install.texi (sparc-sun-solaris2*): Document required configure settings on Solaris 7 and later.

	* doc/install.texi (sparc-sun-solaris2*): Document required
	configure settings on Solaris 7 and later.

From-SVN: r95117

gcc/ChangeLog

+2005-02-16  Eric Botcazou  <ebotcazou@libertysurf.fr>
+
+	* doc/install.texi (sparc-sun-solaris2*): Document required
+	configure settings on Solaris 7 and later.
+
 2005-02-16  Diego Novillo  <dnovillo@redhat.com>
 
 	PR tree-optimization/19865

gcc/doc/install.texi

@@ -3596,6 +3596,14 @@ ld: warning: relocation error: R_SPARC_UA32: @dots{}
 To work around this problem, compile with @option{-gstabs+} instead of
 plain @option{-g}.
 
+When configuring the GNU Multiple Precision Library (GMP) on a Solaris 7
+or later system, the canonical target triplet must be specified as the
+@command{build} parameter on the configure line:
+
+@smallexample
+./configure --build=sparc-sun-solaris2.7 --prefix=xxx --enable-mpfr
+@end smallexample
+
 @html
 <hr />
 @end html