Can't compile any c/ c++ program, linker problem

Question

It's my second post here, i have a huge problem which prevents me to study so i have to fix it as soon as it's possible !

My gcc was working fine and i had to work on FairThreads (in C). I downloaded the following archive :

Fair Threads

As you can see, in /src there's a makeFile, i replaced the second line which was :

LIB_DIR     = ../lib

by LIB_DIR = /usr/bin/ld

and i compiled the makeFile by the command "make"

And now, i cannot compile any c/c++ program anymore. Even a hello world program.

I got the following error message on the terminal for every compiling attempt :

/usr/bin/ld: 2: /usr/bin/ld: Syntax error: newline unexpected
collect2: error: ld returned 2 exit status

I have found on the net this solution but it doesn't work for me :

sudo apt-get autoremove binutils    
sudo apt-get install binutils

I also tried to reinstall gcc, when executing :

sudo apt-get purge gcc 

i got :

Des erreurs ont été rencontrées pendant l'exécution :
  linux-firmware
  linux-image-generic-hwe-18.04
  linux-generic-hwe-18.04
E: Sub-process /usr/bin/dpkg returned an error code (1)

but when i trie a gcc --version it tells me that it is not found.

So when i execute the command to reintall it :

sudo apt-get install gcc 

i also get :

Des erreurs ont été rencontrées pendant l'exécution :
 linux-firmware
 linux-image-generic-hwe-18.04
 linux-generic-hwe-18.04
 linux-image-5.4.0-72-generic
 initramfs-tools
E: Sub-process /usr/bin/dpkg returned an error code (1)

but gcc --version tellls that it's installed.

Finally, when i trie to compile a program, i got :

/usr/bin/ld: 2: /usr/bin/ld: Syntax error: newline unexpected
collect2: error: ld returned 2 exit status

I hope that i explained well, and i'll get a solution for this :/, as a computer science student, i can't do anything without gcc :(

EDIT 1 :

When i try to remove bin/ld by executing :

sudo rm -fr /usr/bin/ld;sudo apt-get install --reinstall binutils

i got :

Des erreurs ont été rencontrées pendant l'exécution :
 linux-firmware
 linux-image-generic-hwe-18.04
 linux-generic-hwe-18.04
 linux-image-5.4.0-72-generic
 initramfs-tools
E: Sub-process /usr/bin/dpkg returned an error code (1)

and this particular error message :

WARNING: no ldd around - install libc-bin

EDIT :

I have installed ldd by the command :

sudo apt-get install libc-bin

still no changes...

Answer 1

You overwrote the binary /usr/bin/ld (although you do not say so, I assume you ran make as root).

You will have to remove and reinstall /usr/bin/ld to have a sane build environment.

If you are on a Debian derivative, sudo rm -rf /usr/bin/ld;sudo apt-get install --reinstall binutils should do it.