fix documentation warnings and broken links

gcontini

2020-11-29 ecd2f38f3d9c8b28aaa4c47bc09789f11dcaa7f7

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MACRO(EVAL_CONDITION name)
   IF(${ARGN})
     SET(${name} 1)
   ELSE(${ARGN})
     SET(${name} 0)
   ENDIF(${ARGN})
ENDMACRO(EVAL_CONDITION)