View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000198 | file | General | public | 2020-09-20 10:00 | 2020-12-15 23:58 |
| Reporter | Thomas | Assigned To | christos | ||
| Priority | normal | Severity | block | Reproducibility | always |
| Status | feedback | Resolution | open | ||
| Platform | Intel64 | OS | Ubuntu | OS Version | 18.04 |
| Product Version | 5.39 | ||||
| Summary | 0000198: Compiling with emscripten to WebAssembly fails | ||||
| Description | I'm trying to compile libmagic to WebAssembly by using the emscripten toolchain to be able to use it in a WebExtension. It would be sufficient to get a static library. Unfortunately, the build of the library requires the execution of another target (e. g. file, to compile the magic list). This is a show stopper for emscripten, because executable targets will be WASM/JS (instead of a binary) and for sure not be executable on any build system. According to the comment in 'magic/Makefile.am' line 333 (https://github.com/file/file/blob/master/magic/Makefile.am#L333), you might already be aware of this problem. It would be nice to have a fix for this soon. If you know any workaround for this, I would appreciate it to let me know. Thanks for looking into it! | ||||
| Steps To Reproduce | # setup emscripten first: https://emscripten.org/docs/getting_started/downloads.html#installation-instructions cd /tmp git clone https://github.com/file/file cd file autoreconf -i emconfigure ./configure --prefix=/tmp/file --enable-static=yes --disable-shared emmake make | ||||
| Additional Information | Error log: Making all in magic make[2]: Entering directory '/tmp/file/magic' ../src/file -C -m magic /bin/bash: ../src/file: Permission denied Makefile:831: recipe for target 'magic.mgc' failed make[2]: *** [magic.mgc] Error 126 make[2]: Leaving directory '/tmp/file/magic' Makefile:460: recipe for target 'all-recursive' failed make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory '/tmp/file' Makefile:369: recipe for target 'all' failed make: *** [all] Error 2 | ||||
| Tags | build | ||||
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The file binary is built before it is being used to compile the magic database. So you are fine, you have a file binary and libmagic. Building magic.mgc can be done using a native build (and the same file will be produced). I don't really have the time to figure out the autoconf magic to make it build a native version of file in a cross-compile environment. |
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Do you have a target that allows to only build libmagic (without the file binary and especially without magic.mgc)? And do you have a target or two to only build the file binary and magic.mgc? |
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cd src && make libmagic.la cd magic && make magic.mgc cd src && make file Like that? |
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Sounds promising, thank you! I cannot test it right now, but I'll give you feedback on that in several weeks and I will also post a solution for emscripten, if found. |
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Waiting on feedback. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2020-09-20 10:00 | Thomas | New Issue | |
| 2020-09-20 10:00 | Thomas | Tag Attached: build | |
| 2020-10-11 20:05 | christos | Note Added: 0003487 | |
| 2020-10-12 04:53 | Thomas | Note Added: 0003493 | |
| 2020-10-14 21:13 | christos | Note Added: 0003496 | |
| 2020-10-17 17:35 | Thomas | Note Added: 0003497 | |
| 2020-12-15 23:58 | christos | Assigned To | => christos |
| 2020-12-15 23:58 | christos | Status | new => assigned |
| 2020-12-15 23:58 | christos | Status | assigned => feedback |
| 2020-12-15 23:58 | christos | Note Added: 0003502 |
