Fix direct compilation failed apache#1862 (apache#1875)

Fix direct compilation failed：

fix compile thirdparty in ubuntu will install libs to lib dir instead of lib64
fix compile error in gcc5 due to the defect of c++11 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60970)
fix gcc version check will not work on some OS

be/src/olap/key_coder.cpp

@@ -27,6 +27,13 @@ KeyCoder::KeyCoder(TraitsType traits)
         _decode_ascending(traits.decode_ascending) {
 }
 
+struct EnumClassHash {
+    template <typename T>
+    std::size_t operator()(T t) const {
+        return static_cast<std::size_t>(t);
+    }
+};
+
 // Helper class used to get KeyCoder
 class KeyCoderResolver {
 public:
@@ -71,7 +78,7 @@ class KeyCoderResolver {
         _coder_map.emplace(field_type, new KeyCoder(KeyCoderTraits<field_type>()));
     }
 
-    std::unordered_map<FieldType, KeyCoder*> _coder_map;
+    std::unordered_map<FieldType, KeyCoder*, EnumClassHash> _coder_map;
 };
 
 const KeyCoder* get_key_coder(FieldType type) {

env.sh

@@ -54,7 +54,7 @@ if [[ -z ${DORIS_GCC_HOME} ]]; then
     export DORIS_GCC_HOME=$(dirname `which gcc`)/..
 fi
 
-gcc_ver=`${DORIS_GCC_HOME}/bin/gcc -dumpversion`
+gcc_ver=`${DORIS_GCC_HOME}/bin/gcc -dumpfullversion -dumpversion`
 required_ver="5.3.1"
 if [[ ! "$(printf '%s\n' "$required_ver" "$gcc_ver" | sort -V | head -n1)" = "$required_ver" ]]; then 
     echo "Error: GCC version (${gcc_ver}) must be greater than or equal to ${required_ver}"

thirdparty/build-thirdparty.sh

@@ -322,6 +322,7 @@ build_snappy() {
     mkdir build -p && cd build
     rm -rf CMakeCache.txt CMakeFiles/
     CFLAGS="-O3" CXXFLAGS="-O3" $CMAKE_CMD -DCMAKE_INSTALL_PREFIX=$TP_INSTALL_DIR \
+    -DCMAKE_INSTALL_LIBDIR=lib64 \
     -DCMAKE_POSITION_INDEPENDENT_CODE=On \
     -DCMAKE_INSTALL_INCLUDEDIR=$TP_INCLUDE_DIR/snappy \
     -DSNAPPY_BUILD_TESTS=0 ../
@@ -536,6 +537,7 @@ build_arrow() {
 
     cmake -DARROW_PARQUET=ON -DARROW_IPC=OFF -DARROW_BUILD_SHARED=OFF \
     -DCMAKE_INSTALL_PREFIX=$TP_INSTALL_DIR \
+    -DCMAKE_INSTALL_LIBDIR=lib64 \
     -DARROW_BOOST_USE_SHARED=OFF -DBoost_NO_BOOST_CMAKE=ON -DBOOST_ROOT=$TP_INSTALL_DIR \
     -Dgflags_ROOT=$TP_INSTALL_DIR/ \
     -DSnappy_ROOT=$TP_INSTALL_DIR/ \