[Bug bootstrap/56601] New: OpenBSD lto-plugin fails to use

[Bug bootstrap/56601] New: OpenBSD lto-plugin fails to use

[mail@waldemar-brodkorb.de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56601

             Bug #: 56601
           Summary: OpenBSD lto-plugin fails to use
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mail@waldemar-brodkorb.de


Hi,

I am using OpenBSD 5.2 amd64 and try to use OpenWrt to build a cross-compiler.
This works fine on FreeBSD/Darwin and Linux, but fails on OpenBSD with
following
error message:

arm-openwrt-linux-uclibcgnueabi-gcc: fatal error: -fuse-linker-plugin, but
liblto_plugin.so not found
compilation terminated.

Indeed a liblto_plugin.so is not build, instead there is liblto_plugin.so.0.0

gmake[5]: Entering directory
`/home/wbx/openwrt/build_dir/toolchain-arm_v6k_gcc-
4.7.2_uClibc-0.9.33.2_eabi/gcc-4.7.2-initial/lto-plugin'
gmake[6]: Entering directory
`/home/wbx/openwrt/build_dir/toolchain-arm_v6k_gcc-
4.7.2_uClibc-0.9.33.2_eabi/gcc-4.7.2-initial/lto-plugin'
test -z
"/home/wbx/openwrt/staging_dir/toolchain-arm_v6k_gcc-4.7.2_uClibc-0.9.33
.2_eabi/initial/libexec/gcc/arm-openwrt-linux-uclibcgnueabi/4.7.2" ||
/usr/local
/bin/gmkdir -p
"/home/wbx/openwrt/staging_dir/toolchain-arm_v6k_gcc-4.7.2_uClibc
-0.9.33.2_eabi/initial/libexec/gcc/arm-openwrt-linux-uclibcgnueabi/4.7.2"
 /bin/sh ./libtool --tag=disable-static  --mode=install /usr/bin/install -c  
li
blto_plugin.la
'/home/wbx/openwrt/staging_dir/toolchain-arm_v6k_gcc-4.7.2_uClibc
-0.9.33.2_eabi/initial/libexec/gcc/arm-openwrt-linux-uclibcgnueabi/4.7.2'
libtool: install: /usr/bin/install -c .libs/liblto_plugin.so.0.0
/home/wbx/openw
rt/staging_dir/toolchain-arm_v6k_gcc-4.7.2_uClibc-0.9.33.2_eabi/initial/libexec/
gcc/arm-openwrt-linux-uclibcgnueabi/4.7.2/liblto_plugin.so.0.0
libtool: install: /usr/bin/install -c .libs/liblto_plugin.lai
/home/wbx/openwrt/
staging_dir/toolchain-arm_v6k_gcc-4.7.2_uClibc-0.9.33.2_eabi/initial/libexec/gcc
/arm-openwrt-linux-uclibcgnueabi/4.7.2/liblto_plugin.la
libtool: install: warning: remember to run `libtool --finish
/home/wbx/openwrt/s
taging_dir/toolchain-arm_v6k_gcc-4.7.2_uClibc-0.9.33.2_eabi/libexec/gcc/arm-open
wrt-linux-uclibcgnueabi/4.7.2'

gcc is configured:
(cd
/home/wbx/openwrt/build_dir/toolchain-arm_v6k_gcc-4.7.2_uClibc-0.9.33.2_eabi/gcc-4.7.2-minimal
&& rm -f config.cache; SHELL="/usr/local/bin/bash"
/home/wbx/openwrt/build_dir/toolchain-arm_v6k_gcc-4.7.2_uClibc-0.9.33.2_eabi/gcc-4.7.2/configure
--prefix=/home/wbx/openwrt/staging_dir/toolchain-arm_v6k_gcc-4.7.2_uClibc-0.9.33.2_eabi
--build=amd64-unknown-openbsd5.2 --host=amd64-unknown-openbsd5.2
--target=arm-openwrt-linux-uclibcgnueabi --with-gnu-ld --enable-target-optspace
--disable-libgomp --disable-libmudflap --disable-multilib --disable-nls 
--with-host-libstdcxx=-lstdc++      
--with-gmp=/home/wbx/openwrt/staging_dir/host
--with-mpfr=/home/wbx/openwrt/staging_dir/host --disable-decimal-float
--disable-libssp --disable-__cxa_atexit --with-arch=armv6k --with-newlib
--without-headers --enable-languages=c --disable-libssp --disable-shared
--disable-threads );

Complete build log is attached.

