# Reported issues for Compiler Explorer Pod holds 19 of 23 problems reported by people outside the maintainer team. Issues filed by the project's own owners, members and collaborators are excluded entirely — a maintainer's release checklist is not a warning to a prospective user. Back to [Compiler Explorer](/mcp/compiler-explorer). ## Most discussed ### [REQUEST] Support executing Windows binaries CE has wine to run cl.exe, so it should also be possible to run Windows executables after compiling This will also help running C++/CLI binaries after installing .NET Core or mono. Currently there are very few places that you can try C++/CLI code online [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/1879) · 2020-03-07 · closed · outside contributor · 13 comments ### [LIB REQUEST] Add ULib Library (C++) Hey! I think ULib (https://github.com/stefanocasazza/ULib) would be a great library to add. Is there some formal way to submit this request? [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/572) · 2017-10-10 · closed · external user · 8 comments ### [BUG] "Adding a new library" docs point to non-existent wiki page **Describe the bug** In the latest revision - b5d340abb80d7315495eaf710afe38bccf8f32c4 - the "[Putting it all together](https://github.com/compiler-explorer/compiler-explorer/blob/b5d340abb80d7315495eaf710afe38bccf8f32c4/docs/AddingALibrary.md#putting-it-all-together)" section of "Adding a new library" - says to "update the wiki" - linking to this URL: https://github.com/comp [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/2532) · 2021-03-29 · closed · outside contributor · 6 comments ### WebAsm compilers missing from C Sometimes the WebAssembly entry does not show. Check out https://godbolt.org/z/sq8G6d Here's the screenshot. Usually WebAssembly comes between RISC-V and X86-64. ![image](https://user-images.githubusercontent.com/633973/94152000-af433200-fe40-11ea-974c-4fc9d905715c.png) https://twitter.com/pocmatos/status/1309055289124163586?s=20 [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/2229) · 2020-09-24 · closed · 5 comments ### [REQUEST]: Add Profile-Guided Optimization (PGO) support ### Is your feature request related to a problem? Please describe I am doing a [research / promoting](https://github.com/zamazan4ik/awesome-pgo) Profile-Guided Optimization (PGO) usage across different projects (mostly open-source). As you can see in the repository above, there are multiple benchmarks across different kinds of software where I compare "PGO vs non-PGO" performance. But from time to time, people ask me about smaller examples where PGO shines. And I think showing these kinds of [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/5414) · 2023-08-24 · closed · external user · 4 comments ### [REQUEST]: Consider adding C-Reduce as tool for creating minimal bug reproducers ### Is your feature request related to a problem? Please describe I often use CE to triage suspected compiler bugs and create a minimal reproducer. Crafting a minimal reproducer for esoteric compiler bugs is an art form that can take a lot of effort. It would be nice to have tooling that helps automate the process of simplifying repros. [C-Reduce](https://github.com/csmith-project/creduce) is a tool designed exactly for this problem: > C-Reduce is a tool that takes a large C, C++, or Ope [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/4826) · 2023-03-07 · open · outside contributor · 4 comments ### [LANGUAGE REQUEST]: Dart, the language with AOT used by Flutter ### Compiler name Dart ### Compiler version latest ### Compiler language Dart ### Compiler homepage https://dart.dev/overview#native-platform or https://dart.dev/ ### Motivation Dart is the language used by Flutter. Flutter is a popular cross-platform rapid-development mobile framework, and many many many people are using it to develop apps. (For example, I have written >100kloc of Dart code to develop my Flutter app). As we know, performance is very critical for mobile apps, since p [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/3099) · 2021-11-07 · closed · external user · 4 comments ### [BUG]: cc65 output is broken ### Describe the bug Selecting any cc65 target produces incorrect assembly output. It looks like you are using da65 to disassemble the output created by cc65, which happens to be an assembler ("text") file, not a binary. This can obviously not work :) I see the intend of why this is done - BUT, unfortunately, da65 does not work as you think it does - it can NOT disassemble object files created by the compiler. So even if you changed the compile step to produce an object file, da65 could s [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/4273) · 2022-11-10 · open · external user · 3 comments ## Most recent ### [REQUEST]: Translate LLVM webassembly output to machine code with wasmtime ### Is your feature request related to a problem? Please describe I'd like to see, when a given program (in e.g. rust, c, zig) is compiled to webassembly, what machine code that generates with wasmtime. Also for `wasmtime` development, being able to quickly check how a piece of c/rust/zig code gets optimized would be incredibly useful. ### Describe the solution you'd like The process involves these steps: - save the LLVM webassembly output (note: this is not .wasm, which is a binary forma [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/7571) · 2025-04-15 · open · external user · 0 comments ### [REQUEST]: Support for compiled C libraries ### Is your feature request related to a problem? Please describe Trying to get lzma working