strange -fPIC compilation error

[Charles Hixson via Digitalmars-d-learn]

On 10/30/2016 05:14 PM, Lodovico Giaretta via Digitalmars-d-learn wrote:
> On Monday, 31 October 2016 at 00:08:59 UTC, Charles Hixson wrote:
>> So now I removed the repository version of dmd and dub, downloaded 
>> DMD64 D Compiler v2.072.0-b2, used dkpg to install it, and appear to 
>> get the same errors.
>>
>> (Well, actually I removed the commenting out of the code, but it 
>> compiles and runs properly with ldc2.)
>
> I don't think it's a problem of DMD. This is due to your gcc 
> installation being hardened, that is, configured to produce PIE by 
> default. To produce PIE, the linker needs to be fed PIC, which DMD 
> does not produce by default. The -fPIC flags makes DMD produce PIC out 
> of your sources. The problem is, libphobos2.a (the static version of 
> Phobos) is not compiled with -fPIC, so even if your code is PIC, gcc 
> will complain. The workaround is to use -defaultlib=libphobos2.so to 
> dynamically link with the shared version of Phobos. Being it a shared 
> object, it does not give any problem with PIE.
>
> Looking on internet, I didn't find any clue about Debian shipping an 
> hardened gcc, but this is the only cause I can think of for the 
> behaviour you are experiencing.
>
Well, that certainly changed the error messages.  With
dmd -defaultlib=/usr/lib/x86_64-linux-gnu/libphobos2.so test.d
I get:
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1121): Error: found 
'nothrow' when expecting '{'
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1123): Error: 
mismatched number of curly brackets
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1124): Error: 
mismatched number of curly brackets
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1125): Error: 
mismatched number of curly brackets
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1126): Error: 
mismatched number of curly brackets
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1127): Error: 
mismatched number of curly brackets
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1128): Error: 
mismatched number of curly brackets
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1129): Error: 
mismatched number of curly brackets
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1133): Error: asm 
statements must end in ';'
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1136): Error: found 
'private' instead of statement
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1146): Error: no 
identifier for declarator add
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1149): Error: no 
identifier for declarator usDone
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1149): Error: 
Declaration expected, not ':'
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1157): Error: 
Declaration expected, not '('
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1159): Error: 
Declaration expected, not 'foreach'
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1159): Error: 
Declaration expected, not '0'
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1164): Error: no 
identifier for declarator __fhnd_info[fd]
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1164): Error: 
Declaration expected, not '='
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1165): Error: 
Declaration expected, not 'return'
/usr/include/dmd/druntime/import/core/stdc/stdio.d(1167): Error: 
unrecognized declaration
/usr/include/dmd/phobos/std/typecons.d(1124): Error: semicolon expected 
following function declaration