cmake: Bump dependency versions for UHD 4.0.0.0

- Boost >= 1.58
- CMake >= 3.5.1
- gcc >= 5.4.0
- Clang >= 3.8, AppleClang >= 600
- Python >= 3.5 (Py2k no longer supported)
- Numpy >= 1.11
- C++14 for lib, include may now use C++11 constructs.
  - Because there is no more code requiring C++03 syntax, we remove the
    include-specific clang-format file

7 files changed, 18 insertions, 148 deletions

diff --git a/host/CMakeLists.txt b/host/CMakeLists.txt
index a630016e9..52050cb51 100644
--- a/host/CMakeLists.txt
+++ b/host/CMakeLists.txt
@@ -10,7 +10,7 @@
 ########################################################################
 # NOTE! If you change the version in the following line, also change
 # CMAKE_MIN_VERSION below. (This won't take a variable).
-cmake_minimum_required(VERSION 3.5.1)
+cmake_minimum_required(VERSION 3.8)
 if(POLICY CMP0048)
   cmake_policy(SET CMP0048 NEW) # Suppress Version warnings
 endif(POLICY CMP0048)
@@ -23,20 +23,19 @@ list(INSERT CMAKE_MODULE_PATH 0 ${CMAKE_SOURCE_DIR}/cmake/Modules)
 ########################################################################
 # UHD Dependency Minimum Versions
 ########################################################################
-set(CMAKE_MIN_VERSION "3.5.1")
-set(GCC_MIN_VERSION "4.8.0")
-set(CLANG_MIN_VERSION "3.4.0")
-set(APPLECLANG_MIN_VERSION "503")
+set(CMAKE_MIN_VERSION "3.8")
+set(GCC_MIN_VERSION "5.4.0")
+set(CLANG_MIN_VERSION "3.8.0")
+set(APPLECLANG_MIN_VERSION "600")
 # Make sure to update the next two in unison:
-set(MSVC_MIN_VERSION "1900")
-set(MSVC_MIN_VERSION_READABLE "14.0")
+set(MSVC_MIN_VERSION "1910")
+set(MSVC_MIN_VERSION_READABLE "15.0")
 # This Python version gets used for Python API (if requested) as well as
 # all the build-time Python scripts
-set(PYTHON_MIN_VERSION "2.7")
-set(PYTHON3_MIN_VERSION "3.5")
+set(PYTHON_MIN_VERSION "3.5")
 # Other deps
 set(BOOST_MIN_VERSION "1.58")
-set(NUMPY_MIN_VERSION "1.7")
+set(NUMPY_MIN_VERSION "1.11")
 set(PY_MAKO_MIN_VERSION "0.4.2")
 set(PY_REQUESTS_MIN_VERSION "2.0")
 
@@ -360,7 +359,7 @@ UHD_INSTALL(FILES
 ########################################################################
 # Register top level components
 ########################################################################
-LIBUHD_REGISTER_COMPONENT("LibUHD" ENABLE_LIBUHD ON "Boost_FOUND;HAVE_PYTHON_PLAT_MIN_VERSION;HAVE_PYTHON_MODULE_MAKO" OFF ON)
+LIBUHD_REGISTER_COMPONENT("LibUHD" ENABLE_LIBUHD ON "Boost_FOUND;HAVE_PYTHON_MODULE_MAKO" OFF ON)
 LIBUHD_REGISTER_COMPONENT("LibUHD - C API" ENABLE_C_API ON "ENABLE_LIBUHD" OFF OFF)
 if(WIN32)
   LIBUHD_REGISTER_COMPONENT("LibUHD - Python API" ENABLE_PYTHON_API OFF "ENABLE_LIBUHD;HAVE_PYTHON_MODULE_NUMPY;HAVE_PYTHON_LIBS" OFF OFF)
diff --git a/host/cmake/Modules/UHDPython.cmake b/host/cmake/Modules/UHDPython.cmake
index a93761131..d3fac6100 100644
--- a/host/cmake/Modules/UHDPython.cmake
+++ b/host/cmake/Modules/UHDPython.cmake
@@ -19,12 +19,9 @@ if(PYTHON_EXECUTABLE)
     set(PYTHONINTERP_FOUND TRUE)
 endif(PYTHON_EXECUTABLE)
 
