libmpc: changed to also build a shared library and also hardcoding the library path for gmp and mpfr

scientific/libmpc/libmpc.conf

@@ -16,10 +16,15 @@ if atstage toolchain; then
 	# help to find the correct gmp libraries and headers
 	var_append extraconfopt ' ' "--with-gmp-include=$( pkgprefix -r includedir gmp )"
 	var_append extraconfopt ' ' "--with-gmp-lib=$( pkgprefix -r libdir gmp )"
+	# hardcode gmp library path
+	var_append LDFLAGS ' ' "-Wl,-rpath,$( pkgprefix -r libdir gmp )"
 
 	# help to find the correct mpfr library and headers
 	var_append extraconfopt ' ' "--with-mpfr-include=$( pkgprefix -r includedir mpfr )"
 	var_append extraconfopt ' ' "--with-mpfr-lib=$( pkgprefix -r libdir mpfr )"
+	# hardcode mpfr library path
+	var_append LDFLAGS ' ' "-Wl,-rpath,$( pkgprefix -r libdir mpfr )"
 
-	var_append extraconfopt ' ' "--enable-shared=no"
+	# pass the extra LDFLAGS
+	var_append configprefix ' ' 'LDFLAGS="$LDFLAGS"'
 fi