openssl-0.9.8g makedepend 'warnings' -- *are* these a problem?

i'm building openssl-0.9.8g from src on osx 10.5.2,

        uname -a
                Darwin sc.local 9.2.2 Darwin Kernel Version 9.2.2: Tue Mar  4
21:23:43 PST 2008; root:xnu-1228.4.31~1/RELEASE_PPC Power Macintosh


i configure, as i always have,

        ./Configure \
        --prefix=/usr/local/ssl --openssldir=/usr/local/ssl \
        darwin-ppc-cc -DUSE_TOD threads shared \
        enable-idea enable-rc5 enable-mdc2 \
        -L/usr/local/lib zlib

'Configure' completes without error, but

        make depend

reports a bunch of 'warnings',

        making depend in crypto...
        makedepend: warning:  cannot open "ppc"
        makedepend: warning:  cryptlib.c (reading /usr/include/stdarg.h, line
4): cannot find include file "stdarg.h"
        making depend in crypto/objects...
        ../../util/domd ../.. -MD makedepend -- -fPIC -fno-common
-DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN
-DHAVE_DLFCN_H -DUSE_TOD -arch ppc -O3 -DB_ENDIAN -I.. -I../..
-I../../include -DOPENSSL_NO_DEPRECATED -DOPENSSL_NO_CAMELLIA
-DOPENSSL_NO_GMP -DOPENSSL_NO_RFC3779 -DOPENSSL_NO_SEED
-DOPENSSL_NO_TLSEXT  --  o_names.c obj_dat.c obj_lib.c obj_err.c
        makedepend: warning:  cannot open "ppc"
        makedepend: warning:  o_names.c (reading /usr/include/stdarg.h, line
4): cannot find include file "stdarg.h"
        making depend in crypto/md2...
        ../../util/domd ../.. -MD makedepend -- -fPIC -fno-common
-DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN
-DHAVE_DLFCN_H -DUSE_TOD -arch ppc -O3 -DB_ENDIAN -I.. -I../..
-I../../include -DOPENSSL_NO_DEPRECATED -DOPENSSL_NO_CAMELLIA
-DOPENSSL_NO_GMP -DOPENSSL_NO_RFC3779 -DOPENSSL_NO_SEED
-DOPENSSL_NO_TLSEXT  --  md2_dgst.c md2_one.c
        makedepend: warning:  cannot open "ppc"
        makedepend: warning:  md2_one.c (reading /usr/include/stdarg.h, line
4): cannot find include file "stdarg.h"
        making depend in crypto/md4...
        ../../util/domd ../.. -MD makedepend -- -fPIC -fno-common
-DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN
-DHAVE_DLFCN_H -DUSE_TOD -arch ppc -O3 -DB_ENDIAN -I.. -I../..
-I../../include -DOPENSSL_NO_DEPRECATED -DOPENSSL_NO_CAMELLIA
-DOPENSSL_NO_GMP -DOPENSSL_NO_RFC3779 -DOPENSSL_NO_SEED
-DOPENSSL_NO_TLSEXT  --  md4_dgst.c md4_one.c
        makedepend: warning:  cannot open "ppc"
        ...
        makedepend: warning:  e_4758cca.c (reading /usr/include/stdarg.h,
line 4): cannot find include file "stdarg.h"
        making depend in apps...
        makedepend: warning:  cannot open "ppc"
        makedepend: warning:  openssl.c (reading /usr/include/stdarg.h, line
4): cannot find include file "stdarg.h"
        making depend in test...
        makedepend: warning:  cannot open "ppc"
        makedepend: warning:  bntest.c (reading /usr/include/stdarg.h, line
4): cannot find include file "stdarg.h"
        making depend in tools...
        make[1]: Nothing to be done for `depend'.

but completes without an "Error".

nonetheless, those warnings don't look healthy ...

are they a problem? if so, what to fix?

thanks!