gcc.texi: Document recommend means to provide software floating point libraries in libgcc.a

        * gcc.texi: Document recommend means to provide software floating
        point libraries in libgcc.a

From-SVN: r28565

gcc/ChangeLog

+Fri Aug  6 23:08:44 1999  Jeffrey A Law  (law@cygnus.com)
+
+	* gcc.texi: Document recommend means to provide software floating
+	point libraries in libgcc.a
+
 1999-08-06  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* c-lex.c (yylex): We can have a number with no digits.

gcc/gcc.texi

@@ -3929,6 +3929,29 @@ Compiler flags to use when compiling @file{libgcc2.c}.
 A list of source file names to be compiled or assembled and inserted
 into @file{libgcc.a}.
 
+@findex Floating Point Emulation
+@item Floating Point Emulation
+To have GCC include software floating point libraries in @file{libgcc.a}
+define @code{FPBIT} and @code{DPBIT} along with a few rules as follows:
+@smallexample
+# We want fine grained libraries, so use the new code to build the
+# floating point emulation libraries.
+FPBIT = fp-bit.c
+DPBIT = dp-bit.c
+
+
+fp-bit.c: $(srcdir)/config/fp-bit.c
+        echo '#define FLOAT' > fp-bit.c
+        cat $(srcdir)/config/fp-bit.c >> fp-bit.c
+
+dp-bit.c: $(srcdir)/config/fp-bit.c
+        cat $(srcdir)/config/fp-bit.c > dp-bit.c
+@end smallexample
+
+You may need to provide additional #defines at the beginning of @file{fp-bit.c}
+and @file{dp-bit.c} to control target endianness and other options.
+
+
 @findex CRTSTUFF_T_CFLAGS
 @item CRTSTUFF_T_CFLAGS
 Special flags used when compiling @file{crtstuff.c}.