fsplib fails to build on 10.6.8 with Clang: libfsplib.a(fsplib.o) malformed object (unknown load command 2)

[barracuda156]

/opt/local/bin/clang-mp-11 -arch x86_64 -o test.o -c -Wall -W -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Wbad-function-cast -Wcast-qual -Wcast-align -Wwrite-strings -Waggregate-return -Wmissing-declarations -Wmissing-format-attribute -Wnested-externs -ggdb -fno-common -Wchar-subscripts -Wcomment -Wimplicit -Wsequence-point -Wreturn-type -Wfloat-equal -Wno-system-headers -Wredundant-decls -Wmissing-noreturn -pedantic -Wlong-long -Wundef -Winline -Wpointer-arith -Wno-unused-parameter -Wno-cast-align -DHAVE_DIRENT_NAMLEN -DHAVE_DIRENT_FILENO -DHAVE_DIRENT_TYPE -DHAVE_STDINT_H -DFSP_USE_SHAREMEM_AND_SEMOP test.c
ar rc libfsplib.a fsplib.o lock.o
/usr/bin/ranlib: object: libfsplib.a(fsplib.o) malformed object (unknown load command 2)
ar: internal ranlib command failed
scons: *** [libfsplib.a] Error 1
scons: building terminated because of errors.
Command failed:  cd "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_fsplib/fsplib/work/fsplib-0.14" && /opt/local/bin/scons -j8 CC="/opt/local/bin/clang-mp-11 -arch x86_64" 
Exit code: 2

​https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/153458/steps/install-port/logs/stdio

GCC build for ppc is okay.

[kencu (Ken)]

the system cctools on 10.6 is too old to understand the build products of new clangs.

macports cctools must be used instead, as it is current.