In what there can be a problem of the assembly of source codes?

Question

C++ / C#

Hello!
For the first time I'm trying to build someone else's library from source, I take every step up to a centimeter according to the instructions, but I still got an error during assembly:

...

gcc -c -o lib/glut/win32_menu.o lib/glut/win32_menu.c -mthreads -O3 -Iinclude -D
WIN32 -DNDEBUG -D_WINDOWS -D_MBCS -D_USRDLL -DGLUT32_EXPORTS -UGLUT_USE_SGI_OPEN
GL
gcc -c -o lib/glut/win32_util.o lib/glut/win32_util.c -mthreads -O3 -Iinclude -D
WIN32 -DNDEBUG -D_WINDOWS -D_MBCS -D_USRDLL -DGLUT32_EXPORTS -UGLUT_USE_SGI_OPEN
GL
gcc -c -o lib/glut/win32_winproc.o lib/glut/win32_winproc.c -mthreads -O3 -Iincl
ude -DWIN32 -DNDEBUG -D_WINDOWS -D_MBCS -D_USRDLL -DGLUT32_EXPORTS -UGLUT_USE_SG
I_OPENGL
lib/glut/win32_winproc.c: In function '__glutOnEnterMenuLoop':
lib/glut/win32_winproc.c:579:18: warning: multi-character character constant
lib/glut/win32_winproc.c: In function '__glutOnExitMenuLoop':
lib/glut/win32_winproc.c:588:19: warning: multi-character character constant
gcc -c -o lib/glut/win32_x11.o lib/glut/win32_x11.c -mthreads -O3 -Iinclude -DWI
N32 -DNDEBUG -D_WINDOWS -D_MBCS -D_USRDLL -DGLUT32_EXPORTS -UGLUT_USE_SGI_OPENGL

windres lib/glut/glut.rc lib/glut/resources.o
: Invalid argumentresources.o
mingw32-make: *** [lib/glut/resources.o] Error 1

I have been compiling the GLUT library according to their instructions for several hours and nothing comes out ... please tell me what could be the matter

Answer 1

windres lib/glut/glut.rc lib/glut/resources.o
: Invalid argumentresources.o

What can be wrong

windres doesn't like the second command line argument. It looks like it's expecting '\' as file path separator instead of '/'.
You can start by checking if this is the case by running windres like this: windres lib\glut\glut.rc lib\glut\resources.o
It's also worth checking that you are using windres from the same set as the rest of the build tools, and not some left.