I just ported my Java application to D, got it to compile, but not to link.

I'm using Windows 10 64 bit, DMD 2.088.0 , Visual D 0.50.1.  This would be a C/C++ project in Visual Studio with only D code.

With my first attempt, I'm missing 65 externals, 328 errors.

I added these two files

ucrt.lib
vcruntime.lib

to the Additional Dependencies in the linker property pages and have my missing external count down to 6, 70 errors.

I'm missing the following 6 symbols:

_fltused _tls_index _tls_used localtime tzset mainCRTStartup

What other libs would I need to add to the linker's additional dependencies?

PS:  Here are the actual linker errors:

1>phobos64.lib(gc_23c0_122.obj) : error LNK2001: unresolved external symbol _fltused
1>phobos64.lib(ti_float_2680_3f3.obj) : error LNK2001: unresolved external symbol _fltused
1>phobos64.lib(hash_d99_76c.obj) : error LNK2001: unresolved external symbol _fltused
1>phobos64.lib(typeinfo_2629_49b.obj) : error LNK2001: unresolved external symbol _fltused
1>phobos64.lib(demangle_c1d_79b.obj) : error LNK2001: unresolved external symbol _fltused
1>phobos64.lib(parseoptions_dbf_7cf.obj) : error LNK2001: unresolved external symbol _fltused
1>phobos64.lib(gc_23bb_583.obj) : error LNK2001: unresolved external symbol _fltused
1>dcompile_ACME.obj : error LNK2001: unresolved external symbol _fltused
1>phobos64.lib(ti_double_267f_3f1.obj) : error LNK2001: unresolved external symbol _fltused
1>phobos64.lib(hash_d90_7d1.obj) : error LNK2001: unresolved external symbol _fltused
1>phobos64.lib(hash_da7_5fe.obj) : error LNK2001: unresolved external symbol _fltused
1>phobos64.lib(thread_cae_681.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(thread_cb1_5f2.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23e3_142b.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(lifetime_2517_713.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(exception_c7a_fff.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(thread_cac_6f2.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23df_13c3.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23e0_687.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23e1_687.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23e2_e95.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23db_12f9.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23dc_1319.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23dd_12df.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23de_12a7.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23d5_2117.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23d7_1ed1.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23d8_13ee.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23d9_114b.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23d1_10bd.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23d2_12c9.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23d3_12c9.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23d4_1e85.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23bb_583.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23c0_122.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23cf_e95.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(gc_23d0_e95.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(advapi32_3e23_45c.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(tlsgc_25a3_1b4.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(advapi32_3e22_45a.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(sections_win64_2590_507.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(deh_win64_posix_24d8_6ee.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(thread_cd3_864.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(thread_cbe_6a3.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(registry_3d3f_4ba.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(exception_c79_d6c.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(exception_c77_1702.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(thread_c9d_48b.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(thread_c9a_713.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(profilegc.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(thread_c9c_258.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(dll.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(thread_cc0_1e8.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(exception_c78_b74.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(lifetime_2515_4a3.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(profilegc_2587_424.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(concurrency_2ec9_3e4.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(lifetime_251a_7db.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(lifetime_2537_6c8.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(exception_c76_133e.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(lifetime.obj) : error LNK2001: unresolved external symbol _tls_index
1>dcompile_ACME.obj : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(deh_win64_posix_24dd_3b9.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(lifetime_2534_7cc.obj) : error LNK2001: unresolved external symbol _tls_index
1>phobos64.lib(lifetime_2533_763.obj) : error LNK2001: unresolved external symbol _tls_index
1>LINK : error LNK2001: unresolved external symbol mainCRTStartup
1>phobos64.lib(timezone_3710_37a.obj) : error LNK2019: unresolved external symbol localtime referenced in function "const nothrow @trusted bool std.datetime.timezone.LocalTime.dstInEffect(long)" (_D3std8datetime8timezone9LocalTime11dstInEffectMxFNbNelZb)
1>phobos64.lib(timezone_3710_37a.obj) : error LNK2019: unresolved external symbol tzset referenced in function "nothrow @nogc @safe bool std.datetime.timezone.LocalTime.singleton().__lambda3()" (_D3std8datetime8timezone9LocalTime9singletonFNeZ9__lambda3FNbNiNfZb)
1>phobos64.lib(sections_win64_2590_507.obj) : error LNK2019: unresolved external symbol _tls_used referenced in function "nothrow @nogc void[] rt.sections_win64.initTLSRanges()" (_D2rt14sections_win6413initTLSRangesFNbNiZAv)
1>C:\Users\...\PROJECT.exe : fatal error LNK1120: 6 unresolved externals

