[Bug bootstrap/39388] New: trunk revision 144629 - Multilibs missing

[Bug bootstrap/39388] New: trunk revision 144629 - Multilibs missing

[rob1weld at aol dot com]

In trunk revision 144629 there is a large size discrepancy of _installed_ 
gcc depending on first part of triplet when building Multi-lib which is
neither explained by size of executables nor differencing of the directories.


To reproduce (on Debian Lenny 5.0):


1. Boot 32-Bit using Grub entry "Debian GNU/Linux, kernel 2.6.xx-i386":

2. Configure and build gcc like this:

# gcc/xgcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc_trunk/configure --prefix=/mnt/drive2/gcc_installed
--enable-languages=c,ada,c++,fortran,java,objc,obj-c++ --enable-multilib
--disable-stage1-checking --enable-checking=release --with-gmp=/usr/local
--with-mpfr=/usr/local


3. Boot 64-Bit using Grub entry "Debian GNU/Linux, kernel 2.6.xx-amd64":

4. Configure and build gcc like this:

# gcc/xgcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc_trunk/configure --prefix=/mnt/drive2/gcc_installed_64
--enable-languages=c,ada,c++,fortran,java,objc,obj-c++ --enable-multilib
--disable-stage1-checking --enable-checking=release --with-gmp=/usr/local
--with-mpfr=/usr/local


5. Note that only the "--prefix" (and Boot Mode) is changed. Now
check the sizes on the installed directories, see a BIG difference:

# du -ah /mnt/drive2/gcc_build/ | tail -1
2.4G

# du -ah /mnt/drive2/gcc_installed/ | tail -1
541M

# du -ah /mnt/drive2/gcc_build_64/ | tail -1
3.9G    /mnt/drive2/gcc_build_64/

# du -ah /mnt/drive2/gcc_installed_64/ | tail -1
931M    /mnt/drive2/gcc_installed_64/


6. Check why the installed sizes are so different:

# find /mnt/drive2/gcc_installed/ | sort > list_gcc_installed.txt

# find /mnt/drive2/gcc_installed_64/ | sort > list_gcc_installed_64.txt

# diff -Naur list_gcc_installed.txt list_gcc_installed_64.txt >
list_gcc_installed_32vs64.txt


7. Now use Gedit (or other editor) to match up the directories and
check why the sizes are so different. It seems that even though
we use "--enable-multilib" we do not build the same alternate
libraries in both Modes, we are lazier in the 32-Bit Mode.


8. The result is this:

When we build gcc, with the OS in the 64-Bit Boot Mode, we also 
build a couple of "32" directories (but not others that maybe we 
should build).

When we build gcc, with the OS in the 32-Bit Boot Mode, we fail
to build some "64" directories and this results in an incomplete
"Multilib-version" of gcc.


I am not confused that a few more features are available in one Boot 
Mode or the other, nor that the size of the executables are going to 
be different, this has been taken into consideration.

I examined the 'diffs' and see that we are building a 
"x86_64-pc-linux-gnu/32/bits" directory but no corresponding
"i686-pc-linux-gnu/64/bits" directory.

I examined the 'diffs' and see that we are building a 
"x86_64-pc-linux-gnu/4.4.0/32" directory but no corresponding
"i686-pc-linux-gnu/4.4.0/32" directory.


The "x86_64-pc-linux-gnu/4.4.0/32/" directory ONLY contains:
"x86_64-pc-linux-gnu/4.4.0/32/adainclude/*"
"x86_64-pc-linux-gnu/4.4.0/32/adalib/*"
"x86_64-pc-linux-gnu/4.4.0/32/crt*"         and these _few_ files:
"x86_64-pc-linux-gnu/4.4.0/32/libgcc.a"
"x86_64-pc-linux-gnu/4.4.0/32/libgcc_eh.a"
"x86_64-pc-linux-gnu/4.4.0/32/libgcov.a"
"x86_64-pc-linux-gnu/4.4.0/32/libgfortranbegin.a"
"x86_64-pc-linux-gnu/4.4.0/32/libgfortranbegin.la"

where are the rest (of the libraries and alternate directories)
for the multilibs on Platform "i686-pc-linux-gnu" ?

See the attachment.

Rob


-- 
           Summary: trunk revision 144629 - Multilibs missing
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rob1weld at aol dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39388

[Bug bootstrap/39388] trunk revision 144629 - Multilibs missing

[rob1weld at aol dot com]

------- Comment #1 from rob1weld at aol dot com  2009-03-05 22:23 -------
Created an attachment (id=17402)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17402&action=view)
Edited diff of comparison between Multilibs produced


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39388

[Bug bootstrap/39388] trunk revision 144629 - Multilibs missing

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2009-04-16 20:45 -------
"first part of triplet"

if you want a multi-targeted i386 compiler, use --enable-targets=.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|major                       |normal
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39388