[Bug other/20955] New: Top-level gcc configure/makefile does not handle --with-sysroot

[Bug other/20955] New: Top-level gcc configure/makefile does not handle --with-sysroot

[prothonotar at tarnation dot dyndns dot org]

The top-level gcc configure currently only passes the "--with-sysroot" to the
subdirectories, and of these, the "gcc" subdir seems to be the only one that
uses it. When I was configuring with languages c and c++, this meant that the
libstdc++ package would not build, because it couldn't find my native libraries
and headers that I had specified with --with-sysroot. The alternative (use
--with-headers and --with-libs) would disrupt my file hiearchy too much
(basically I grab all the necessary libs and headers from the native system
as-is, meaning most of the libraries are symlinks, which are not dereferenced by
gcc's make when using --with-libs). 

It turns out that this is relatively easy to fix. The top-level configure sets
the xgcc options to add "-B%{build_tooldir}/lib/  -isystem
$(build_tooldir)/include -isystem $(build_tooldir)/sys-include". These are
hard-coded, even if you use --with-sysroot. By altering configure to be 'sysroot
aware', I changed the options to "-B$(target_sysroot)/lib
-B$(target_sysroot)/usr/lib -isystem $(target_sysroot)/usr/include" (where
target_sysroot is the sysroot), and did a rebuild (from scratch) and everything
worked. I'll attach my patch below.

-- 
           Summary: Top-level gcc configure/makefile does not handle --with-
                    sysroot
           Product: gcc
           Version: 3.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: prothonotar at tarnation dot dyndns dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: sparc-sun-solaris2.8
  GCC host triplet: sparc-sun-solaris2.8
GCC target triplet: i586-sun-solaris2.10


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[prothonotar at tarnation dot dyndns dot org]

------- Additional Comments From prothonotar at tarnation dot dyndns dot org  2005-04-11 20:16 -------
Created an attachment (id=8598)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8598&action=view)
Modifies top-level configure and Makefile.in to support sysroot

I modified the configure script directly because I didn't feel like running
autoconf over everything. Obviously a real fix would be to modify configure.in.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-11 20:17 -------
Can you attach the full log, because I know people have built cross compilers before with --with-
sysroot and they worked.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-11 20:18 -------
Also --with-sysroot should set up the sysroot inside GCC itself so you don't need the flags you are 
adding.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-11 20:20 -------
In fact the code in gcc.c does this for you so your patch does not makes sense.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[prothonotar at tarnation dot dyndns dot org]

------- Additional Comments From prothonotar at tarnation dot dyndns dot org  2005-04-11 20:32 -------
Created an attachment (id=8599)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8599&action=view)
Log showing complete configure->build failure in libstdc++

As requested, here is my log. As for your other comments, all I can say is that
a vanilla build failed for me, and it succeeded after my patch...

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-11 20:35 -------
Can you attach the config.log from libstdc++ subdirectory since that is where the failure should show 
up?


checking for wcslen... configure: error: Link tests are not allowed after GCC_NO_EXECUTABLES.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[prothonotar at tarnation dot dyndns dot org]

------- Additional Comments From prothonotar at tarnation dot dyndns dot org  2005-04-11 20:35 -------
Apologies for the verbose log... I was using a build script :-/

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[prothonotar at tarnation dot dyndns dot org]

------- Additional Comments From prothonotar at tarnation dot dyndns dot org  2005-04-11 20:39 -------
One more note about the log: the failures in libstdc++'s configure are because
the options to xgcc (passed from the top-level makefile) are as I stated in my
original comment. I don't have the config.log anymore since I've performed
several clean/rebuild cycles since the time I did this build.

If you really need them though, I can fire off another build without my patch
when I get a chance.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[drow at false dot org]

------- Additional Comments From drow at false dot org  2005-04-12 00:06 -------
Subject: Re:  Top-level gcc configure/makefile does not handle --with-sysroot

On Mon, Apr 11, 2005 at 08:39:53PM -0000, prothonotar at tarnation dot dyndns dot org wrote:
> 
> ------- Additional Comments From prothonotar at tarnation dot dyndns dot org  2005-04-11 20:39 -------
> One more note about the log: the failures in libstdc++'s configure are because
> the options to xgcc (passed from the top-level makefile) are as I stated in my
> original comment. I don't have the config.log anymore since I've performed
> several clean/rebuild cycles since the time I did this build.
> 
> If you really need them though, I can fire off another build without my patch
> when I get a chance.

