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I have the same problem as OP, but do not have administrator rights, and cannot run sudo commands. What is the easiest solution in that case?

xApple
– xApple

2019-09-13 10:05:32 +00:00
Commented Sep 13, 2019 at 10:05
manually download the libffi-dev ubuntu package and extract the package, then define environment variable LIBRARY_PATH to point to the library folder which you just extracted and try to build

SwKEmb
– SwKEmb

2019-09-26 05:34:51 +00:00
Commented Sep 26, 2019 at 5:34

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Correct minor typos or mistakes
Clarify meaning without changing it
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create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
to make links (use https whenever possible)

<https://example.com>

[example](https://example.com)

<a href="https://example.com">example</a>

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