PowerPC tools don't build on 32-bit hosts

[Jeff Mayes]

Using RSB and trying to build PowerPC.
Updated RSB just a few days ago.
i386 and arm build successfully, but PowerPC fails.

configure:3662: checking for suffix of object files
configure:3684: /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/xgcc -B/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/ -nostdinc -B/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/powerpc-rtems4.12/me6500/m64/newlib/ -isystem /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/powerpc-rtems4.12/me6500/m64/newlib/targ-include -isystem /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/gcc-7.2.0/newlib/libc/include -B/desk/rtems/powerpc-rtems4.12/bin/ -B/desk/rtems/powerpc-rtems4.12/lib/ -isystem /desk/rtems/powerpc-rtems4.12/include -isystem /desk/rtems/powerpc-rtems4.12/sys-include -mcpu=e6500 -m64 -c -g -O2 conftest.c >&5
Assembler messages:
Fatal error: -a64 unsupported
configure:3688: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "GNU C Runtime Library"
| #define PACKAGE_TARNAME "libgcc"
| #define PACKAGE_VERSION "1.0"
| #define PACKAGE_STRING "GNU C Runtime Library 1.0"
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE_URL "​http://www.gnu.org/software/libgcc/"
| /* end confdefs.h. */
|
| int
| main ()
| {
|
| ;
| return 0;
| }
configure:3702: error: in `/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/powerpc-rtems4.12/me6500/m64/libgcc':
configure:3705: error: cannot compute suffix of object files: cannot compile

[Joel Sherrill]

I have built the tools on two CentOS 7 computers. Jeff was on Cygwin and has successfully built both arm and x86.

[Sebastian Huber]

Please make sure that no previous RTEMS tools are in your $PATH before the build, e.g. delete the previous installation and try it again.

[Sebastian Huber]

Duplicate of #2540.

[Jeff Mayes]

OK. There are no RTEMS tools in my path. I deleted the build folder in my working dir and tried again. I also changed the #PREFIX to use a different directory. It still fails with the same error as reported.

Any other ideas?
Thanks

[Jeff Mayes]

Joel had the idea to see what verbose gcc output showed. This shows the as version used (2.29).

We have checked and my RSB is up to date. Is there any chance 64-bit PowerPC support is disabled in binutils on Cygwin?

