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$ make
gcc -O3 -Wall   -c -o siddump.o siddump.c
siddump.c: In function ‘main’:
siddump.c:245:3: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result]
  245 |   fread(&mem[loadaddress], loadsize, 1, in);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
siddump.c: In function ‘readbyte’:
siddump.c:504:3: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result]
  504 |   fread(&res, 1, 1, f);
      |   ^~~~~~~~~~~~~~~~~~~~
siddump.c: In function ‘readword’:
siddump.c:512:3: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result]
  512 |   fread(&res, 2, 1, f);
      |   ^~~~~~~~~~~~~~~~~~~~
gcc -O3 -Wall   -c -o cpu.o cpu.c
gcc -o siddump.exe siddump.o cpu.o
/usr/bin/ld: siddump.o: in function `main':
siddump.c:(.text.startup+0x19c): undefined reference to `pow'
collect2: error: ld returned 1 exit status
make: *** [Makefile:7: siddump.exe] Error 1