How to use dub with a manual ldc installation?

Fri Nov 4 11:11:30 PDT 2016

On Friday, 4 November 2016 at 17:40:05 UTC, Andrei Alexandrescu 
wrote:
> On 11/04/2016 01:12 PM, Andrei Alexandrescu wrote:
>> So I'm working on the checkedint pull request (really need to 
>> get that
>> in...) and was trying to get some benchmarks going with ldc. 
>> The stock
>> ldc on mint is outdated and it can't compile the code, so I 
>> needed to do
>> a self-installation. I've put it in 
>> ~/bin/ldc2-1.1.0-beta3-linux-x86. Then:
>>
>> $ PATH=~/bin/ldc2-1.1.0-beta3-linux-x86/bin:$PATH
>
> Found the problem, sorry for the distraction. I'd downloaded 
> the 32-bit version not the 64-bit one. I got it working with 
> the right download.
>
> BTW the benchmark results have been pretty good:
>
> ======================================
> Running trialPrimes() benchmark...
>                                      int: 37 ms, 789 μs, and 8 
> hnsecs
>                      Checked!(int, void): 25 ms and 398 μs
>                      Checked!(int, Warn): 64 ms, 653 μs, and 9 
> hnsecs
>                                     uint: 42 ms, 361 μs, and 1 
> hnsec
>                     Checked!(uint, void): 42 ms, 49 μs, and 5 
> hnsecs
>                     Checked!(uint, Warn): 72 ms, 322 μs, and 7 
> hnsecs
>                                     long: 67 ms and 893 μs
>                     Checked!(long, void): 54 ms, 512 μs, and 3 
> hnsecs
>                     Checked!(long, Warn): 91 ms and 932 μs
>                                    ulong: 69 ms and 567 μs
>                    Checked!(ulong, void): 69 ms, 136 μs, and 4 
> hnsecs
>                    Checked!(ulong, Warn): 95 ms, 196 μs, and 7 
> hnsecs
> DONE
>
> Running collatzSort() benchmark...
>                                      int: 43 ms, 967 μs, and 9 
> hnsecs
>                      Checked!(int, void): 44 ms, 104 μs, and 8 
> hnsecs
>                      Checked!(int, Warn): 81 ms, 833 μs, and 1 
> hnsec
>                                     uint: 43 ms, 398 μs, and 3 
> hnsecs
>                     Checked!(uint, void): 43 ms, 560 μs, and 6 
> hnsecs
>                     Checked!(uint, Warn): 82 ms, 727 μs, and 7 
> hnsecs
>                                     long: 43 ms, 208 μs, and 4 
> hnsecs
>                     Checked!(long, void): 43 ms, 734 μs, and 5 
> hnsecs
>                     Checked!(long, Warn): 83 ms, 868 μs, and 5 
> hnsecs
>                                    ulong: 43 ms, 459 μs, and 4 
> hnsecs
>                    Checked!(ulong, void): 43 ms, 544 μs, and 5 
> hnsecs
>                    Checked!(ulong, Warn): 84 ms, 567 μs, and 7 
> hnsecs
> DONE
> ======================================
>
> The Checked!(int, void) type is a checkedint that just "goes 
> through" the framework (it's a wrapper struct that doesn't 
> insert any checks) and to ldc's credit it gets optimized to 
> pretty much a built-in int.
>
> The Checked!(int, Warn) type inserts all checks necessary to 
> print a warning to stderr in case anything wrong happens. We're 
> looking at a 2x speed reduction, which is up to par with 
> Thomas' library (https://code.dlang.org/packages/checkedint). 
> I've tried to run the corresponding test for that and ran into 
> a snag. It does work with dmd but not with my locally-installed 
> ldc. Any idea on what could be happening? Here's the trace:
>
> $dub run checkedint:tests --build=release --verbose 
> --compiler=$HOME/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2
>
> Using dub registry url 'http://code.dlang.org/'
> Refreshing local packages (refresh existing: true)...
> Looking for local package map at 
> /var/lib/dub/packages/local-packages.json
> Looking for local package map at 
> /home/andrei/.dub/packages/local-packages.json
> No package found in current working directory.
> Building package checkedint:tests in 
> /home/andrei/.dub/packages/checkedint-0.5.3/tests/
> Refreshing local packages (refresh existing: false)...
> Looking for local package map at 
> /var/lib/dub/packages/local-packages.json
> Looking for local package map at 
> /home/andrei/.dub/packages/local-packages.json
> Found dependency checkedint 0.5.3
> Checking for missing dependencies.
> Refreshing local packages (refresh existing: false)...
> Looking for local package map at 
> /var/lib/dub/packages/local-packages.json
> Looking for local package map at 
> /home/andrei/.dub/packages/local-packages.json
> Found dependency checkedint 0.5.3
> Checking for upgrades.
> Using cached upgrade results...
> Generating using build
> Generate target checkedint:tests (executable 
> /home/andrei/.dub/packages/checkedint-0.5.3/tests 
> checkedint_tests)
> Generate target checkedint (staticLibrary 
> /home/andrei/.dub/packages/checkedint-0.5.3 checkedint)
> Performing "release" build using 
> /home/andrei/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2 for 
> x86_64.
> Target 
> '/home/andrei/.dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/libcheckedint.a' doesn't exist, need rebuild.
> checkedint 0.5.3: building configuration "library"...
> /home/andrei/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2 -lib 
> -of.dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/libcheckedint.a -release -enable-inlining -O -ignore -w -oq -od=.dub/obj -d-version=Have_checkedint -I.dub/packages/checkedint-0.5.3/source/ .dub/packages/checkedint-0.5.3/source/checkedint/asserts.d .dub/packages/checkedint-0.5.3/source/checkedint/flags.d .dub/packages/checkedint-0.5.3/source/checkedint/noex.d .dub/packages/checkedint-0.5.3/source/checkedint/package.d .dub/packages/checkedint-0.5.3/source/checkedint/throws.d .dub/packages/checkedint-0.5.3/source/checkedint/traits.d .dub/packages/checkedint-0.5.3/source/future/bitop.d .dub/packages/checkedint-0.5.3/source/future/math.d .dub/packages/checkedint-0.5.3/source/future/traits0.d
> Error: failed to create path to file: 
> .dub/obj/.dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/libcheckedint.a
> No such file or directory
> FAIL 
> .dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/ checkedint staticLibrary
> /home/andrei/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2 failed 
> with exit code 1.
>
>
> Andrei

Nice progress!

About the compilation problems that you're observing, it's most 
likely due to LDC issue 
https://github.com/ldc-developers/ldc/issues/1819, which has been 
fixed since LDC 1.1.0-beta3, though no new version of LDC have 
been released since the bug was fixed. You can either build LDC 
master from source, or workaround the problem by presenting LDC 
as DMD via ldmd2, that is:
dub run checkedint:tests --build=release --verbose 
--compiler=$HOME/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldmd2