diff --git a/.travis.yml b/.travis.yml
index 6ef03aa7..3d01de23 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,13 +23,10 @@ env:
         o1F2EwFbiso0EmtzhAPs19ujiVxkLn4=
 
 matrix:
-  exclude:
-    - env: TRAVIS_EMPTY_JOB_WORKAROUND=true
   include:
       # Documentation
-    - env: CXX_COMPILER=g++-6 BUILD=Doc
+    - env: BUILD=Doc
       sudo: required
-      compiler: gcc
       # g++ 6 on Linux with C++14
     - env: CXX_COMPILER=g++-6 BUILD=Debug STANDARD=14
       compiler: gcc
@@ -116,15 +113,9 @@ matrix:
     - env: CXX_COMPILER=g++-4.4 BUILD=Debug STANDARD=0x
       compiler: gcc
 
-install:
-    - DEPS_DIR="${TRAVIS_BUILD_DIR}/deps"
-    - mkdir -p ${DEPS_DIR} && cd ${DEPS_DIR}
-
-    - cd ${TRAVIS_BUILD_DIR}
-
 before_script:
   - if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then export CXX=${CXX_COMPILER}; fi
-  - ${CXX} --version
+  - if [[ "${BUILD}" != "Doc" ]]; then ${CXX} --version; fi
 
 script:
   - support/travis-build.py
diff --git a/include/fmt/core.h b/include/fmt/core.h
index 17b685a2..e8a6f615 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -36,6 +36,12 @@
 # define FMT_HAS_CPP_ATTRIBUTE(x) 0
 #endif
 
+#if defined(__GNUC__) && !defined(__clang__)
+# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
+#else
+# define FMT_GCC_VERSION 0
+#endif
+
 #if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
 # define FMT_HAS_GXX_CXX11 FMT_GCC_VERSION
 #else
@@ -557,21 +563,22 @@ struct typed_value : value<Context> {
 template <typename Context, typename T>
 FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T &value);
 
-#if FMT_GCC_VERSION >= 406
-# pragma GCC diagnostic push
-# pragma GCC diagnostic ignored "-Wuseless-cast"
-#endif
-
 #define FMT_MAKE_VALUE(TAG, ArgType, ValueType) \
   template <typename C> \
   FMT_CONSTEXPR typed_value<C, TAG> make_value(ArgType val) { \
     return static_cast<ValueType>(val); \
   }
 
+#define FMT_MAKE_VALUE_SAME(TAG, Type) \
+  template <typename C> \
+  FMT_CONSTEXPR typed_value<C, TAG> make_value(Type val) { \
+    return val; \
+  }
+
 FMT_MAKE_VALUE(bool_type, bool, int)
 FMT_MAKE_VALUE(int_type, short, int)
 FMT_MAKE_VALUE(uint_type, unsigned short, unsigned)
-FMT_MAKE_VALUE(int_type, int, int)
+FMT_MAKE_VALUE_SAME(int_type, int)
 FMT_MAKE_VALUE(uint_type, unsigned, unsigned)
 
 // To minimize the number of types we need to deal with, long is translated
@@ -586,7 +593,7 @@ FMT_MAKE_VALUE(
     (sizeof(unsigned long) == sizeof(unsigned) ? uint_type : ulong_long_type),
     unsigned long, ulong_type)
 
-FMT_MAKE_VALUE(long_long_type, long long, long long)
+FMT_MAKE_VALUE_SAME(long_long_type, long long)
 FMT_MAKE_VALUE(ulong_long_type, unsigned long long, unsigned long long)
 FMT_MAKE_VALUE(int_type, signed char, int)
 FMT_MAKE_VALUE(uint_type, unsigned char, unsigned)
@@ -601,8 +608,8 @@ inline typed_value<C, char_type> make_value(wchar_t val) {
 #endif
 
 FMT_MAKE_VALUE(double_type, float, double)
-FMT_MAKE_VALUE(double_type, double, double)
-FMT_MAKE_VALUE(long_double_type, long double, long double)
+FMT_MAKE_VALUE_SAME(double_type, double)
+FMT_MAKE_VALUE_SAME(long_double_type, long double)
 
 // Formatting of wide strings into a narrow buffer and multibyte strings
 // into a wide buffer is disallowed (https://github.com/fmtlib/fmt/pull/606).
@@ -612,28 +619,22 @@ FMT_MAKE_VALUE(cstring_type, const typename C::char_type*,
                const typename C::char_type*)
 
 FMT_MAKE_VALUE(cstring_type, signed char*, const signed char*)
-FMT_MAKE_VALUE(cstring_type, const signed char*, const signed char*)
+FMT_MAKE_VALUE_SAME(cstring_type, const signed char*)
 FMT_MAKE_VALUE(cstring_type, unsigned char*, const unsigned char*)
-FMT_MAKE_VALUE(cstring_type, const unsigned char*, const unsigned char*)
-FMT_MAKE_VALUE(string_type, basic_string_view<typename C::char_type>,
-               basic_string_view<typename C::char_type>)
+FMT_MAKE_VALUE_SAME(cstring_type, const unsigned char*)
+FMT_MAKE_VALUE_SAME(string_type, basic_string_view<typename C::char_type>)
 FMT_MAKE_VALUE(string_type,
                typename basic_string_view<typename C::char_type>::type,
                basic_string_view<typename C::char_type>)
 FMT_MAKE_VALUE(string_type, const std::basic_string<typename C::char_type>&,
                basic_string_view<typename C::char_type>)
 FMT_MAKE_VALUE(pointer_type, void*, const void*)
-FMT_MAKE_VALUE(pointer_type, const void*, const void*)
+FMT_MAKE_VALUE_SAME(pointer_type, const void*)
 
 #if FMT_USE_NULLPTR
 FMT_MAKE_VALUE(pointer_type, std::nullptr_t, const void*)
 #endif
 
-#if FMT_GCC_VERSION >= 406
-// -Wuseless-cast
-# pragma GCC diagnostic pop
-#endif
-
 // Formatting of arbitrary pointers is disallowed. If you want to output a
 // pointer cast it to "void *" or "const void *". In particular, this forbids
 // formatting of "[const] volatile char *" which is printed as bool by
diff --git a/include/fmt/format-inl.h b/include/fmt/format-inl.h
index ac29038c..2495b0f3 100644
--- a/include/fmt/format-inl.h
+++ b/include/fmt/format-inl.h
@@ -65,8 +65,7 @@ inline fmt::internal::null<> strerror_s(char *, std::size_t, ...) {
 
 FMT_BEGIN_NAMESPACE
 
-FMT_FUNC format_error::~format_error() throw() {}
-FMT_FUNC system_error::~system_error() FMT_DTOR_NOEXCEPT {}
+namespace {
 
 #ifndef _MSC_VER
 # define FMT_SNPRINTF snprintf
diff --git a/include/fmt/format.h b/include/fmt/format.h
index f7bfe233..75ca3a17 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -37,12 +37,6 @@
 #include <stdexcept>
 #include <stdint.h>
 
-#if defined(__GNUC__) && !defined(__clang__)
-# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-#else
-# define FMT_GCC_VERSION 0
-#endif
-
 #ifdef __clang__
 # define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
 #else
@@ -63,7 +57,8 @@
 # define FMT_MSC_VER 0
 #endif
 
-#if FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION
+#if (defined(__GNUC__) && !defined(__clang__) && __GNUC__ >= 406) || \
+    FMT_CLANG_VERSION
 # pragma GCC diagnostic push
 
 // Disable the warning about declaration shadowing because it affects too
@@ -81,8 +76,6 @@
 # pragma clang diagnostic ignored "-Wweak-vtables"
 # pragma clang diagnostic ignored "-Wpadded"
 # pragma clang diagnostic ignored "-Wgnu-statement-expression"
-# pragma clang diagnostic ignored "-Wc++98-compat"
-# pragma clang diagnostic ignored "-Wc++98-compat-pedantic"
 # pragma clang diagnostic ignored "-Wglobal-constructors"
 # pragma clang diagnostic ignored "-Wdisabled-macro-expansion"
 # pragma clang diagnostic ignored "-Wdocumentation-unknown-command"
@@ -3146,7 +3139,7 @@ struct formatter<
       break;
     case internal::char_type:
       handle_char_specs(specs_, internal::char_specs_checker<decltype(eh)>(
-                          type_spec, eh));
+                          static_cast<char>(type_spec), eh));
       break;
     case internal::double_type:
     case internal::long_double_type:
@@ -3178,8 +3171,8 @@ struct formatter<
     internal::handle_dynamic_spec<internal::precision_checker>(
       specs_.precision_, specs_.precision_ref, ctx);
     typedef output_range<typename FormatContext::iterator,
-                         typename FormatContext::char_type> range;
-    visit(arg_formatter<range>(ctx, specs_),
+                         typename FormatContext::char_type> range_type;
+    visit(arg_formatter<range_type>(ctx, specs_),
           internal::make_arg<FormatContext>(val));
     return ctx.out();
   }
diff --git a/include/fmt/printf.h b/include/fmt/printf.h
index 5a396964..bf4a293b 100644
--- a/include/fmt/printf.h
+++ b/include/fmt/printf.h
@@ -52,7 +52,6 @@ class printf_precision_handler: public function<int> {
   typename std::enable_if<!std::is_integral<T>::value, int>::type
       operator()(T) {
     FMT_THROW(format_error("precision is not integer"));
-    return 0;
   }
 };
 
