llnl/blt

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A streamlined CMake build system foundation for developing HPC software

Stars: 296
Forks: 66
Open beginner issues: 1
Indexed issues: 131
Avg merge: 1h 3m
Merged PRs (30d): 1

Dominant language: C++
License: BSD-3-Clause
Last GitHub push: Aug 20, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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131 open issues indexed

blt_patch_target needs to handle import targets Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

llnl/blt#775 · Opened Sep 15, 2026
BLT OpenMP setup overwrites consumer options on `OpenMP::OpenMP_Fortran Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

llnl/blt#773 · Opened Aug 21, 2026
enhanced staging sphinx documentation Open

llnl/blt#765 · 1 assignee · Opened Jun 2, 2026
Create ability to error out if a below minimum required BLT_CXX_STD is set Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

llnl/blt#758 · 1 comment · Opened Mar 25, 2026
Fix default hip debug flags Open

bug cmake hip

Difficulty 3/5 1-2 days Newbie friendliness 48/100

llnl/blt#757 · Opened Mar 6, 2026
issue finding HIP Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

llnl/blt#756 · 11 comments · Opened Mar 3, 2026
BLT subproject changes behavior of non-BLT parent project Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/blt#751 · 7 comments · 1 reaction · Opened Jan 6, 2026
Investigate adding `ENABLE_SYCL` Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

llnl/blt#742 · Opened Nov 6, 2025
Warning coming from builtin GoogleTest Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

llnl/blt#738 · Opened Oct 22, 2025
Update cmake_minimum_required version Open

maintenance

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

llnl/blt#727 · Opened Aug 28, 2025
`blt::openmp` INTERFACE_COMPILE_OPTIONS may not delimit lists correctly. Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

llnl/blt#723 · Opened Aug 14, 2025
in the future, will CMAKE_CUDA_HOST_COMPILER continue to be required? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/blt#720 · Opened May 13, 2025
should this be `blt::hip` instead of `blt_hip`? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/blt#718 · 3 comments · Opened Apr 28, 2025
Document which macros are installed via `blt_install_tpl_setups` Open

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

llnl/blt#716 · 1 reaction · Opened Mar 11, 2025
Surprising behavior with FetchContent Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

llnl/blt#711 · Opened Dec 5, 2024
SetupCompilerOptions erroneously classifies "CrayClang" as "Clang" Open

Difficulty 2/5 1-3 hours Newbie friendliness 64/100

llnl/blt#699 · Opened Sep 10, 2024
fortran vs mpi logic Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

llnl/blt#697 · Opened Sep 5, 2024
incrementally add sources + headers to lib using blt Open

feature

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/blt#690 · 2 comments · Opened May 9, 2024
add target_compile_features option / plumbing to blt_add_library Open

feature

Difficulty 4/5 3-5 days Newbie friendliness 28/100

llnl/blt#689 · Opened May 9, 2024
Use of ALIAS target magic requires newish cmake Open

bug documentation

Difficulty 3/5 1-2 days Newbie friendliness 35/100

llnl/blt#677 · Opened Jan 19, 2024
Add support for `fpreffity` fortran formatter Open

code checks fortran

Difficulty 3/5 1-2 days Newbie friendliness 45/100

llnl/blt#669 · Opened Dec 19, 2023
Override system include flag when necessary Open

documentation feature question User Request

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/blt#666 · Opened Nov 22, 2023
Compiler error with gcc+hip Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/blt#662 · Opened Nov 1, 2023
Missing case in `blt_patch_target` and `blt_determine_scope` Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

llnl/blt#658 · Opened Oct 4, 2023
bug: setting ENABLE_CLANG_CUDA and BLT_CXX_STD=c++17 causes error Open

clang cuda

llnl/blt#657 · 1 assignee · Opened Sep 27, 2023
CMake Install Logic Checklist Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

llnl/blt#655 · Opened Aug 30, 2023
Modify behavior of `blt_list_append` ? Open

design question User Request

Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/blt#654 · Opened Aug 30, 2023
Create tutorial for static analysis and friends Open

Difficulty 5/5 Over a week Newbie friendliness 18/100

llnl/blt#651 · Opened Aug 3, 2023
Internal test checking for c++1X but not c++2X Open

testing

Difficulty 1/5 Under an hour Newbie friendliness 50/100

llnl/blt#631 · Opened Apr 20, 2023
`CUDA_SEPARABLE_COMPILATION` should just be removed Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

llnl/blt#626 · 1 comment · Opened Mar 28, 2023
Issue with dependency propagation for object libraries Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/blt#618 · Opened Jan 19, 2023
BLT_CXX_STD checks should work like standard cmake if Open

Difficulty 2/5 1-3 hours Newbie friendliness 50/100

llnl/blt#617 · Opened Jan 12, 2023
Wrong compile flags passed to nvcc by gtest Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

llnl/blt#615 · Opened Jan 12, 2023
Support building with Ninja using MSVC Open

Difficulty 2/5 1-3 hours Newbie friendliness 50/100

llnl/blt#614 · 2 comments · Opened Jan 11, 2023
check to defend against bad linker flags? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/blt#610 · Opened Jan 6, 2023
BLT cmake language suport initialization difference between cuda and hip Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

llnl/blt#609 · 3 comments · Opened Dec 2, 2022
OpenMP target flags depend on CMake version Open

flags maintenance openmp

Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/blt#606 · 2 comments · Opened Nov 17, 2022
built-in gtest cmake find python order of operations suprise Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

llnl/blt#605 · 1 comment · Opened Nov 4, 2022
Quiet policy warning Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

llnl/blt#603 · 1 reaction · Opened Oct 13, 2022
Update Mac Image version Open

Difficulty 1/5 Under an hour Newbie friendliness 55/100

llnl/blt#597 · 1 comment · Opened Sep 22, 2022
Improve BLT's export logic Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

llnl/blt#593 · 1 comment · 1 reaction · Opened Aug 11, 2022
Serac: Problem with OpenMP + CUDA Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/blt#589 · 1 comment · Opened Aug 1, 2022
blt_hip_smoke false positive Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

llnl/blt#586 · 1 comment · Opened Jul 22, 2022
adapt cmake rpath settings? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/blt#581 · Opened Apr 12, 2022
Patch `fruit` against "Null literal string" error Open

bug fortran User Request

Difficulty 1/5 1-3 hours Newbie friendliness 55/100

llnl/blt#580 · Opened Apr 1, 2022
Why is CMAKE_CUDA_ARCHITECTURES not enough Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

llnl/blt#576 · 1 comment · Opened Mar 19, 2022
Build jobs are not staying inside the larger allocation Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/blt#573 · Opened Mar 18, 2022
`FOO-NOTFOUND` in `blt_add_executable` `DEPENDS_ON` list causes all dependencies to be lost Open

bug User Request

Difficulty 3/5 1-2 days Newbie friendliness 52/100

llnl/blt#560 · Opened Feb 2, 2022
blt_cuda_smoke compiled with default arch Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

llnl/blt#559 · 3 comments · Opened Jan 28, 2022
fortran vs cmake vs compiler flags Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

llnl/blt#558 · 1 comment · Opened Jan 27, 2022

llnl/blt

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