From 438620e832fcfc506acefd623623277601e88357 Mon Sep 17 00:00:00 2001
From: Bernhard Nortmann <bernhard.nortmann@web.de>
Date: Wed, 4 May 2016 10:08:29 +0200
Subject: [PATCH] travis-ci: Extend build matrix, disable email notifications

We'll be testing both gcc and clang builds on Linux. As for now,
Travis CI only supports clang for OSX - so exclude gcc currently.

Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>
---
 .travis.yml | 14 ++++++++++++++
 Makefile    |  2 +-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index d276863..84b8b7f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,16 @@ language: c
 os:
   - linux
   - osx
+compiler:
+  - gcc
+  - clang
+
+# OSX uses Apple's flavor of clang anyway, so there's no point in using "gcc".
+# This excludes the "gcc" compiler from the build matrix for OSX:
+matrix:
+  exclude:
+    - os: osx
+      compiler: gcc
 
 # take care of the libusb dependency for Linux
 addons:
@@ -24,3 +34,7 @@ before_install:
 script:
   - make
   - make misc
+
+# turn off email notifications
+notifications:
+  - email: false
diff --git a/Makefile b/Makefile
index d16577b..0df62d6 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-CC = gcc
+CC ?= gcc
 CFLAGS = -g -O0 -Wall -Wextra
 CFLAGS += -std=c99 $(DEFINES)
 CFLAGS += -Iinclude/