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| -rw-r--r-- | doc/ghdl.texi | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/doc/ghdl.texi b/doc/ghdl.texi index 956e33e..62c2447 100644 --- a/doc/ghdl.texi +++ b/doc/ghdl.texi @@ -1695,6 +1695,7 @@ This chapter describes several implementation defined aspect of VHDL in GHDL. * VHDL files format:: * Top entity:: * Using vendor libraries:: +* Using ieee.math_real or ieee.math_complex:: * Interfacing to other languages:: @end menu @@ -1886,7 +1887,7 @@ default value; The ports type must be constrained. @end itemize -@node Using vendor libraries, Interfacing to other languages, Top entity, GHDL implementation of VHDL +@node Using vendor libraries, Using ieee.math_real or ieee.math_complex, Top entity, GHDL implementation of VHDL @comment node-name, next, previous, up @section Using vendor libraries Many vendors libraries have been analyzed with GHDL. There are @@ -1916,7 +1917,26 @@ declarations such as This files must be modified. Fortunatly, in the example the variables are never written. So it is enough to remove them. -@node Interfacing to other languages, , Using vendor libraries, GHDL implementation of VHDL +@node Using ieee.math_real or ieee.math_complex, Interfacing to other languages, Using vendor libraries, GHDL implementation of VHDL +@comment node-name, next, previous, up +@section Using ieee.math_real or ieee.math_complex +@cindex math_real +@cindex math_complex +Contrary to other @samp{ieee} libraries, the math packages sources are not +freely available. The sources provided with GHDL are based on an early draft +and use the C libraries. As a consequence, you should link your design +with the @samp{libm.a} library using the @option{-Wl,} option like: +@smallexample +$ ghdl -e -Wl,-lm my_design +@end smallexample +Please, refer to your system manual for more details. + +Please also note that the @samp{ieee} libraries are not the same as the drafts. + +If you really need the @samp{ieee} math libraries, they are available on the +web, but they cannot be included in GHDL. + +@node Interfacing to other languages, , Using ieee.math_real or ieee.math_complex, GHDL implementation of VHDL @comment node-name, next, previous, up @section Interfacing to other languages @cindex interfacing |