in C. It compiles statically, and there's a bunch of special casing to handle `cshared` libraries, but not for C. In this instance a C library can be used as-is pretty much by any compiler I think? ### Describe the solution you'd like Ideally a way of getting a C library built and used. ### Describe alternatives you've considered I naively tried using the C++ build setup and it builds just fine but [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/6585) · 2024-06-11 · open · 1 comment ### Migrate away from async_hooks Node docs be like: > We strongly discourage the use of the async_hooks API. Other APIs that can cover most of its use cases include: > [AsyncLocalStorage](https://nodejs.org/api/async_context.html#class-asynclocalstorage) tracks async context [process.getActiveResourcesInfo()](https://nodejs.org/api/process.html#processgetactiveresourcesinfo) tracks active resources We use this in compilation-queue.ts [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/6386) · 2024-04-23 · open · 1 comment ### [COMPILER REQUEST]: RISC-V binutils & RISC-V simulator (Spike) & RISC-V Proxy Kernel ### Compiler name RISC-V binutils and Spike and RISC-V Proxy Kernel ### Compiler version trunk rv64gc, 1.1.0 Spike, 1.0.0 RISC-V Proxy Kernel ### Compiler language Assembly, RISC-V code ### Compiler homepage https://www.gnu.org/software/binutils/, https://github.com/riscv-software-src/riscv-isa-sim, https://github.com/riscv-software-src/riscv-pk ### Motivation Be able to compile asm code into binary and run the compiled code on the RISC-V simulator - Spike or on a just-enough kernel - [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/4527) · 2023-01-01 · open · external user · 1 comment ### [COMPILER REQUEST]: TI ARM compiler tools (armcl) ### Compiler name TI Arm® C/C++ Compiler Tools ### Compiler version ARM-20.2.7.LTS ### Compiler language C and C++ ### Compiler homepage https://www.ti.com/tool/ARM-CGT ### Motivation This is one of two compiler toolchains for ARM that come with TI Code Composer Studio. It is used for TI's ARM microcontrollers such as the popular Tiva series. The other is `tiarmclang` (#4479) [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/4478) · 2022-12-21 · closed · outside contributor · 1 comment ### [REQUEST]: Add clang internal generation of SPIR-V ### Is your feature request related to a problem? Please describe Clang currently generates SPIR-V binaries natively w/o the use of external tools such as llvm-spirv. It would be good to use this new flow in CE but however it doesn't come in standard installation of clang and needs to be enabled by a new build flag: `-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=SPIRV` in cmake. The main reason for this is that it̀s incomplete. ### Describe the solution you'd like It would be possible to modify the cu [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/4377) · 2022-12-01 · open · outside contributor · 1 comment ### [LIB REQUEST] Support OpenGL based libraries Can we still add CsGui ? It is perharps the most important part of copperspice _Originally posted by @janwilmans in https://github.com/compiler-explorer/compiler-explorer/issues/1670#issuecomment-1297856866_ This requires installing an OpenGL library.. somehow.. [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/4222) · 2022-11-01 · open · 0 comments ### [REQUEST]: support core, stg and cmm output from GHC ### Is your feature request related to a problem? Please describe GHC can produce some intermediary outputs (like GCC and Rust). It would be nice if those could be optionally captured! ### Describe the solution you'd like Under the tools dropdown menu there would be choice like LLVM IR, MIR output etc that pops up a new pane. ### Describe alternatives you've considered I currently pass ex `-ddump-stg` flags to the compiler and look at the output window. ### Additional context _No response [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/3571) · 2022-04-26 · closed · outside contributor · 2 comments ### [LIB REQUEST]: OpenBLAS ### Library name OpenBLAS ### Library description OpenBLAS is an optimized BLAS (Basic Linear Algebra Subprograms) library based on GotoBLAS2 1.13 BSD version. ### Library repository https://github.com/xianyi/OpenBLAS ### Motivation I've been attempting to teach the usage of basic HPC libraries, of which OpenBLAS is one of the largest. Serving as one of the easiest to use references for linear algebra implementations in SIMD, it also serves to teach how seemingly serial code can be vector [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/3426) · 2022-03-04 · open · external user · 3 comments ### [REQUEST]: Support executionWrapper options ### Is your feature request related to a problem? Please describe I'm using compiler-explorer with an execution simulator, so when you "run" the program it actually runs it through a simulator. It works great using `executionWrapper=my_simulator`, however `my_simulator` has lots of command line options you can set, e.g. for instruction tracing. As far as I can see there is currently no way to provide extra options so it would run e.g. `my_simulator --trace the_binary`. I imagine this migh [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/3097) · 2021-11-03 · open · outside contributor · 1 comment ### [REQUEST] Asyncify getOutputFilename() See #2481 [Read the thread](https://github.com/compiler-explorer/compiler-explorer/issues/2486) · 2021-03-11 · open · 0 comments The remaining reports are on [the project's issue tracker](https://github.com/compiler-explorer/compiler-explorer/issues).