+ /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/xgcc -B/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/ -nostdinc -B/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/powerpc-rtems4.12/me6500/m64/newlib/ -isystem /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/powerpc-rtems4.12/me6500/m64/newlib/targ-include -isystem /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/gcc-7.2.0/newlib/libc/include -B/desk/rtems/powerpc/powerpc-rtems4.12/bin/ -B/desk/rtems/powerpc/powerpc-rtems4.12/lib/ -isystem /desk/rtems/powerpc/powerpc-rtems4.12/include -isystem /desk/rtems/powerpc/powerpc-rtems4.12/sys-include -mcpu=e6500 -m64 -c -g -v -O2 conftest.c
Reading specs from /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/specs
COLLECT_GCC=/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/xgcc
Target: powerpc-rtems4.12
Configured with: ../gcc-7.2.0/configure --prefix=/desk/rtems/powerpc --bindir=/desk/rtems/powerpc/bin --exec_prefix=/desk/rtems/powerpc --includedir=/desk/rtems/powerpc/include --libdir=/desk/rtems/powerpc/lib --libexecdir=/desk/rtems/powerpc/libexec --mandir=/desk/rtems/powerpc/share/man --infodir=/desk/rtems/powerpc/share/info --datadir=/desk/rtems/powerpc/share --build=i686-pc-cygwin --host=i686-pc-cygwin --target=powerpc-rtems4.12 --disable-libstdcxx-pch --with-gnu-as --with-gnu-ld --verbose --with-newlib --disable-nls --without-included-gettext --disable-win32-registry --enable-version-specific-runtime-libs --disable-lto --enable-newlib-io-c99-formats --enable-newlib-iconv --enable-newlib-iconv-encodings=big5,cp775,cp850,cp852,cp855,cp866,euc_jp,euc_kr,euc_tw,iso_8859_1,iso_8859_10,iso_8859_11,iso_8859_13,iso_8859_14,iso_8859_15,iso_8859_2,iso_8859_3,iso_8859_4,iso_8859_5,iso_8859_6,iso_8859_7,iso_8859_8,iso_8859_9,iso_ir_111,koi8_r,koi8_ru,koi8_u,koi8_uni,ucs_2,ucs_2_internal,ucs_2be,ucs_2le,ucs_4,ucs_4_internal,ucs_4be,ucs_4le,us_ascii,utf_16,utf_16be,utf_16le,utf_8,win_1250,win_1251,win_1252,win_1253,win_1254,win_1255,win_1256,win_1257,win_1258 --enable-threads --disable-plugin --enable-libgomp --enable-languages=c,c++
Thread model: rtems
gcc version 7.2.0 20170814 (RTEMS 4.12, RSB 55f2d69e9b67cde23d61375fa34ef5b0f04a985d, Newlib 2.5.0.20170818) (GCC) 
COLLECT_GCC_OPTIONS='-B' '/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/' '-nostdinc' '-B' '/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/powerpc-rtems4.12/me6500/m64/newlib/' '-isystem' '/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/powerpc-rtems4.12/me6500/m64/newlib/targ-include' '-isystem' '/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/gcc-7.2.0/newlib/libc/include' '-B' '/desk/rtems/powerpc/powerpc-rtems4.12/bin/' '-B' '/desk/rtems/powerpc/powerpc-rtems4.12/lib/' '-isystem' '/desk/rtems/powerpc/powerpc-rtems4.12/include' '-isystem' '/desk/rtems/powerpc/powerpc-rtems4.12/sys-include' '-mcpu=e6500' '-m64' '-c' '-g' '-v' '-O2'
 /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/cc1.exe -quiet -nostdinc -v -imultilib me6500/m64 -iprefix /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/gcc/../lib/gcc/powerpc-rtems4.12/7.2.0/ -isystem /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/include -isystem /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/include-fixed -D__PPC_CPU_E6500__ -isystem /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/powerpc-rtems4.12/me6500/m64/newlib/targ-include -isystem /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/gcc-7.2.0/newlib/libc/include -isystem /desk/rtems/powerpc/powerpc-rtems4.12/include -isystem /desk/rtems/powerpc/powerpc-rtems4.12/sys-include conftest.c -quiet -dumpbase conftest.c -mcpu=e6500 -m64 -auxbase conftest -g -O2 -version -o /tmp/ccRXH4mo.s
GNU C11 (GCC) version 7.2.0 20170814 (RTEMS 4.12, RSB 55f2d69e9b67cde23d61375fa34ef5b0f04a985d, Newlib 2.5.0.20170818) (powerpc-rtems4.12)
	compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory "/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/powerpc-rtems4.12/me6500/m64/newlib/targ-include"
ignoring nonexistent directory "/desk/rtems/powerpc/powerpc-rtems4.12/include"
ignoring nonexistent directory "/desk/rtems/powerpc/powerpc-rtems4.12/sys-include"
#include "..." search starts here:
#include <...> search starts here:
 /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/include
 /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/include-fixed
 /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/gcc-7.2.0/newlib/libc/include
End of search list.
GNU C11 (GCC) version 7.2.0 20170814 (RTEMS 4.12, RSB 55f2d69e9b67cde23d61375fa34ef5b0f04a985d, Newlib 2.5.0.20170818) (powerpc-rtems4.12)
	compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: c400f821a881560be7012bb91d375b83
COLLECT_GCC_OPTIONS='-B' '/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/' '-nostdinc' '-B' '/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/powerpc-rtems4.12/me6500/m64/newlib/' '-isystem' '/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/powerpc-rtems4.12/me6500/m64/newlib/targ-include' '-isystem' '/opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/gcc-7.2.0/newlib/libc/include' '-B' '/desk/rtems/powerpc/powerpc-rtems4.12/bin/' '-B' '/desk/rtems/powerpc/powerpc-rtems4.12/lib/' '-isystem' '/desk/rtems/powerpc/powerpc-rtems4.12/include' '-isystem' '/desk/rtems/powerpc/powerpc-rtems4.12/sys-include' '-mcpu=e6500' '-m64' '-c' '-g' '-v' '-O2'
 /opt/rtems-tools/rsb/rtems/build/powerpc-rtems4.12-gcc-7.2.0-newlib-2.5.0.20170818-i686-pc-cygwin-1/build/./gcc/as -v -a64 -me6500 -many -mbig -o conftest.o /tmp/ccRXH4mo.s
GNU assembler version 2.29 (powerpc-rtems4.12) using BFD version (GNU Binutils) 2.29
Assembler messages:
Fatal error: -a64 unsupported

[Chris Johns]

The error is happening in as and it would appear the PPC as does not support 64bit options. Does an as Linux build of the PPC support the -a64 option? Hint, use -save-temp to get a .s file and shift it to Linux and try.

