Run the non-default configs tests only with gcc.

.travis.yml

@@ -1,35 +1,32 @@
 language: c
-os:
-  - linux
-  - osx
-env:
-  - PATH=./racket/bin:$PATH
-  - PATH=./racket/bin:$PATH RACKET_CONFIGURE_ARGS="--disable-places --disable-futures --disable-extflonum"
-  - PATH=./racket/bin:$PATH RACKET_CONFIGURE_ARGS="--disable-jit"
-  - PATH=./racket/bin:$PATH RACKET_CONFIGURE_ARGS="--disable-jit --disable-places --disable-futures --disable-extflonum"
-compiler:
-  - gcc
-  - clang
 matrix:
-  exclude:
+  include:
+    # osx, defaults, gcc and clang
     - os: osx
+      compiler: gcc
+      env: PATH=./racket/bin:$PATH
+    - os: osx
+      compiler: clang
+      env: PATH=./racket/bin:$PATH
+    # linux, defaults, gcc and clang
+    - os: linux
+      compiler: gcc
+      env: PATH=./racket/bin:$PATH
+    - os: linux
+      compiler: clang
+      env: PATH=./racket/bin:$PATH
+    # linux, no places, no futures, no extflonum, gcc
+    - os: linux
       compiler: gcc
       env: PATH=./racket/bin:$PATH RACKET_CONFIGURE_ARGS="--disable-places --disable-futures --disable-extflonum"
-    - os: osx
+    # linux, no jit, gcc
-      compiler: clang
+    - os: linux
-      env: PATH=./racket/bin:$PATH RACKET_CONFIGURE_ARGS="--disable-places --disable-futures --disable-extflonum"
-    - os: osx
       compiler: gcc
       env: PATH=./racket/bin:$PATH RACKET_CONFIGURE_ARGS="--disable-jit"
-    - os: osx
+    # linux, no jit, no places, no futures, no extflonum, gcc
-      compiler: clang
+    - os: linux
-      env: PATH=./racket/bin:$PATH RACKET_CONFIGURE_ARGS="--disable-jit"
-    - os: osx
       compiler: gcc
       env: PATH=./racket/bin:$PATH RACKET_CONFIGURE_ARGS="--disable-jit --disable-places --disable-futures --disable-extflonum"
-    - os: osx
-      compiler: clang
-      env: PATH=./racket/bin:$PATH RACKET_CONFIGURE_ARGS="--disable-jit --disable-places --disable-futures --disable-extflonum"
 # Just run tests for the core
 script:
   - make CPUS="2" PKGS="racket-test db-test unstable-flonum-lib net-test" CONFIGURE_ARGS_qq="$RACKET_CONFIGURE_ARGS"
@@ -50,8 +47,8 @@ script:
   - raco test -l tests/db/all-tests
 notifications:
   irc: "chat.freenode.net#racket-dev"
-  email: 
+  email:
-    recipients: 
+    recipients:
       - samth@racket-lang.org
       - robby@racket-lang.org
     on_success: change