Checking if your kit is complete...
Looks good
Writing Makefile for Lexical::Alias
cp Alias.pm blib/lib/Lexical/Alias.pm
/Users/cpanrun/build/5.10.0/bin/perl /Users/cpanrun/build/5.10.0/lib/ExtUtils/xsubpp  -typemap /Users/cpanrun/build/5.10.0/lib/ExtUtils/typemap  Alias.xs > Alias.xsc && mv Alias.xsc Alias.c
Please specify prototyping behavior for Alias.xs (see perlxs manual)
gcc -c   -fno-common -DPERL_DARWIN -no-cpp-precomp -arch ppc -arch i386 -nostdinc -B/Developer/SDKs/MacOSX10.4u.sdk/usr/include/gcc -B/Developer/SDKs/MacOSX10.4u.sdk/usr/lib/gcc -isystem/Developer/SDKs/MacOSX10.4u.sdk/usr/include -F/Developer/SDKs/MacOSX10.4u.sdk/System/Library/Frameworks -mmacosx-version-min=10.3 -DPRIVLIB_LAST_IN_INC -fno-strict-aliasing -pipe -O3   -DVERSION=\"0.04\" -DXS_VERSION=\"0.04\"  "-I/Users/cpanrun/build/5.10.0/lib/CORE"   Alias.c
Alias.xs: In function 'boot_Lexical__Alias':
Alias.xs:49: error: parse error before ')' token
Alias.xs: In function 'boot_Lexical__Alias':
Alias.xs:49: error: parse error before ')' token
lipo: can't open input file: /var/tmp//cc8Dwx3e.out (No such file or directory)
make: *** [Alias.o] Error 1