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QUESTION
My company uses FreeBSD, and therefore FreeBSD's flavor of make.
A few of our in-house ports include something like this (where BRANCH is something that came from an SVN URL, either 'trunk' or a branch name like 'branches/1.2.3').
...ANSWER
Answered 2021-Jun-11 at 22:29The documentation says:
:C/pattern/replacement/[1gW]The :C modifier is just like the :S modifier except that the old and new strings, instead of being simple strings, are an extended regular expression (see regex(3)) string pattern and an ed(1)-style string replacement.
and in :S:
Any character may be used as a delimiter for the parts of the modifier string.
As @MadScientist pointed out, it's quite common to use a different delimiter, especially when / is a part of pattern or replacement string, like in your case. Otherwise it would require escaping and would look like ${BRANCH:C/^branches\///} which seems less readable.
QUESTION
I do not understand why ar gives a warning when it is creating a library.
I do this:
...ANSWER
Answered 2021-May-31 at 20:42If the output file doesn't already exist, you are supposed to use the c modifier. From the man page:
c
Create the archive. The specified archive is always created if it did not exist, when you request an update. But a warning is issued unless you specify in advance that you expect to create it, by using this modifier.
So try ar rc foo.a foo.o to silence the warning.
QUESTION
I am trying to implement this solution:
Make xargs handle filenames that contain spaces
to cat several files that are to be selected using find.
Therefore, I have tried to implement the BSD solution provided in that post, but if I do:
...ANSWER
Answered 2021-May-30 at 11:34FreeBSD xargs does not support -d as suggested in a deleted answer, but the answer was useful as it clarified -0 usage and gives the hint to handle the new line characters as delimiters, so an inclusion of tr to turn \n into \0 can do the trick for FreeBSD:
QUESTION
I want to:
- prefix text beginning with a
!character in a line withESC E(beingESCoctal code\033) - suffix above text with
ESC Fat the end of the line.
This is what I have tried:
...ANSWER
Answered 2021-May-23 at 05:10Apply $'..' only for the required portion:
QUESTION
I am using ruby-2.0.0-p648 for rails 4.0.0.
Currently working on system macOS Catalina, when I run bundle install it gives following error,
ANSWER
Answered 2021-Apr-30 at 19:39Following did not work as v8 was installed via Homebrew and no symlink for following path was created,
QUESTION
I am trying to bundle on FreeBSD and it cannot find the grpc gem. I installed the grpc 1.30.2 version using a FreeBSD package but it cannot find the system gem.
I'm hoping there is a bundle config setting to find and use the system gem which is already built and intalled.
The error I get is:
...ANSWER
Answered 2021-Apr-27 at 15:01Looks like this may be my fault. The gem packages purposefully remove the cache dir from the gem. This was originally added here:
https://cgit.freebsd.org/ports/commit/Mk/bsd.ruby.mk?id=8d77480356f58d6d8d1c69884d1ba9cc98ed383a
and lives on here:
QUESTION
I am using a Motif Widget Scrolledlist. The list is created as follows:
...ANSWER
Answered 2021-Apr-11 at 14:00Each item contains a newline character; remove it.
I am also wondering why the focus is displayed with such a strong dotted line.
That is set by the list widget's resource XmNhighlightThickness,
whose default value is 2.
QUESTION
I have a rails app on Heroku. I can connect to it, push builds, and see that it's running.
The problem: I am unable to push builds that include migrations in the db>migrate folder. Any attempt to do so gives me an error of
remote: Run `bin/rails db:migrate` to update your database then try again. remote: You have 3 pending migrations: remote: 20210326003113 CreateUsers remote: 20210326004504 CreateAlerts remote: 20210326004819 CreateContacts remote: Waiting for release.... failed. To https://git.heroku.com/*appname* 3dca123..cc0f499 master -> master
I ran my migrations locally, committed, tested them locally (they work), then pushed to heroku with the same response as above.
I can run heroku run bin/rails db:migrate
which gives me a response of a bunch of warnings.
ANSWER
Answered 2021-Apr-03 at 01:03Solution was inside of my Procfile.
I needed to use bundle exec rails s.
Before I was using release: bin/rails db:migrate
QUESTION
Recently I was playing with freebsd system calls I had no problem for i386 part since its well documented at here. But i can't find same document for x86_64.
I saw people are using same way like on linux but they use just assembly not c. I suppose in my case system call actually changing some register which is used by high optimization level so it gives different behaviour.
...ANSWER
Answered 2021-Mar-31 at 21:36Here's a test framework to work with. It is [loosely] modeled on a H/W logic analyzer and/or things like dtrace.
It will save registers before and after the syscall instruction in a large global buffer.
After the loop terminates it will dump out a trace of all the register values that were stored.
It is multiple files. To extract:
- save the code below to a file (e.g.
/tmp/archive). - Create a directory: (e.g.)
/tmp/extract - cd to
/tmp/extract. - Then do:
perl /tmp/archive -go. - It will create some subdirectories:
/tmp/extract/syscalland/tmp/extract/snapliband store a few files there. - cd to the program target directory (e.g.)
cd /tmp/extract/syscall - build with:
make - Then, run with:
./syscall
Here is the file:
Edit: I've added a check for overflow of the snaplist buffer in the snapnow function. If the buffer is full, dumpall is called automatically. This is good in general but also necessary if the loop in main never terminates (i.e. without the check the post loop dump would never occur)
Edit: And, I've added optional "x86_64 red zone" support
QUESTION
I have been reading the makefile of xv6 project. I want to put all the user programs into a folder to keep the project tidy. I can not find where it compiles the user programs. I know that when i run: make fs.img; it will compile the user programs, but i can not find any commands to do so. I also want all the kernel code to go into a directory called "kernel".
Is there a feature in make that allows automatic compilation or is there just something I'm not seeing. And could anyone suggest any make docs to help me understand this makefile.
My Makefile:
...ANSWER
Answered 2021-Mar-25 at 12:30All make systems (as required by POSIX) have a number of built-in rules including rules that know how to compile object files from C files.
For information on GNU make's built-in rules you can review the manual.
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