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make.adb: Add missing documentation for multilib handling. 

2009-09-07  Laurent GUERBY  <laurent@guerby.net>

        * make.adb: Add missing documentation for multilib handling.

From-SVN: r151473
This commit is contained in:
Laurent GUERBY 2009-09-07 09:00:51 +00:00 committed by Laurent Guerby
parent 7717df30b1
commit e9491f468a
2 changed files with 25 additions and 2 deletions
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4
gcc/ada/ChangeLog
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@ -1,3 +1,7 @@
2009-09-07 Laurent GUERBY <laurent@guerby.net>
* make.adb: Add missing documentation for multilib handling.
2009-09-03 Diego Novillo <dnovillo@google.com>
* gcc-interface/misc.c (lang_hooks): Remove const qualifier.

23
gcc/ada/make.adb
View File

@ -7296,8 +7296,14 @@ package body Make is
begin
pragma Assert (N_M_Switch > 0 and RTS_Specified = null);
-- This loop needs commenting ??? In fact this entire body is
-- under-commented ??? And the spec is not much help :-(
-- In case we detected a multilib switch and the user has not
-- manually specified a specific RTS we emulate the following command:
-- gnatmake $FLAGS --RTS=$(gcc -print-multi-directory $FLAGS)
-- First select the flags which might have an impact on multilib
-- processing. Note that this is an heuristic selection and it
-- will need to be maintained over time. The condition has to
-- be kept synchronized with N_M_Switch counting in Scan_Make_Arg.
for Next_Arg in 1 .. Argument_Count loop
declare
@ -7322,6 +7328,10 @@ package body Make is
Args (Args'Last) := new String'("-print-multi-directory");
-- Call the GCC driver with the collected flags and save its
-- output. Alternate design would be to link in gnatmake the
-- relevant part of the GCC driver.
if Saved_Gcc /= null then
Multilib_Gcc := Saved_Gcc;
else
@ -7344,6 +7354,8 @@ package body Make is
return;
end if;
-- Parse the GCC driver output which is a single line, removing CR/LF
Output_FD := Open_Read (Output_Name.all, Binary);
if Output_FD = Invalid_FD then
@ -7362,10 +7374,14 @@ package body Make is
end if;
end loop;
-- In case the standard RTS is selected do nothing
if N_Read = 0 or else Line (1 .. N_Read) = "." then
return;
end if;
-- Otherwise add -margs --RTS=output
Scan_Make_Arg ("-margs", And_Save => True);
Scan_Make_Arg ("--RTS=" & Line (1 .. N_Read), And_Save => True);
end Process_Multilib;
@ -7845,6 +7861,9 @@ package body Make is
Add_Switch (Argv, Compiler, And_Save => And_Save);
Add_Switch (Argv, Linker, And_Save => And_Save);
-- The following condition has to be kept synchronized with
-- the Process_Multilib one.
if Argv (2) = 'm'
and then Argv /= "-mieee"
then