git-compat-util: really support openssl as a source of entropy
05cd988dce5 (wrapper: add a helper to generate numbers from a CSPRNG,
2022-01-17), configure openssl as the source for entropy in NON-STOP
but doesn't add the needed header or link options.
Since the only system that is configured to use openssl as a source
of entropy is NON-STOP, add the header unconditionally, and -lcrypto
to the list of external libraries.
An additional change is required to make sure a NO_OPENSSL=1 build
will be able to work as well (tested on Linux with a modified value
of CSPRNG_METHOD = openssl), and the more complex logic that allows
for compatibility with APPLE_COMMON_CRYPTO or allowing for simpler
ways to link (without libssl) has been punted for now.
Reported-by: Randall Becker <rsbecker@nexbridge.com>
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/git-compat-util.h b/git-compat-util.h
index 50597c7..f439f26 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -521,6 +521,10 @@ void warning_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
#include <openssl/x509v3.h>
#endif /* NO_OPENSSL */
+#ifdef HAVE_OPENSSL_CSPRNG
+#include <openssl/rand.h>
+#endif
+
/*
* Let callers be aware of the constant return value; this can help
* gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
