[tor-commits] [tor/maint-0.2.4] Be explicit that we want not only nacl but nacl-with-a-fast-curve25519

[nickm@xxxxxxxxxxxxxx]

commit 10fb3398087133add9aff93740aff8f818edf242
Author: Nick Mathewson <nickm@xxxxxxxxxxxxxx>
Date:   Fri Mar 15 10:48:33 2013 -0400

    Be explicit that we want not only nacl but nacl-with-a-fast-curve25519
    
    Resolves the user experience part of #8014.
---
 changes/bug8014 |    5 +++++
 configure.ac    |    4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/changes/bug8014 b/changes/bug8014
new file mode 100644
index 0000000..c09a860
--- /dev/null
+++ b/changes/bug8014
@@ -0,0 +1,5 @@
+  o Minor usability improvements (build):
+    - Clarify that when autconf is checking for nacl, it is checking
+      specifically for nacl with a fast curve25519 implementation.
+      Fixes bug 8014.
+
diff --git a/configure.ac b/configure.ac
index 4bc0db3..d588984 100644
--- a/configure.ac
+++ b/configure.ac
@@ -693,7 +693,7 @@ if test x$enable_curve25519 != xno; then
   AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
                     nacl/crypto_scalarmult_curve25519.h])
 
-  AC_CACHE_CHECK([whether we can use curve25519 from nacl],
+  AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
     tor_cv_can_use_curve25519_nacl,
     [tor_saved_LIBS="$LIBS"
      LIBS="$LIBS -lnacl"
@@ -705,7 +705,7 @@ if test x$enable_curve25519 != xno; then
 	 #include <nacl/crypto_scalarmult_curve25519.h>
 	 #endif
          #ifdef crypto_scalarmult_curve25519_ref_BYTES
-	 #error Hey, this is the reference implementation!
+	 #error Hey, this is the reference implementation! That's not fast.
 	 #endif
        ], [
 	 unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);

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