/[autoconf]/autoconf/doc/autoconf.texi
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revision 1.728 by akim, Tue Apr 8 07:18:15 2003 UTC revision 1.729 by meyering, Sat Apr 12 20:53:33 2003 UTC
# Line 5252  installers who run into trouble in this Line 5252  installers who run into trouble in this
5252  like GCC to compile their C code.  like GCC to compile their C code.
5253  @end defmac  @end defmac
5254    
5255    @defmac AC_C_RESTRICT
5256    @acindex C_RESTRICT
5257    @cvindex restrict
5258    If the C compiler recognizes the @code{restrict} keyword, don't do anything.
5259    If it recognizes only a variant spelling (@code{__restrict},
5260    @code{__restrict__}, or @code{_Restrict}), then define
5261    @code{restrict} to that.
5262    Otherwise, define @code{restrict} to be empty.
5263    Thus, programs may simply use @code{restrict} as if every C compiler
5264    supported it; for those that do not, the @file{Makefile}
5265    or configuration header defines it away.
5266    
5267    Although support in C++ for the @code{restrict} keyword is not
5268    required, several C++ compilers do accept the keyword.
5269    This macro works for them, too.
5270    @end defmac
5271    
5272  @defmac AC_C_VOLATILE  @defmac AC_C_VOLATILE
5273  @acindex{C_VOLATILE}  @acindex{C_VOLATILE}
5274  @cvindex volatile  @cvindex volatile

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