gmp configure failure for ppc on 10.6.8 (Rosetta)

[barracuda156]

Complains about assembler:

checking if the assembler needs r on registers... configure: error: neither "mtctr 6" nor "mtctr r6" works
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.2.1" && ./configure --prefix=/opt/local --enable-cxx --host=powerpc750-apple-darwin10.8.0 
Exit code: 1
Error: Failed to configure gmp: consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.2.1/config.log
Error: Failed to configure gmp: configure failure: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gmp/gmp/main.log for details.

[barracuda156]

UPD: This is certainly Macports doing something wrong, since the source configures with zero errors and builds through completion otherwise (with some warnings, please check attachments below).

I used this to configure:

./configure --prefix=/opt/local --enable-cxx --build=powerpc-apple-darwin10 --host=powerpc-apple-darwin10 --target=powerpc-apple-darwin10 --with-ld=/usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/ld --with-as=/usr/bin/as CC='gcc-4.2 -m32 -arch ppc' CXX='g++-4.2 -m32 -arch ppc'

(In fact ld and as went unrecognized, but that did not affect the build.)

[barracuda156]

Warnings when building outside Macports

[barracuda156]

Basically using this in port file and "commenting" everything below makes gmp build:

set configure_cc_save   ${configure.cc}

configure.args-append       CC_FOR_BUILD="gcc-4.2 -arch ppc -m32" \
                            CXX_FOR_BUILD="g++-4.2 -arch ppc -m32" \
                            --build=powerpc-apple-darwin10 \
                            --host=powerpc-apple-darwin10 \
                            --target=powerpc-apple-darwin10

Perhaps an ugly solution, so I am planning to rebuild it after getting feedback here, hopefully.

[barracuda156]

Good news, the latest update of gmp makes the fix redundant: ​https://github.com/macports/macports-ports/commit/43fc13d3e82f99ed563c4564cc6946ed75e75674

I am not sure, however, that the choice made by configure is appropriate (given Rosetta):

checking build system type... powerpc7400-apple-darwin10.8.0
checking host system type... powerpc750-apple-darwin10

[MarcusCalhoun-Lopez (Marcus Calhoun-Lopez)]

If the current version of GMP works, then I will close this.
If the concerns about

checking build system type... powerpc7400-apple-darwin10.8.0
checking host system type... powerpc750-apple-darwin10

case any errors, we can reopen.