Gcc.md

# Print include path
g++ -E -x c++ - -v < /dev/null 
g++ -E -x c - -v < /dev/null 
* -E: stop after preprocessing
* -x language
* -v verbose

• Assemble

  • gcc file.c -masm=intel -S -o file.d # assemble
  • gcc -c file.s -i file.o # compile
  • gcc file.o -o file # link
  • gcc file.S -o file
  • .s means pure asm .S means macro too
  • man as
  • see inline asm
  • man objdump
  • -m32 # compile 32 must instal libc en 32 bits

• Echo include dirs

  • g++ -E -x c++ - -v < /dev/null
  • clang++ -E -x c++ - -v < /dev/null

• Use of Make

  • export CFLAGS="-g"

• Compile 32 bit

  • apt install gcc-multilib
  • gcc -m32
  • export CFLAGS="-g -m32 -static"
  • export LDFLAGS='-m32 -L/usr/lib32'