Portability fixes

- CFLAG gnu99 was changed to c99.
- CXXFLAG c++98 was changed to c++11.
- CFLAG -pedantic-errors was added so that non-ISO C now throws errors.
- _XOPEN_SOURCE feature test macro added and set to 600 to expose SUSv3
  and c99 definitions in modules that required them.
- Fixed tests (and bootstrap daemon logging) that were failing due to
  the altered build flags.
- Avoid string suffix misinterpretation; explicit narrowing conversion.
- Misc. additions to .gitignore to make sure build artifacts don't wind
  up in version control.

1 files changed, 2 insertions, 0 deletions

diff --git a/toxcore/util.c b/toxcore/util.c
index 7a390ea9..1d2a85dc 100644
--- a/toxcore/util.c
+++ b/toxcore/util.c
@@ -22,6 +22,8 @@
  *  along with Tox.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define _XOPEN_SOURCE 600
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif