[Bug other/43847] New: gcc_cv_objdump pointing to wrong one in gcc/configure

[Bug other/43847] New: gcc_cv_objdump pointing to wrong one in gcc/configure

[kai dot ruottu at wippies dot com]

The code in 'gcc-4.5.0/gcc/configure' :

-------------------- clip -----------------------------------
pluginlibs=
if test x"$enable_plugin" = x"yes"; then

  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for exported symbols" >&5
$as_echo_n "checking for exported symbols... " >&6; }
  echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
  ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
  if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
    : # No need to use a flag
  else
    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -rdynamic" >&5
$as_echo_n "checking for -rdynamic... " >&6; }
    ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null
2>&1
    if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
      pluginlibs="-rdynamic"
    else
      enable_plugin=no
    fi
  fi
-------------------- clip -----------------------------------

will cause an error when the $target-objdump doesn't understand the $host
binaries like :

-------------------- clip -----------------------------------
Links are now set up to build a cross-compiler
from x86_64-unknown-linux-gnu to arm-unknown-elf.
checking for exported symbols...
/usr/local/cross-gcc-arm-elf-4.5.0/arm-elf/bin/objdump:
conftest: File format not recognized
checking for -rdynamic...
/usr/local/cross-gcc-arm-elf-4.5.0/arm-elf/bin/objdump:
conftest: File format not recognized
-------------------- clip -----------------------------------

The host GCC (CC) compiles and links a program and then the executable
will be looked with 'objdump' ($gcc_cv_objdump). But the latter is now
pointing to the target one!


-- 
           Summary: gcc_cv_objdump pointing to wrong one in gcc/configure
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kai dot ruottu at wippies dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43847

[Bug bootstrap/43847] test for plugin is using wrong objdump for host != target

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2010-04-22 16:54 -------
Actually gcc_cv_objdump is correct for the rest of configure.ac; just we are
using the incorrect one for the plugin test.

Also note we need to use the one for built for the build for the host.  (for
Canadian crosses).


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
          Component|other                       |bootstrap
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-04-22 16:54:18
               date|                            |
            Summary|gcc_cv_objdump pointing to  |test for plugin is using
                   |wrong one in gcc/configure  |wrong objdump for host !=
                   |                            |target


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43847

[Bug bootstrap/43847] test for plugin is using wrong objdump for host != target

[doko at ubuntu dot com]

------- Comment #2 from doko at ubuntu dot com  2010-06-04 09:51 -------
having an objdump which supports both the host and the target works around this
issue.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43847

[Bug bootstrap/43847] test for plugin is using wrong objdump for host != target

[doko at ubuntu dot com]

------- Comment #3 from doko at ubuntu dot com  2010-06-08 08:35 -------
proposed patch at
http://gcc.gnu.org/ml/gcc-patches/2010-06/msg00658.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43847

[Bug bootstrap/43847] test for plugin is using wrong objdump for host != target

[doko at gcc dot gnu dot org]

------- Comment #4 from doko at gcc dot gnu dot org  2010-09-09 18:23 -------
Subject: Bug 43847

Author: doko
Date: Thu Sep  9 18:22:48 2010
New Revision: 164113

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=164113
Log:
2010-09-09  Matthias Klose  <doko@ubuntu.com>

        PR bootstrap/43847
        * configure.ac (--enable-plugin): Enhance for cross builds.
        * configure: Regenerate.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/configure
    trunk/gcc/configure.ac


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43847

[Bug bootstrap/43847] test for plugin is using wrong objdump for host != target

[doko at gcc dot gnu dot org]

------- Comment #5 from doko at gcc dot gnu dot org  2010-09-09 18:25 -------
Subject: Bug 43847

Author: doko
Date: Thu Sep  9 18:25:26 2010
New Revision: 164114

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=164114
Log:
2010-09-09  Matthias Klose  <doko@ubuntu.com>

        PR bootstrap/43847
        * configure.ac (--enable-plugin): Enhance for cross builds.
        * configure: Regenerate.

Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/configure
    branches/gcc-4_5-branch/gcc/configure.ac


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43847