Warnings when running sudo make install

[sbrl]

When I run sudo make install, I get the following warnings:

Scanning dependencies of target catimg
[ 25%] Building C object CMakeFiles/catimg.dir/src/sh_color.c.o
[ 50%] Building C object CMakeFiles/catimg.dir/src/sh_utils.c.o
[ 75%] Building C object CMakeFiles/catimg.dir/src/catimg.c.o
/tmp/catimg/src/catimg.c: In function ‘main’:
/tmp/catimg/src/catimg.c:84:20: warning: the address of ‘supportsUTF8’ will always evaluate as ‘true’ [-Waddress]
                if (supportsUTF8)
                    ^
/tmp/catimg/src/catimg.c:113:41: warning: implicit declaration of function ‘usleep’ [-Wimplicit-function-declaration]
                                         usleep(img.delays[frame - 1] * 10000);
                                         ^
/tmp/catimg/src/catimg.c:101:17: warning: ignoring return value of ‘system’, declared with attribute warn_unused_result [-Wunused-result]
                 system("clear");
                 ^
[100%] Building C object CMakeFiles/catimg.dir/src/sh_image.c.o
In file included from /tmp/catimg/src/sh_image.c:3:0:
/tmp/catimg/src/stb_image.h: In function ‘stbi__gif_load_next’:
/tmp/catimg/src/stb_image.h:5653:84: warning: unused parameter ‘req_comp’ [-Wunused-parameter]
 static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp)
                                                                                    ^
/tmp/catimg/src/sh_image.c: In function ‘stbi_xload’:
/tmp/catimg/src/sh_image.c:37:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
                 while (gr->data = stbi__gif_load_next(&s, &g, channels, 4))
                 ^
/tmp/catimg/src/sh_image.c: In function ‘img_load_from_file’:
/tmp/catimg/src/sh_image.c:164:33: warning: ‘pixelSetter’ may be used uninitialized in this function [-Wmaybe-uninitialized]
                                 pixelSetter(&img->pixels[j + frame*w*h], ptr + i * sizeof(unsigned char) + offset);
                                 ^
Linking C executable bin/catimg
[100%] Built target catimg
Install the project...
-- Install configuration: "Release"
-- Installing: /usr/local/bin/catimg

I didn't know whether this is a problem, so I thought I'd report it - just to be on the safe side. Here's my uname -a:

Linux starbeamrainbowlabs.com 2.6.32-042stab111.12 #1 SMP Thu Sep 17 11:38:20 MSK 2015 x86_64 x86_64 x86_64 GNU/Linux

[posva]

Hi, thanks for the report I was ignoring a warning that was actually an error 😅

[posva]

If you have suggestions for the remaining warnings I'd love to hear about it 😉

[sbrl]

Thanks for the help! :) I don't have any suggestions, but I do find this useful on servers that don't have a gui.

I don't know much C(++) yet, but I might be able to help later on as I'm learning it now!

[posva]

@sbrl I even use it in my desktop xD

The code for catimg is quite simple to be honest (compared to other C projects)