restore C+11 build, try to install gcc4.8 in travis

.travis.yml

@@ -18,6 +18,10 @@ env:
    - secure: "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"
 
 before_install:
+  - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+  - sudo apt-get -qq update
+  - sudo apt-get -qq install g++-4.8
+install:
   - sudo apt-get install libcomedi-dev libcommoncpp2-dev libmysqlclient-dev libomniorb4-dev omniidl libpqxx3-dev librrd-dev libsigc++-2.0-dev libsqlite3-dev python-dev
 
 before_script:

autogen.sh

@@ -2,6 +2,6 @@
 
 autoreconf -fiv
 
-export CXXFLAGS='-pipe -O2 -pedantic -Wall -std=c++11'
+export CXXFLAGS='-pipe -O2 -pedantic -Wall'
 
 ./configure --enable-maintainer-mode --prefix=/usr $*

conf/libuniset2.spec

@@ -31,6 +31,9 @@ Source: %name-%version.tar
 # optimized out: fontconfig gcc-c++ libcloog-isl4 libstdc++-devel libwayland-client libwayland-server libxml2-devel pkg-config python-base python-devel python-module-omniidl python-modules
 BuildRequires: libcommoncpp2-devel libomniORB-devel libsigc++2-devel
 
+# due -std=c++11 using
+BuildPreReq: gcc5 >= 4.8
+
 %if_enabled io
 BuildRequires: libcomedi-devel
 %endif

configure.ac

@@ -280,7 +280,7 @@ CXX_EXTRA_FLAGS="-Wnon-virtual-dtor -Wctor-dtor-privacy -Woverloaded-virtual"
 # export
 LDFLAGS="${OMNI_LIBS} ${XML_LIBS} ${SIGC_LIBS} ${COV_LIBS}"
 # all developer liked options add to autogen.sh, please
-CXXFLAGS="$CXXFLAGS -funsigned-char -g -D_GNU_SOURCE ${OMNI_CFLAGS} ${XML_CFLAGS} ${SIGC_CFLAGS} ${COV_CFLAGS} -I\$(top_builddir)/include $CXX_EXTRA_FLAGS"
+CXXFLAGS="$CXXFLAGS -funsigned-char -std=c++11 -g -D_GNU_SOURCE ${OMNI_CFLAGS} ${XML_CFLAGS} ${SIGC_CFLAGS} ${COV_CFLAGS} -I\$(top_builddir)/include $CXX_EXTRA_FLAGS"
 
 AC_SUBST(LDFLAGS)
 AC_SUBST(CXXFLAGS)