Why built-in functions?

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1 total messages Started by Jason Merrill Wed, 09 Sep 1992 01:56

#1098

Author: Jason Merrill
Date: Wed, 09 Sep 1992 01:56

13 lines
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     I thought that the gcc built-in functions were functions that the
compiler included code for, perhaps in the compiler itself, perhaps
libgcc.a.  However, today I tried compiling a test program that used memcpy
and looking at the object file produced; yup, memcpy was listed as an
undefined symbol.  Then I looked at libgcc.a, and couldn't find memcpy
there.

     So, what purpose do the gcc built-in functions serve?  Are they only
there so you don't have to include certain header files?

--
Jason Merrill
jason@jarthur.claremont.edu

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