[Buildroot] [git commit branch/2021.05.x] package/libressl: depend on threads

[Buildroot] [git commit branch/2021.05.x] package/libressl: depend on threads

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=4c26b80d9af27ea2904e643809ece23cdd76fd43
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2021.05.x

If the toolchain does not have threads (e.g. br-arm-full-nothread),
compilation fails:

In file included from /home/fail/br-test-pkg/br-arm-full-nothread/build/libressl-3.3.3/crypto/cryptlib.c:117:
/home/fail/br-test-pkg/br-arm-full-nothread/build/libressl-3.3.3/crypto/../include/compat/pthread.h:114:15: fatal error: pthread.h: No such file or directory
  114 | #include_next <pthread.h>
      |               ^~~~~~~~~~~
compilation terminated.

Signed-off-by: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit da8f069d745de73fb5810c21b2896ff173fa6090)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
 package/openssl/Config.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/openssl/Config.in b/package/openssl/Config.in
index f79bac28fa..7bf49b05f6 100644
--- a/package/openssl/Config.in
+++ b/package/openssl/Config.in
@@ -33,6 +33,7 @@ source "package/libopenssl/Config.in"
 config BR2_PACKAGE_LIBRESSL
 	bool "libressl"
 	depends on !BR2_PACKAGE_OPENSSL_FORCE_LIBOPENSSL
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	# uClibc on noMMU doesn't provide __register_atfork()
 	depends on !(BR2_TOOLCHAIN_USES_UCLIBC && !BR2_USE_MMU)
 	help
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