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[tor-commits] [tor/maint-0.2.4] Give an #error when we want threads and OpenSSL has disabled threads



commit fdafe11a25ad3e7ca8893c8630f86973431217b9
Author: Nick Mathewson <nickm@xxxxxxxxxxxxxx>
Date:   Mon Mar 11 13:23:10 2013 -0400

    Give an #error when we want threads and OpenSSL has disabled threads
    
    Fixes ticket 6673.
---
 changes/bug6673     |    4 ++++
 src/common/crypto.c |    6 ++++++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/changes/bug6673 b/changes/bug6673
new file mode 100644
index 0000000..506b449
--- /dev/null
+++ b/changes/bug6673
@@ -0,0 +1,4 @@
+  o Minor features (build):
+    - Detect and reject attempts to build Tor with threading support
+      when OpenSSL have been compiled with threading support disabled.
+      Fixes bug 6673.
diff --git a/src/common/crypto.c b/src/common/crypto.c
index 22d57c7..3d8b1ba 100644
--- a/src/common/crypto.c
+++ b/src/common/crypto.c
@@ -3000,6 +3000,12 @@ memwipe(void *mem, uint8_t byte, size_t sz)
 }
 
 #ifdef TOR_IS_MULTITHREADED
+
+#ifndef OPENSSL_THREADS
+#error OpenSSL has been built without thread support. Tor requires an \
+ OpenSSL library with thread support enabled.
+#endif
+
 /** Helper: OpenSSL uses this callback to manipulate mutexes. */
 static void
 openssl_locking_cb_(int mode, int n, const char *file, int line)



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