If explicit_bzero() is not available (e.g.: with uClibc) build fails because of: ell/cert.c: In function ‘cert_key_from_pkcs8_encrypted_private_key_info’: ell/cert.c:665:2: warning: implicit declaration of function ‘explicit_bzero’ [-Wimplicit-function-declaration] 665 | explicit_bzero(decrypted, data_len); | ^~~~~~~~~~~~~~ in spite of correct detection: checking for explicit_bzero... no and: ... /* Define to 1 if you have the `explicit_bzero' function. */ /* #undef HAVE_EXPLICIT_BZERO */ ... Fix is adding `#include "missing.h"` as it is done in simila files. Signed-off-by: Mauro Condarelli <mc5686(a)mclink.it&gt; --- ell/cert.c | 1 + 1 file changed, 1 insertion(+) diff --git a/ell/cert.c b/ell/cert.c index c26051f..b54c7b1 100644 --- a/ell/cert.c +++ b/ell/cert.c @@ -33,6 +33,7 @@ #include "pem-private.h" #include "cert.h" #include "cert-private.h" +#include "missing.h" #define X509_CERTIFICATE_POS 0 #define X509_TBSCERTIFICATE_POS 0 -- 2.25.1