I would compare the full build logs for a Linux build and a Cygwin build paying extra attention to the assembler configure and build. I would try and locate a PowerPC 64bit assembler file in the as source and see if it is build on Linux and Cygwin.

[Sebastian Huber]

The BFD configuration is in Binutils bfd/config.bfd:

  powerpc-*-*bsd* | powerpc-*-elf* | powerpc-*-sysv4* | powerpc-*-eabi* | \
  powerpc-*-solaris2* | powerpc-*-linux-* | powerpc-*-rtems* | \
  powerpc-*-chorus*)
    targ_defvec=powerpc_elf32_vec
    targ_selvecs="rs6000_xcoff_vec powerpc_elf32_le_vec powerpc_boot_vec"
    targ64_selvecs="powerpc_elf64_vec powerpc_elf64_le_vec"
    ;;

Looks like some Cygwin-specific build problem to me.

[Jeff Mayes]

With Joel's help, I got it to build today. Here are the changes we made:

jeff@Win7-VM /opt/rtems-tools/rsb/rtems
$ git diff config/tools/rtems-binutils-2.29-1.cfg
diff --git a/rtems/config/tools/rtems-binutils-2.29-1.cfg b/rtems/config/tools/rtems-binutils-2.29-1.cfg
index 6941ebb..87580f8 100644
--- a/rtems/config/tools/rtems-binutils-2.29-1.cfg
+++ b/rtems/config/tools/rtems-binutils-2.29-1.cfg
@@ -20,6 +20,11 @@
 %define with_deterministic_archives 1

 #
+# Enable 64-bit BFD support
+#
+%define with_64_bit_bfd 1
+
+#
 # The binutils build instructions. We use 2.xx Release 1.
 #
 %include %{_configdir}/binutils-2-1.cfg

jeff@Win7-VM /opt/rtems-tools/rsb/rtems
$ git diff ../source-builder/config/binutils-2-1.cfg
diff --git a/source-builder/config/binutils-2-1.cfg b/source-builder/config/binutils-2-1.cfg
index 539f076..0b4101d 100644
--- a/source-builder/config/binutils-2-1.cfg
+++ b/source-builder/config/binutils-2-1.cfg
@@ -70,6 +70,7 @@ BuildRoot: %{_tmppath}/%{name}-root-%(%{__id_u} -n)
     --target=%{_target} \
     --verbose --disable-nls \
     %{?with_deterministic_archives:--enable-deterministic-archives} \
+    %{?with_64_bit_bfd:--enable-64-bit-bfd} \
     %{?with_gold:--enable-gold=yes} \
     %{?with_lto:--enable-lto --enable-plugins}%{!?with_lto:--disable-lto} \
     --without-included-gettext \

[Chris Johns]

Please correct the ticket and:

1. Assign ownership to Joel.
2. Set a milestone
3. Add binutils PowerPC 64bit to the tags

Thanks

What hosts have you tested?

[Joel Sherrill]

No other hosts have been tested. We were happy it worked on Cygwin. If you are ok with the patch, we can test it elsewhere.

[Chris Johns]

Replying to Joel Sherrill:

No other hosts have been tested. We were happy it worked on Cygwin. If you are ok with the patch, we can test it elsewhere.

Patch looks fine with a minor change in the commit to say Enable 64-bit BFD support. Needed on 32bit hosts.. We just need to make sure other hosts are not broken.

[Joel Sherrill]

Testing now on CentOS 7 and Fedora 26 which are 64-bit hosts.

Following up on a comment from Sebastian that I missed. This is not Cygwin specific. It is an issue on all 32-bit hosts. The bfd magic silently disables 64-bit BFD on 32-bit hosts unless you specify --enable-64-bit-bfd. I have not checked yet if sparc64 or aarch64 will build on 32-bit Cygwin. They may need this option also. I will ask Jeff to check if they build. They may need this option also.

[Jeff Mayes]

Just tested aarch64 and sparc64 with the fixed files, and they both build just fine.

[Joel Sherrill <joel.sherrill@…>]

In c4b6bf0/rtems-source-builder:

Enable 64-bit BFD support. Needed on 32bit hosts

Closes #3157.

[Sebastian Huber]

Milestone renamed