@@ -194,7 +193,6 @@ class printf_width_handler: public function<unsigned> {
   typename std::enable_if<!std::is_integral<T>::value, unsigned>::type
       operator()(T) {
     FMT_THROW(format_error("width is not integer"));
-    return 0;
   }
 };
 }  // namespace internal
diff --git a/include/fmt/ranges.h b/include/fmt/ranges.h
index 3e8480a1..e5dc63f7 100644
--- a/include/fmt/ranges.h
+++ b/include/fmt/ranges.h
@@ -126,8 +126,38 @@ struct is_tuple_like {
     is_tuple_like_<T>::value && !is_range_<T>::value;
 };
 
-template <size_t... Is, class Tuple, class F>
-void for_each(std::index_sequence<Is...>, Tuple &&tup, F &&f) noexcept {
+// Check for integer_sequence
+#if defined(__cpp_lib_integer_sequence) || FMT_MSC_VER >= 1910
+template <typename T, T... N>
+using integer_sequence = std::integer_sequence<T, N...>;
+template <std::size_t... N>
+using index_sequence = std::index_sequence<N...>;
+template <std::size_t N>
+using make_index_sequence = std::make_index_sequence<N>;
+#else
+template <typename T, T... N>
+struct integer_sequence {
+    typedef T value_type;
+
+    static FMT_CONSTEXPR std::size_t size() {
+        return sizeof...(N);
+    }
+};
+
+template <std::size_t... N>
+using index_sequence = integer_sequence<std::size_t, N...>;
+
+template <typename T, std::size_t N, T... Ns>
+struct make_integer_sequence : make_integer_sequence<T, N - 1, N - 1, Ns...> {};
+template <typename T, T... Ns>
+struct make_integer_sequence<T, 0, Ns...> : integer_sequence<T, Ns...> {};
+
+template <std::size_t N>
+using make_index_sequence = make_integer_sequence<std::size_t, N>;
+#endif
+
+template <class Tuple, class F, size_t... Is>
+void for_each(index_sequence<Is...>, Tuple &&tup, F &&f) noexcept {
   using std::get;
   // using free function get<I>(T) now.
   const int _[] = {0, ((void)f(get<Is>(tup)), 0)...};
@@ -135,7 +165,7 @@ void for_each(std::index_sequence<Is...>, Tuple &&tup, F &&f) noexcept {
 }
 
 template <class T>
-FMT_CONSTEXPR std::make_index_sequence<std::tuple_size<T>::value> 
+FMT_CONSTEXPR make_index_sequence<std::tuple_size<T>::value> 
 get_indexes(T const &) { return {}; }
 
 template <class Tuple, class F>
diff --git a/include/fmt/time.h b/include/fmt/time.h
index 5976ea6e..7ca967f6 100644
--- a/include/fmt/time.h
+++ b/include/fmt/time.h
@@ -54,7 +54,6 @@ inline std::tm localtime(std::time_t time) {
     return lt.tm_;
   // Too big time values may be unsupported.
   FMT_THROW(format_error("time_t value out of range"));
-  return std::tm();
 }
 
 // Thread-safe replacement for std::gmtime
@@ -90,7 +89,6 @@ inline std::tm gmtime(std::time_t time) {
     return gt.tm_;
   // Too big time values may be unsupported.
   FMT_THROW(format_error("time_t value out of range"));
-  return std::tm();
 }
 
 namespace internal {
diff --git a/support/appveyor.yml b/support/appveyor.yml
index cc5ef9a9..ede92196 100644
--- a/support/appveyor.yml
+++ b/support/appveyor.yml
@@ -1,4 +1,6 @@
-configuration: Debug
+configuration:
+  - Debug
+  - Release
 
 clone_depth: 1
 
@@ -32,7 +34,7 @@ before_build:
  - mkdir build
  - cd build
     
- - ps: cmake -G "$($env:CMAKE_GENERATOR)$($env:CMAKE_GENERATOR_SUFFIX)" -DFMT_WERROR=OFF -DFMT_PEDANTIC=ON -DCMAKE_BUILD_TYPE=Debug ..
+ - ps: cmake -G "$($env:CMAKE_GENERATOR)$($env:CMAKE_GENERATOR_SUFFIX)" -DFMT_WERROR=OFF -DFMT_PEDANTIC=ON -DCMAKE_BUILD_TYPE="$($env:configuration)" ..
 
