Building gmic after some changes to CImg.h

I was attempting to build the gmic cli, but I have retrieved this error:

User@MM-DESKTOP MINGW64 /c/gmic-devel/gmic/src
$ make cli
make "CFLAGS+=-Dcimg_date=\\\"\\\" -Dcimg_time=\\\"\\\" -Dcimg_use_zlib -I. -IC:/msys64/mingw64/include  -Dgmic_prerelease="\\\"220226\\\""  -std=c++11 -pedantic -Wall -Wextra -Wfatal-errors -Werror=unknown-pragmas -Werror=unused-label -Wshadow -Dcimg_use_abort -Dgmic_is_parallel -Dcimg_use_fftw3 -IC:/msys64/mingw64/include  -Dcimg_use_curl -IC:/msys64/mingw64/include  -Dcimg_use_png -IC:/msys64/mingw64/include/libpng16 -IC:/msys64/mingw64/include  -Dcimg_use_jpeg -IC:/msys64/mingw64/include  -Dcimg_use_tiff -IC:/msys64/mingw64/include  -fopenmp -Dcimg_use_openmp -Dcimg_display=2 -Ofast -mtune=generic " "LIBS+=gmic.o -LC:/msys64/mingw64/lib -lz   -L. -L/mingw64/lib -Wl,-rpath,. -Wl,--stack,16777216  -LC:/msys64/mingw64/lib -lfftw3  -LC:/msys64/mingw64/lib -lcurl  -LC:/msys64/mingw64/lib -lpng16 -lz  -LC:/msys64/mingw64/lib -ljpeg  -LC:/msys64/mingw64/lib -ltiff  -lgomp -lgdi32 " gmic.o _cli
make[1]: Entering directory '/c/gmic-devel/gmic/src'
make[1]: 'gmic.o' is up to date.
make[1]: Nothing to be done for '_cli'.
make[1]: Leaving directory '/c/gmic-devel/gmic/src'
strip gmic.exe

Here’s the changes I have done for CImg.h →
changes.zip (794 Bytes)

The purpose of the changes is to do this:

concat(10,22,115) => 1022115

I figured the solution: Delete the built file, then build again.