On 08/09/2019 00:30, malpropism wrote:
> I just ported my Java application to D, got it to compile, but not to link.
> 
> I'm using Windows 10 64 bit, DMD 2.088.0 , Visual D 0.50.1.  This would be a C/C++ project in Visual Studio with only D code.
> 
> With my first attempt, I'm missing 65 externals, 328 errors.
> 
> I added these two files
> 
> ucrt.lib
> vcruntime.lib
> 
> to the Additional Dependencies in the linker property pages and have my missing external count down to 6, 70 errors.
> 
> I'm missing the following 6 symbols:
> 
> _fltused _tls_index _tls_used localtime tzset mainCRTStartup
> 
> What other libs would I need to add to the linker's additional dependencies?

I suspect you have disabled the C runtime library selection in the D compilation options to build against the shared C runtime DLLs (you can select that, too). Or your code might be missing a main function in which case the selection might not be embedded into any object file.

In this case, you should add msvcrt.lib instead of vcruntime.lib. Depending on used functionality you will also need legacy_stdio_definitions.lib.

Thanks for very prompt reply and apologies for my extremely late answer.  Due to the current situation, I now have much more time to work on this.

In short, I upgraded to the most recent (1.20.1) LDC compiler, the most recent (0.52.0) Visual D, but am staying with VS 2017.

When I try to compile and link with "Release", the linker unresolved symbols problem goes away.  (Things which are too good to be true usually are)

When I try to compile and link with "Debug", I'm back to a similar state as before.   (429 errors, 175 unresolved externals)

I also tried adding a small .cpp file thinking it might trick the linker setup to add more files and libraries, I got more (455) errors.

When I save the linker output /VERBOSE:lib and compare the linker output, I have appended what stands out: (that is, missing from Debug yet present in Release)

----------------------------------------------------------------------------

1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\ws2_32.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\wsock32.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\oldnames.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\legacy_stdio_wide_specifiers.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\vcruntime.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\ucrt\x64\ucrt.lib:


1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\shell32.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\ole32.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\oleaut32.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\uuid.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\odbc32.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\odbccp32.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\ws2_32.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\wsock32.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\oldnames.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\legacy_stdio_wide_specifiers.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\vcruntime.lib:

1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\ws2_32.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\wsock32.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\oldnames.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\legacy_stdio_wide_specifiers.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\vcruntime.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\ucrt\x64\ucrt.lib:


1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\ws2_32.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\um\x64\wsock32.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\oldnames.lib:
2>LINK : /LTCG specified but no code generation required; remove /LTCG from the link command line to improve linker performance
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\legacy_stdio_wide_specifiers.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\vcruntime.lib:
1>    Searching C:\Program Files (x86)\Windows Kits\10\lib\10.0.17763.0\ucrt\x64\ucrt.lib:
1>
1>Finished searching libraries
1>
1>Searching libraries
1>    Searching C:\Program Files\LDC2\lib\phobos2-ldc.lib:
1>    Searching C:\Program Files\LDC2\lib\druntime-ldc.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\legacy_stdio_definitions.lib:
1>    Searching C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\lib\x64\msvcrt.lib:

If I remember correctly VS studio has different release and debug configurations for both compiler and linker. If release works but debug doesnt make sure that when you add things to one to also add to another

Thanks for your suggestion.  In VS 2017, the Property Pages have a configuration drop down list box which allows you select among Active(Debug), Debug, Release, and All Configurations.  Mine was set to All Configurations, leaving me to believe that setting something would apply to both Debug and Release.   On the surface it seemed to work, setting one or another parameter was felt in both Debug and Release.  Verbose -v compilation, for example.

Your message gave me the idea to check the .vcxproj file directly and sure enough, Debug and Release were (quite) different, the relevant offending bit of XML in the Debug linker area was

<IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>