 build:
   project: C:\projects\fmt\build\fmt.sln
@@ -42,7 +44,7 @@ build:
 test_script:
   - ps: |
       New-Item .\DartConfiguration.tcl -ItemType file
-      ctest -C Debug -T Test
+      ctest -C "$($env:configuration)" -T Test
       $XSLInputElement = New-Object System.Xml.Xsl.XslCompiledTransform
       $XslInputElement.Load("https://raw.githubusercontent.com/rpavlik/jenkins-ctest-plugin/master/ctest-to-junit.xsl")
       $file = $(ls Testing\*\Test.xml) | Select -first 1
diff --git a/test/format-impl-test.cc b/test/format-impl-test.cc
index 79ddd396..d7511cd0 100644
--- a/test/format-impl-test.cc
+++ b/test/format-impl-test.cc
@@ -30,9 +30,8 @@ struct ValueExtractor: fmt::internal::function<T> {
   }
 
   template <typename U>
-  T operator()(U) {
+  FMT_NORETURN T operator()(U) {
     throw std::runtime_error(fmt::format("invalid type {}", typeid(U).name()));
-    return T();
   }
 };
 
diff --git a/test/gtest-extra-test.cc b/test/gtest-extra-test.cc
index 53f0a0d6..2043f549 100644
--- a/test/gtest-extra-test.cc
+++ b/test/gtest-extra-test.cc
@@ -195,39 +195,33 @@ TEST(ExpectSystemErrorTest, DoesNotGenerateUnreachableCodeWarning) {
 }
 
 TEST(AssertionSyntaxTest, ExceptionAssertionBehavesLikeSingleStatement) {
-  if (::testing::internal::AlwaysFalse()) {
+  if (::testing::internal::AlwaysFalse())
     EXPECT_THROW_MSG(do_nothing(), std::exception, "");
-  }
 
-  if (::testing::internal::AlwaysTrue()) {
+  if (::testing::internal::AlwaysTrue())
     EXPECT_THROW_MSG(throw_exception(), std::exception, "test");
-  } else {
+  else
     do_nothing();
-  }
 }
 
 TEST(AssertionSyntaxTest, SystemErrorAssertionBehavesLikeSingleStatement) {
-  if (::testing::internal::AlwaysFalse()) {
+  if (::testing::internal::AlwaysFalse())
     EXPECT_SYSTEM_ERROR(do_nothing(), EDOM, "");
-  }
 
-  if (::testing::internal::AlwaysTrue()) {
+  if (::testing::internal::AlwaysTrue())
     EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test");
-  } else {
+  else
     do_nothing();
-  }
 }
 
 TEST(AssertionSyntaxTest, WriteAssertionBehavesLikeSingleStatement) {
-  if (::testing::internal::AlwaysFalse()) {
+  if (::testing::internal::AlwaysFalse())
     EXPECT_WRITE(stdout, std::printf("x"), "x");
-  }
 
-  if (::testing::internal::AlwaysTrue()) {
+  if (::testing::internal::AlwaysTrue())
     EXPECT_WRITE(stdout, std::printf("x"), "x");
-  } else {
+  else
     do_nothing();
-  }
 }
 
 // Tests EXPECT_THROW_MSG.
diff --git a/test/util-test.cc b/test/util-test.cc
index a9329a38..b22aa0ed 100644
--- a/test/util-test.cc
+++ b/test/util-test.cc
@@ -822,7 +822,8 @@ TEST(UtilTest, FormatLongWindowsError) {
   const int provisioning_not_allowed = 0x80284013L /*TBS_E_PROVISIONING_NOT_ALLOWED*/;
   if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER |
       FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 0,
-      provisioning_not_allowed, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+      static_cast<DWORD>(provisioning_not_allowed),
+      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
       reinterpret_cast<LPWSTR>(&message), 0, 0) == 0) {
     return;
   }