[Bug bootstrap/57059] New: Host configuration of loose_warn breaks for build components for Canadian crosses

[Bug bootstrap/57059] New: Host configuration of loose_warn breaks for build components for Canadian crosses

[rmansfield at qnx dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57059

             Bug #: 57059
           Summary: Host configuration of loose_warn breaks for build
                    components for Canadian crosses
    Classification: Unclassified
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: rmansfield@qnx.com


When the building a canadian cross with a build compiler that is gcc 4.6 or
older, the build cannot compile the build tools as configure will detect that
the cross compiler has support for -Wno-narrowing, and will try to pass it
along in the BUILD_CXXFLAGS. e.g.

g++ -c    -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long
-Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H -DGENERATOR_FILE
-I. -Ibuild -I../../gcc -I../../gcc/build -I../../gcc/../include
-I../../gcc/../libcpp/include  -I../../gcc/../libdecnumber
-I../../gcc/../libdecnumber/dpd -I../libdecnumber -I../../gcc/../libbacktrace  
 \
        -o build/genconstants.o ../../gcc/genconstants.c
cc1plus: error: unrecognized command line option "-Wno-narrowing"
make[3]: *** [build/genconstants.o] Error 1

$ grep acx_cv_prog_cc_warning__Wnarrowing gcc/config.log
acx_cv_prog_cc_warning__Wnarrowing=yes

[Bug bootstrap/57059] [4.8/4.9 Regression] Host configuration of loose_warn breaks for build components for Canadian crosses

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57059

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
            Version|4.9.0                       |4.8.0
           Keywords|                            |build
   Last reconfirmed|                            |2013-04-24
     Ever Confirmed|0                           |1
            Summary|Host configuration of       |[4.8/4.9 Regression] Host
                   |loose_warn breaks for build |configuration of loose_warn
                   |components for Canadian     |breaks for build components
                   |crosses                     |for Canadian crosses
   Target Milestone|---                         |4.8.1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2013-04-24 18:37:06 UTC ---
Confirmed.  I ran into this also but with 4.8.0.

[Bug bootstrap/57059] [4.8/4.9 Regression] Host configuration of loose_warn breaks for build components for Canadian crosses

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57059

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |chris at contemporary dot net.au

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 57282 has been marked as a duplicate of this bug. ***

[Bug bootstrap/57059] [4.8/4.9 Regression] Host configuration of loose_warn breaks for build components for Canadian crosses

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57059

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.8.1                       |4.8.2

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 4.8.1 has been released.

[Bug bootstrap/57059] [4.8/4.9 Regression] Host configuration of loose_warn breaks for build components for Canadian crosses

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57059

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.8.2                       |4.8.3

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 4.8.2 has been released.

[Bug bootstrap/57059] [4.8/4.9 Regression] Host configuration of loose_warn breaks for build components for Canadian crosses

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57059

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2

[Bug bootstrap/57059] [4.8/4.9/4.10 Regression] Host configuration of loose_warn breaks for build components for Canadian crosses

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57059

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.8.3                       |4.8.4

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 4.8.3 is being released, adjusting target milestone.

[Bug bootstrap/57059] [4.8/4.9/5 Regression] Host configuration of loose_warn breaks for build components for Canadian crosses

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57059

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.8.4                       |4.8.5

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 4.8.4 has been released.

[Bug bootstrap/57059] [4.8/4.9/5 Regression] Host configuration of loose_warn breaks for build components for Canadian crosses

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57059

Aldy Hernandez <aldyh at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aldyh at gcc dot gnu.org

--- Comment #7 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
I can't reproduce this on mainline.

I'm building:

/source/gcc/configure --host=ppc64-linux --target=i386-elf
--build=x86-64-linux-gnu

I am cheating with the cross tools by setting links to native compilers to
speed up the process.  My x86-64 build compilers are 4.6 based (gcc, g++,
x86-64-unknown-linux-gnu-gcc, etc in the list below) and do not have support
for -Wnarrowing.  My cross compiler is ppc64-linux-g* which is the system
compiler and supports -Wnarrowing:

-rwxr-xr-x. 4 aldyh aldyh 1027379 Mar 11 08:16 c++
-rwxr-xr-x. 1 aldyh aldyh 1024943 Mar 11 08:16 cpp
-rwxr-xr-x. 4 aldyh aldyh 1027379 Mar 11 08:16 g++
-rwxr-xr-x. 3 aldyh aldyh 1022232 Mar 11 08:16 gcc
-rwxr-xr-x. 1 aldyh aldyh  135016 Mar 11 08:16 gcov
lrwxrwxrwx. 1 aldyh aldyh      11 Mar 11 09:36 ppc64-linux-ar -> /usr/bin/ar
lrwxrwxrwx. 1 aldyh aldyh      11 Mar 11 09:36 ppc64-linux-as -> /usr/bin/as
lrwxrwxrwx. 1 aldyh aldyh      12 Mar 11 09:51 ppc64-linux-g++ -> /usr/bin/g++
lrwxrwxrwx. 1 aldyh aldyh      12 Mar 11 09:51 ppc64-linux-gcc -> /usr/bin/gcc
lrwxrwxrwx. 1 aldyh aldyh      11 Mar 11 09:36 ppc64-linux-ld -> /usr/bin/ld
lrwxrwxrwx. 1 aldyh aldyh      11 Mar 11 09:36 ppc64-linux-nm -> /usr/bin/nm
lrwxrwxrwx. 1 aldyh aldyh      16 Mar 11 09:36 ppc64-linux-objcopy ->
/usr/bin/objcopy
lrwxrwxrwx. 1 aldyh aldyh      16 Mar 11 09:36 ppc64-linux-objdump ->
/usr/bin/objdump
lrwxrwxrwx. 1 aldyh aldyh      15 Mar 11 09:36 ppc64-linux-ranlib ->
/usr/bin/ranlib
lrwxrwxrwx. 1 aldyh aldyh      16 Mar 11 09:36 ppc64-linux-readelf ->
/usr/bin/readelf
lrwxrwxrwx. 1 aldyh aldyh      14 Mar 11 09:36 ppc64-linux-strip ->
/usr/bin/strip
-rwxr-xr-x. 4 aldyh aldyh 1027379 Mar 11 08:16 x86_64-unknown-linux-gnu-c++
-rwxr-xr-x. 4 aldyh aldyh 1027379 Mar 11 08:16 x86_64-unknown-linux-gnu-g++
-rwxr-xr-x. 3 aldyh aldyh 1022232 Mar 11 08:16 x86_64-unknown-linux-gnu-gcc
-rwxr-xr-x. 3 aldyh aldyh 1022232 Mar 11 08:16
x86_64-unknown-linux-gnu-gcc-4.6.4

# build compiler with no support for -Wnarrowing:
reynosa:/build/gcc46/install/bin$ gcc -c -Wnarrowing a.c
cc1: error: unrecognized command line option ‘-Wnarrowing’

# cross compiler with support for -Wnarrowing:
reynosa:/build/gcc46/install/bin$ ppc64-linux-gcc -c -Wnarrowing a.c
reynosa:/build/gcc46/install/bin$ 

I see the GCC configury correctly determining that -Wnarrowing is available for
the cross compiler:

[gcc/config.log]
configure:6367: checking whether ppc64-linux-gcc supports -Wnarrowing
configure:6384: ppc64-linux-gcc -c -Wnarrowing  conftest.c >&5
configure:6384: $? = 0
configure:6393: result: yes
...
...
acx_cv_prog_cc_warning__Wnarrowing=yes

However, building build/genconstants.o with the x86-64-linux 4.6 compiler does
not use -Wno-narrowing, and is being compiled correctly:

g++ -c -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE   -DGENERATOR_FILE -I. -Ibuild
-I/s
ource/gcc/gcc -I/source/gcc/gcc/build -I/source/gcc/gcc/../include 
-I/source/gc
c/gcc/../libcpp/include  \
        -o build/genconstants.o /source/gcc/gcc/genconstants.c

Further in the build process, the cross compiler is being used correctly, but
this time with -Wno-narrowing as expected:

ppc64-linux-g++ -c  -DIN_GCC_FRONTEND -g -O2 -DIN_GCC 
-DCROSS_DIRECTORY_STRUCTURE  -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common 
-DHAVE_CONFIG_H -I. -Ic -I/source/gcc/gcc -I/source/gcc/gcc/c
-I/source/gcc/gcc/../include -I/source/gcc/gcc/../libcpp/include 
-I/source/gcc/gcc/../libdecnumber -I/source/gcc/gcc/../libdecnumber/dpd
-I../libdecnumber -I/source/gcc/gcc/../libbacktrace   -o c/c-parser.o -MT
c/c-parser.o -MMD -MP -MF c/.deps/c-parser.TPo /source/gcc/gcc/c/c-parser.c

This was last confirmed by Andrew Pinski on 4.8.  I am inclined to remove this
as a regression on GCC 5.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/62173] [5 Regression] 64bit Arch can't ivopt while 32bit Arch can
Date: Wed, 11 Mar 2015 17:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idb173

--- Comment #34 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Any progress on this?  This is a P1 PR, but no comments have been added for
more than a month...

[Bug bootstrap/57059] [4.8/4.9/5 Regression] Host configuration of loose_warn breaks for build components for Canadian crosses

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57059

Aldy Hernandez <aldyh at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #8 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Aha, this is no longer reproducible on neither 4.8 nor the 4.9 branch.  It was
fixed for 4.9, and backported to the 4.8 branch with r205803:

commit b1009c8da943bcfe84455313dff13dfbd998bd57
Author: amodra <amodra@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Mon Dec 9 11:30:39 2013 +0000

    2013-12-09  Alan Modra  <amodra@gmail.com>

        Apply from mainline
        2013-12-05  Alan Modra  <amodra@gmail.com>
        * configure.ac (BUILD_CXXFLAGS) Don't use ALL_CXXFLAGS for
        build != host.
        <recursive call for build != host>: Clear GMPINC.  Don't bother
        saving CFLAGS.
        * configure: Regenerate.

    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_8-branch@205803
138bc75d-0d04-0410-961f-82ee72b054a4

Closed as fixed everywhere.  Yeehaw.