The normal cause of this is that GCC thinks your sysroot has been
relocated to be somewhere relative to the build directory, because of
how it is being run.

It tests whether the relocated path exists.  In this case, it does,
because your sysroot is the same as $prefix/$target, gcc is in
$build/gcc/, and $build/$target/ exists.

Maybe we should only do this if the components stripped off are the
same as those we expect, i.e. if we are looking for
$prefix/bin/../$target only succeed if the binary is in a directory
named bin.

As a workaround, name your sysroot directory something else...



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[drow at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |drow at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[prothonotar at tarnation dot dyndns dot org]

------- Additional Comments From prothonotar at tarnation dot dyndns dot org  2005-04-12 12:50 -------
Let me see if I understand your advice: I should try moving the sysroot to
something like $prefix/solaris-x86 instead of $prefix/i586-sun-solaris2.10,
because gcc is getting confused between the target name, a directory in
gcc-build that has the name of the target, and the system root directory that I
have chosen? This is because xgcc is being run from the build dir rather than
the installation dir, I take it?

I'll try the workaround, and report back.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[drow at gcc dot gnu dot org]

------- Additional Comments From drow at gcc dot gnu dot org  2005-04-12 12:53 -------
Subject: Re:  Top-level gcc configure/makefile does not handle --with-sysroot

On Tue, Apr 12, 2005 at 12:50:29PM -0000, prothonotar at tarnation dot dyndns dot org wrote:
> 
> ------- Additional Comments From prothonotar at tarnation dot dyndns dot org  2005-04-12 12:50 -------
> Let me see if I understand your advice: I should try moving the sysroot to
> something like $prefix/solaris-x86 instead of $prefix/i586-sun-solaris2.10,
> because gcc is getting confused between the target name, a directory in
> gcc-build that has the name of the target, and the system root directory that I
> have chosen? This is because xgcc is being run from the build dir rather than
> the installation dir, I take it?

Exactly right.  When installed, libraries and some binutils binaries go
in $prefix/$target/; when building, multilib builddirs go in
$objdir/$target/.



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[prothonotar at tarnation dot dyndns dot org]

------- Additional Comments From prothonotar at tarnation dot dyndns dot org  2005-04-12 22:21 -------
Presto, that did the trick. No need to muck with configure. Thanks. Feel free to
close this if desired.

BTW, this bugzilla is set up to top-post additional comments, which is a little
frustrating. :)

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-13 22:42 -------
(In reply to comment #12)
> Presto, that did the trick. No need to muck with configure. Thanks. Feel free to
> close this if desired.

Ok, closing as such.
 
> BTW, this bugzilla is set up to top-post additional comments, which is a little
> frustrating. :)

You can click, can't you. Oh, well.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |WONTFIX


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[drow at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |drow at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2005-04-14 03:10:36
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[drow at gcc dot gnu dot org]

------- Additional Comments From drow at gcc dot gnu dot org  2005-04-14 03:10 -------
Actually, we can and should fix this.  What I gave was only a workaround.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|WONTFIX                     |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[drow at gcc dot gnu dot org]

------- Additional Comments From drow at gcc dot gnu dot org  2005-04-14 03:11 -------
I'll look at it when I can find the time.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |minor
           Priority|P2                          |P3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955

[Bug other/20955] Top-level gcc configure/makefile does not handle --with-sysroot

[drow at gcc dot gnu dot org]

------- Comment #16 from drow at gcc dot gnu dot org  2007-01-28 03:48 -------
Actually, I was wrong - we shouldn't try to make this case work.  If you use
$prefix/$target_alias as a sysroot, then /bin/as in your sysroot needs to be a
host-x-target assembler!

Closing instead.


-- 

drow at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20955