libffi build failure under superenv on Mac OS X 10.5.8, Xcode 3.1.4

01.configure

checking build system type... powerpc-apple-darwin9.8.0
checking host system type... powerpc-apple-darwin9.8.0
checking target system type... powerpc-apple-darwin9.8.0
continue configure in default builddir "./powerpc-apple-darwin9.8.0"
....exec /bin/sh .././configure "--srcdir=.." "--enable-builddir=powerpc-apple-darwin9.8.0" "darwin9.8.0"
checking build system type... powerpc-apple-darwin9.8.0
checking host system type... powerpc-apple-darwin9.8.0
checking target system type... powerpc-apple-darwin9.8.0
checking for gsed... sed
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... ../install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking for gcc... cc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether cc accepts -g... yes
checking for cc option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of cc... none
checking dependency style of cc... none
checking whether cc understands -c and -o together... yes
checking how to print strings... printf
checking for a sed that does not truncate output... /usr/local/Library/ENV/3.1.4/sed
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for fgrep... /usr/bin/grep -F
checking for ld used by cc... /usr/libexec/gcc/powerpc-apple-darwin9/4.2.1/ld
checking if the linker (/usr/libexec/gcc/powerpc-apple-darwin9/4.2.1/ld) is GNU ld... no
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -p
checking the name lister (/usr/bin/nm -p) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 196608
checking whether the shell understands some XSI constructs... yes
checking whether the shell understands "+="... yes
checking how to convert powerpc-apple-darwin9.8.0 file names to powerpc-apple-darwin9.8.0 format... func_convert_file_noop
checking how to convert powerpc-apple-darwin9.8.0 file names to toolchain format... func_convert_file_noop
checking for /usr/libexec/gcc/powerpc-apple-darwin9/4.2.1/ld option to reload object files... -r
checking for objdump... no
checking how to recognize dependent libraries... pass_all
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for ar... ar
checking for archiver @FILE support... no
checking for strip... strip
checking for ranlib... ranlib
checking command to parse /usr/bin/nm -p output from cc object... ok
checking for sysroot... no
checking for mt... no
checking if : is a manifest tool... no
checking for dsymutil... dsymutil
checking for nmedit... nmedit
checking for lipo... lipo
checking for otool... otool
checking for otool64... no
checking for -single_module linker flag... yes
checking for -exported_symbols_list linker flag... yes
checking for -force_load linker flag... ld: unknown option: -force_load
no
checking how to run the C preprocessor... cc -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if cc supports -fno-rtti -fno-exceptions... no
checking for cc option to produce PIC... -fno-common -DPIC
checking if cc PIC flag -fno-common -DPIC works... yes
checking if cc static flag -static works... no
checking if cc supports -c -o file.o... yes
checking if cc supports -c -o file.o... (cached) yes
checking whether the cc linker (/usr/libexec/gcc/powerpc-apple-darwin9/4.2.1/ld) supports shared libraries... yes
checking dynamic linker characteristics... darwin9.8.0 dyld
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking size of size_t... 4
checking for C compiler vendor... gnu
checking whether C compiler accepts -fstrict-aliasing... yes
checking whether C compiler accepts -ffast-math... yes
checking for gcc architecture flag... 
checking whether C compiler accepts -march=7450... no
checking whether C compiler accepts -mcpu=7450... yes
checking for gcc architecture flag... -mcpu=7450
checking whether C compiler accepts -O3 -fomit-frame-pointer -fstrict-aliasing -ffast-math -mcpu=7450... yes
checking CFLAGS for maximum warnings... -Wall
checking whether to enable maintainer-specific portions of Makefiles... no
checking sys/mman.h usability... yes
checking sys/mman.h presence... yes
checking for sys/mman.h... yes
checking for mmap... yes
checking for sys/mman.h... (cached) yes
checking for mmap... (cached) yes
checking whether read-only mmap of a plain file works... yes
checking whether mmap from /dev/zero works... no
checking for MAP_ANON(YMOUS)... yes
checking whether mmap with MAP_ANON(YMOUS) works... yes
checking for ANSI C header files... (cached) yes
checking for memcpy... yes
checking for size_t... yes
checking for working alloca.h... yes
checking for alloca... yes
checking size of double... 8
checking size of long double... 16
checking whether byte ordering is bigendian... yes
checking assembler .cfi pseudo-op support... no
checking whether .eh_frame section should be read-only... expr: syntax error
no
checking for __attribute__((visibility("hidden")))... no
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating include/Makefile
config.status: creating include/ffi.h
config.status: creating Makefile
config.status: creating testsuite/Makefile
config.status: creating man/Makefile
config.status: creating libffi.pc
config.status: creating fficonfig.h
config.status: linking ../src/powerpc/ffitarget.h to include/ffitarget.h
config.status: executing buildir commands
config.status: create top_srcdir/Makefile guessed from local Makefile
config.status: buggy sed found - it deletes tab in "a" text parts
config.status: build in powerpc-apple-darwin9.8.0 (HOST=)
config.status: executing depfiles commands
config.status: executing libtool commands
config.status: executing include commands
config.status: executing src commands

02.make

MAKE powerpc-apple-darwin9.8.0 :        0 * install
Making install in include
make[3]: Nothing to be done for `install-exec-am'.
 ../../install-sh -c -d '/usr/local/Cellar/libffi/3.0.13/lib/libffi-3.0.13/include'
 /usr/bin/install -c -m 644 ffi.h ffitarget.h '/usr/local/Cellar/libffi/3.0.13/lib/libffi-3.0.13/include'
Making install in testsuite
make[3]: Nothing to be done for `install-exec-am'.
make[3]: Nothing to be done for `install-data-am'.
Making install in man
make[3]: Nothing to be done for `install-exec-am'.
 ../../install-sh -c -d '/usr/local/Cellar/libffi/3.0.13/share/man/man3'
 /usr/bin/install -c -m 644 ../../man/ffi.3 ../../man/ffi_call.3 ../../man/ffi_prep_cif.3 ../../man/ffi_prep_cif_var.3 '/usr/local/Cellar/libffi/3.0.13/share/man/man3'
/bin/sh ./libtool --tag=CC   --mode=compile cc -DHAVE_CONFIG_H -I. -I..  -I. -I../include -Iinclude -I../src   -O3 -fomit-frame-pointer -fstrict-aliasing -ffast-math -mcpu=7450  -Wall -fexceptions -c -o src/prep_cif.lo ../src/prep_cif.c
libtool: compile:  cc -DHAVE_CONFIG_H -I. -I.. -I. -I../include -Iinclude -I../src -O3 -fomit-frame-pointer -fstrict-aliasing -ffast-math -mcpu=7450 -Wall -fexceptions -c ../src/prep_cif.c  -fno-common -DPIC -o src/.libs/prep_cif.o
brew: superenv removed: -O3 -Wall
cc1: error: unrecognized command line option "-mcpu=7450"
cc1: error: unrecognized command line option "-mcpu=7450"
lipo: can't open input file: /var/folders/Mh/MhjBrfxwFNCuaVXO90bF3U+++TM/-Tmp-//ccKyrlFo.out (No such file or directory)
make[2]: *** [src/prep_cif.lo] Error 1
make[1]: *** [install-recursive] Error 1
make: *** [install] Error 2

HOMEBREW_VERSION: 0.9.4
HEAD: 705b04e20559299f35b7911e9d8075944b8c90a8
CPU: single-core 32-bit g4e
OS X: 10.5.8-Power Macintosh
Xcode: 3.1.4
X11: 2.1.6 => /usr/X11