[Buildroot] [git commit] package/libevent: fix build with libressl >= 3.5.0

[Buildroot] [git commit] package/libevent: fix build with libressl >= 3.5.0

[Arnout Vandecappelle]

commit: https://git.buildroot.net/buildroot/commit/?id=e01f3fc602e25ae5f336137b91eda9b05a6802ff
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

Fix the following build failure with libressl raised since bump to
version 3.5.2 in commit 8b216927db080b38fdbf1f8b025b6f90a89d4bc2:

In file included from bufferevent_openssl.c:68:
bufferevent_openssl.c: In function 'bio_bufferevent_free':
openssl-compat.h:44:28: error: invalid use of incomplete typedef 'BIO' {aka 'struct bio_st'}
   44 | #define BIO_get_init(b) (b)->init
      |                            ^~
bufferevent_openssl.c:124:7: note: in expansion of macro 'BIO_get_init'
  124 |   if (BIO_get_init(b) && BIO_get_data(b))
      |       ^~~~~~~~~~~~

Fixes:
 - http://autobuild.buildroot.org/results/273f9aa354a08ef3af6140b8dec086408bf5d574

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
---
 ...on-t-define-BIO_get_init-for-LibreSSL-3-5.patch | 29 ++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/package/libevent/0001-Don-t-define-BIO_get_init-for-LibreSSL-3-5.patch b/package/libevent/0001-Don-t-define-BIO_get_init-for-LibreSSL-3-5.patch
new file mode 100644
index 0000000000..33c349b11d
--- /dev/null
+++ b/package/libevent/0001-Don-t-define-BIO_get_init-for-LibreSSL-3-5.patch
@@ -0,0 +1,29 @@
+From 883630f76cbf512003b81de25cd96cb75c6cf0f9 Mon Sep 17 00:00:00 2001
+From: Theo Buehler <tb@openbsd.org>
+Date: Sun, 21 Nov 2021 21:38:20 +0100
+Subject: [PATCH] Don't define BIO_get_init() for LibreSSL 3.5+
+
+BIO_get_init() is available in LibreSSL 3.5 and later. The BIO type
+will become opaque, so the existing macro will break the build.
+
+[Retrieved from:
+https://github.com/libevent/libevent/commit/883630f76cbf512003b81de25cd96cb75c6cf0f9]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ openssl-compat.h | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/openssl-compat.h b/openssl-compat.h
+index a23e34251b..f5de25539f 100644
+--- a/openssl-compat.h
++++ b/openssl-compat.h
+@@ -40,7 +40,8 @@ static inline BIO_METHOD *BIO_meth_new(int type, const char *name)
+ #endif /* (OPENSSL_VERSION_NUMBER < 0x10100000L) || \
+ 	(defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x20700000L) */
+ 
+-#if defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER >= 0x20700000L
++#if defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER >= 0x20700000L && \
++	LIBRESSL_VERSION_NUMBER < 0x30500000L
+ #define BIO_get_init(b) (b)->init
+ #endif
+ 
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