Macros

• %macro or %{macro} or %(shellcommand)

  • evaluated when encountered at build time
  • may be nested

• predefined: %_os, %_arch, %_builddir, %SOURCE0 ...

• %define product gcc -> %product

• %(md5sum %{SOURCE0})

  • evaluates to MD5 checksum of 1st source file

• conditionals are available