How to run c code in Linux if linux is installed on usb -

How to run c code in Linux if linux is installed on usb -

i've installed linux mint on usb hard drive got slow. want compile , run c code. compiled linux in usb , i've store programme in 1 of hard drive ntfs/fat partitions i'm getting bash permission denied error should run code? cannot store programme in usb(linux partition)

probably problem nfs/vfat systems mounted noexec flag or maybe showexec flag. instruct kernel not run executable these partitions (a security measure).

if showexec, matter of naming executable .exe, .com or .bat extension (yes, if linux executable, vfat driver uses extension infer executable permission bit).

if noexec, read on...

on older kernels bypass /ld-*.so trick, man mount comments:

noexec: [...] (until possible run binaries anyway using command /lib/ld*.so /mnt/binary. trick fails since linux 2.4.25 / 2.6.0.)

if guess correct, have several options:

a. remove flag partition, command root:

mount -o remount,exec <mount-point>

b. find out why partitions have flag, programme (gnome-disks or whatever) , alter it.

c. compile programme partition, if not in usb partition, illustration in tmpfs:

mkdir exe sudo mount -t tmpfs exe exe

and then, when compile program:

gcc test.c -o exe/test

but beware! tmpfs volatile , disappear when umount or shut downwards machine. can create permanent partition-in-a-file:

truncate -s 512m exe.img mkfs.ext4 exe.img mkdir exe

then, mount image each time boot machine:

sudo mount -o loop exe.img exe

c linux