Build progress and unresolved Build error: "/usr/bin/ld: cannot find -lregex"

[Nathan-L-Cook]

Using Ubuntu-focal. Following these general build instructions: #1 (comment)

Firstly, what I have working. I ran into some issues that I was able to solve. I'll post them up here incase it's useful for anyone.:

Resolved Build Error 1) "gfortran error: unrecognized command line option '-fallow-argument-mismatch'; did you mean '-wno-argument-mismatch'?"
This one was related to needing a newer version of gFortran.
sudo apt-get install gfortran-10
Koko/Src/Makefile:

CC = gcc-10 # for now, only support GCC
FC = gfortran-10

Resolved Build Error 2) "gcc-10: fatal error: cannot execute 'cc1plus': execvp: no such file or directory"
Fixed from here: https://ahelpme.com/linux/ubuntu/install-and-make-gnu-gcc-10-default-in-ubuntu-20-04-focal/

sudo apt upgrade -y
sudo apt install -y build-essential
sudo apt install -y cmake
sudo apt install -y gcc-10 g++-10 cpp-10
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 --slave /usr/bin/g++ g++ /usr/bin/g++-10 --slave /usr/bin/gcov gcov /usr/bin/gcov-10

Now what's not working:
Unresolved Build Error 3) "/usr/bin/ld: cannot find -lregex"
From the Koko/Src/Makefile:
LIBS = -static -Wl,--start-group $(addprefix -l,$(SUBDIRS)) -llinenoise -lkmod -Wl,--end-group -lm -lstdc++ -lregex
Not sure how to fix this one. Any ideas? I got the source to build by removing that "-lregex" argument in the Makefile, but I'm pretty sure it's causing some character funny business on the command line.

[dinosauria123]

Did you installed regex library ?

I think it is libboost-regex-dev packages.

[Nathan-L-Cook]

Cool. I'll give that a shot.

[Nathan-L-Cook]

I installed libboost-regex-dev (and all the other dependencies that apt decided to get) but I'm getting the same build error.
"/usr/bin/ld: cannot find -lregex"

[dinosauria123]

Please check regcomp, regexec, regerror, regfree are installed in your system.

[dinosauria123]

Check https://packages.ubuntu.com/impish/libstdc%2B%2B-10-dev

[Nathan-L-Cook]

That's already installed.

sudo apt-get install libstdc++-10-dev
   libstdc++-10-dev is already the newest version (10.3.0-1ubuntu1~20.04).
sudo apt-get install libboost-regex-dev
   libboost-regex-dev is already the newest version (1.71.0.0ubuntu2).

Same Build error.

gfortran-10 -o koko-cli koko.o cmder.o names.o libload.o saverest.o  -L./lib -static -Wl,--start-group -lkmath -lldm -lconfig -lhardware -lmacro -loptimize -lparaxial -lpickup -lraytrace -lspecsurf -lnonseq -lutility -lwavespot -lglass -lplotcad -llinenoise -lkmod -Wl,--end-group -lm -lstdc++ -lregex
   /usr/bin/ld: cannot find -lregex

[dinosauria123]

Sorry for inconvenience.

Try to install libnfsidmap-regex,
This will make /usr/lib/x86_64-linux-gnu/regex.so

[Nathan-L-Cook]

Installed libnfsidmap-regex.
Same build error. Still can't find regex.
(thank you for the help. I really appreciate it. Since I started with a fresh Ubuntu-focal I think this process will be helpful for anyone setting up a build environment of Koko once we sort this out and it's working.)

[Nathan-L-Cook]

Since I started with a fresh Ubuntu-Focal install and followed Jonas231 build/install instructions above, I'm not sure what the deal is except for maybe something with Ubuntu-Focal.

If I was going to try this again with a different linux distro, what should I use? Straight Debian-Testing maybe? Mint?

[Nathan-L-Cook]

Just tried with Debian 11.2.0. (debian-11.2.0-amd64-netinst.iso)
Tried all the above regex stuff. Same deal. Still can't find -lregex
(but it also still apparently builds successfully if you just comment out that "#-lregex" at the end of that line of the makefile)

[dinosauria123]

Thank you for your info. I also found comment out "#-lregex" works fine on Ubuntu 21.10.
Original Jim Klien source does not need libregex.
We have added it for linenoise library, to make possible command completion for command inputs on koko-cli.

[Nathan-L-Cook]

One more update. So far, the easiest install has been using Ubuntu 21.10. Confirmed build there with "#-lregex" commented out. I'm going to try to build it on windows next.

[dinosauria123]

Thank you for your trials.
Windows binary build by me is here.

https://github.com/dinosauria123/Koko/releases/tag/20220129-win32-test

[Nathan-L-Cook]

Cool. My goal is to try to contribute, so I'm working on setting up a full development environment. I'll start a new issues for the problems with the windows build.