Don't check for libcrypto if we don't have openssl/crypto.h.

[tcpdump] / configure.in

diff --git a/configure.in b/configure.in
index a629559ed1cbe2a61b2682a59fdcab445b2b8d1c..abb4c0ebeff81421377dba070e965bdce855823e 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -1112,8 +1112,19 @@ AC_ARG_WITH(crypto,
        AC_MSG_RESULT([yes, if available])
 ])
 if test "$want_libcrypto" != "no"; then
-       AC_CHECK_LIB(crypto, DES_cbc_encrypt)
-       AC_CHECK_HEADERS(openssl/evp.h)
+       #
+       # If we don't have the header, no point in checking the
+       # library.
+       #
+       # Yes, there are OSes that provide the library but not
+       # the header.  (I'm looking at *you*, recent versions of
+       # OS X/macOS.)
+       #
+       AC_CHECK_HEADERS(openssl/crypto.h,
+       [
+               AC_CHECK_LIB(crypto, DES_cbc_encrypt)
+               AC_CHECK_HEADERS(openssl/evp.h)
+       ])
 fi
 
 # Check for libcap-ng