Merge branch 'ticket27252-029' into ticket27252-032

This commit is already implemented in 0.3.2 and later:
- Travis: Skip a duplicate hardening-off build in Tor 0.2.9

.travis.yml

@@ -70,9 +70,17 @@ matrix:
     ## Clang doesn't work in containerized builds, see below.
     - compiler: clang
       sudo: false
-    ## We also exclude non-containerized gcc, because they're slow and redundant.
+    ## Non-containerized gcc are slow and redundant.
     - compiler: gcc
       sudo: required
+    ## gcc on OSX is less useful, because the default compiler is clang.
+    - compiler: gcc
+      os: osx
+    ## gcc on Linux with no env is redundant, because all the custom builds use
+    ## gcc on Linux
+    - compiler: gcc
+      os: linux
+      env:
 
 ## We don't need sudo. (The "apt:" stanza after this allows us to not need
 ## sudo; otherwise, we would need it for getting dependencies.)

changes/ticket27252

@@ -0,0 +1,6 @@
+  o Minor features (continuous integration):
+    - Skip gcc on OSX in Travis CI, it's rarely used.
+      Skip a duplicate hardening-off build in Travis on Tor 0.2.9.
+      Skip gcc on Linux with default settings, because all the non-default
+      builds use gcc on Linux.
+      Implements ticket 27252.