i get eror messages when building opensll on xen such as: ./include/openssl/bio.h:63:20: stdio.h: No such file or directory In file included from cryptlib.h:69, from cryptlib.c:61: ../include/openssl/bio.h:512: error: syntax error before '*' token In file included from cryptlib.h:70, from cryptlib.c:61: ../include/openssl/err.h:63:19: stdio.h: No such file or directory ../include/openssl/err.h:64:20: stdlib.h: No such file or directory In file included from ../include/openssl/err.h:71, from cryptlib.h:70, from cryptlib.c:61: ../include/openssl/lhash.h:67:19: stdio.h: No such file or directory In file included from ../include/openssl/err.h:71, from cryptlib.h:70, from cryptlib.c:61: ../include/openssl/lhash.h:184: error: syntax error before "FILE" ../include/openssl/lhash.h:185: error: syntax error before "FILE" ../include/openssl/lhash.h:186: error: syntax error before "FILE" In file included from cryptlib.h:70, from cryptlib.c:61: ../include/openssl/err.h:84:19: errno.h: No such file or directory In file included from cryptlib.h:70, from cryptlib.c:61: ../include/openssl/err.h:265: error: syntax error before '*' token cryptlib.c: In function `CRYPTO_thread_id': cryptlib.c:381: warning: implicit declaration of function `getpid' cryptlib.c: In function `OpenSSLDie': cryptlib.c:512: warning: implicit declaration of function `fprintf' cryptlib.c:512: error: `stderr' undeclared (first use in this function) cryptlib.c:512: error: (Each undeclared identifier is reported only once cryptlib.c:512: error: for each function it appears in.) cryptlib.c:515: warning: implicit declaration of function `abort' make[2]: *** [cryptlib.o] Error 1 make[2]: Leaving directory `/usr/src/openssl-0.9.7e/crypto' make[1]: *** [sub_all] Error 1 make[1]: Leaving directory `/usr/src/openssl-0.9.7e' make: *** [build] Error 2 so i thought to install libc6-dev but then i get this error message The following packages have unmet dependencies: libc6-dev: Depends: libc6 (= 2.3.2.ds1-22sarge4) but 2.3.2.xen-22 is to be installed E: Broken packages any ideas please radox