Any idea what goes wrong here?

Creating a symlink doesn't help.

thanks in advance for any hint.
 Waldemar

[Bug bootstrap/56601] OpenBSD lto-plugin fails to use

[mail@waldemar-brodkorb.de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56601

--- Comment #1 from mail@waldemar-brodkorb.de 2013-03-12 09:55:47 UTC ---
Build log is here
http://www.waldemar-brodkorb.de/log

[Bug bootstrap/56601] OpenBSD lto-plugin fails to use

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56601

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2013-03-12
     Ever Confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-12 10:01:43 UTC ---
GCC doesn't find LTOPLUGINSONAME in the set of exec prefix paths.  That's
created from the config.host entry for host_lto_plugin_soname which is
liblto_plugin.so by default.

Add -v to the command to see which paths are searched for executables
(and the plugin).  Trace the driver with strace to see which files
it tries to open (yes, you do need the symlink).  Also make sure the
plugin is readable/executable by you.

Note that you need the plugin for the _host_, not sure if we messed up
things for cross-compilers (I never tried LTO with a cross ...)

[Bug bootstrap/56601] OpenBSD lto-plugin fails to use

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56601

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-12 10:19:43 UTC ---
Seems to work for me with a quick test targeting arm-linux-gnueabi

[Bug bootstrap/56601] OpenBSD lto-plugin fails to use

[mail@waldemar-brodkorb.de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56601

--- Comment #4 from mail@waldemar-brodkorb.de 2013-03-12 10:25:23 UTC ---
Hi,

thanks for the fast response.
I ktrace't the driver and the log is here:
http://www.waldemar-brodkorb.de/kdump

30611 arm-openwrt-linu NAMI 
"/home/wbx/openwrt/staging_dir/toolchain-arm_v6k_gcc-4.7.2_uClibc-0.9.33.2_eabi/libexec/gcc/arm-openwrt-linux-uclibcgnueabi/4.7.2/liblto_plugin.so"

It searches not in the source directory. That was my mistake. 

Creating the symlinks in staging_dir does help.

So where does it creates the wrong filename? 

thanks
 Waldemar

[Bug bootstrap/56601] OpenBSD lto-plugin fails to use

[mail@waldemar-brodkorb.de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56601

--- Comment #5 from mail@waldemar-brodkorb.de ---
Hi,

following change fixed it for me:

diff -Nur gcc-4.7.3.orig/gcc/config.host gcc-4.7.3/gcc/config.host
--- gcc-4.7.3.orig/gcc/config.host      Tue Oct 18 08:14:14 2011
+++ gcc-4.7.3/gcc/config.host   Tue Jan  7 04:33:29 2014
@@ -292,6 +292,9 @@
     out_host_hook_obj=host-solaris.o
     host_xmake_file="${host_xmake_file} x-solaris"
     ;;
+  *-*-openbsd*)
+    host_lto_plugin_soname=liblto_plugin.so.0.0
+    ;;
   *-*-linux*)
     out_host_hook_obj=host-linux.o
     host_xmake_file="${host_xmake_file} x-linux"

[Bug target/56601] OpenBSD lto-plugin fails to use

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56601

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to mail from comment #5)
> Hi,
> 
> following change fixed it for me:

That is obvious not the correct fix. I suspect this is a libtool issue ....

[Bug lto/56601] OpenBSD lto-plugin fails to use

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56601

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|target                      |lto
             Status|WAITING                     |UNCONFIRMED
                 CC|                            |marxin at gcc dot gnu.org
     Ever confirmed|1                           |0