64_32 against
 `_D10TypeInfo_m6__initZ' can not be used when making a shared object; recompile
 with -fPIC
 ./../lib64/libphobos2.a: could not read symbols: Bad value
 collect2: error: ld returned 1 exit status
 --- errorlevel 1


Libraries may be built in two steps 
(currently I don't know better solution):

dmd hello.d -fPIC -c
gcc --shared hello.o -o ...

if there is really need to make a library with main function.
Additionally, when linking object files from manually compiled sources, 
core modules have to be linked with phobos2.a, librt.so, libpthread.so.

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