-# We always try to find Py3k first. Once we only support Py3k we can remove
-# most of this.
 if(NOT PYTHONINTERP_FOUND)
-    find_package(Python3 ${PYTHON3_MIN_VERSION} QUIET)
+    find_package(Python3 ${PYTHON_MIN_VERSION} QUIET)
     if(Python3_Interpreter_FOUND)
-        set(PYTHON_MIN_VERSION ${PYTHON3_MIN_VERSION})
         set(PYTHON_VERSION ${Python3_VERSION})
         set(PYTHON_EXECUTABLE ${Python3_EXECUTABLE})
         set(PYTHONINTERP_FOUND TRUE)
@@ -32,43 +29,18 @@ if(NOT PYTHONINTERP_FOUND)
 endif(NOT PYTHONINTERP_FOUND)
 
 if(NOT PYTHONINTERP_FOUND)
-    find_package(PythonInterp ${PYTHON3_MIN_VERSION} QUIET)
+    find_package(PythonInterp ${PYTHON_MIN_VERSION} QUIET)
     if(PYTHONINTERP_FOUND)
-        set(PYTHON_MIN_VERSION ${PYTHON3_MIN_VERSION})
         set(PYTHON_VERSION ${PYTHON_VERSION_STRING})
     endif(PYTHONINTERP_FOUND)
 endif(NOT PYTHONINTERP_FOUND)
 
-# Next, try and find Py2k.
-if(NOT PYTHONINTERP_FOUND)
-    find_package(Python2 ${PYTHON_MIN_VERSION} QUIET)
-    if(Python2_Interpreter_FOUND)
-        set(PYTHON_VERSION ${Python2_VERSION})
-        set(PYTHON_EXECUTABLE ${Python2_EXECUTABLE})
-        set(PYTHONINTERP_FOUND TRUE)
-    endif(Python2_Interpreter_FOUND)
-endif(NOT PYTHONINTERP_FOUND)
-
-if(NOT PYTHONINTERP_FOUND)
-    find_package(PythonInterp ${PYTHON_MIN_VERSION} QUIET)
-    set(PYTHON_VERSION ${PYTHON_VERSION_STRING})
-endif(NOT PYTHONINTERP_FOUND)
-
 # If that fails, try using the build-in find program routine.
 if(NOT PYTHONINTERP_FOUND)
     message(STATUS "Attempting to find Python without CMake...")
     find_program(PYTHON_EXECUTABLE NAMES python3 python3.5 python3.6 python3.7 python3.8)
     if(PYTHON_EXECUTABLE)
         set(PYTHONINTERP_FOUND TRUE)
-        set(PYTHON_MIN_VERSION ${PYTHON3_MIN_VERSION})
-    endif(PYTHON_EXECUTABLE)
-endif(NOT PYTHONINTERP_FOUND)
-
-if(NOT PYTHONINTERP_FOUND)
-    message(STATUS "Attempting to find Python without CMake...")
-    find_program(PYTHON_EXECUTABLE NAMES python2 python2.7)
-    if(PYTHON_EXECUTABLE)
-        set(PYTHONINTERP_FOUND TRUE)
     endif(PYTHON_EXECUTABLE)
 endif(NOT PYTHONINTERP_FOUND)
 
diff --git a/host/cmake/Modules/UHDVersion.cmake b/host/cmake/Modules/UHDVersion.cmake
index 99e898649..cf2767a1a 100644
--- a/host/cmake/Modules/UHDVersion.cmake
+++ b/host/cmake/Modules/UHDVersion.cmake
@@ -17,8 +17,8 @@ find_package(Git QUIET)
 #  - Increment patch for bugfixes and docs
 #  - set UHD_VERSION_DEVEL to true for master and development branches
 ########################################################################
-set(UHD_VERSION_MAJOR 3)
-set(UHD_VERSION_API   15)
+set(UHD_VERSION_MAJOR 4)
+set(UHD_VERSION_API   0)
 set(UHD_VERSION_ABI   0)
 set(UHD_VERSION_PATCH 0)
 set(UHD_VERSION_DEVEL FALSE)
diff --git a/host/docs/build.dox.in b/host/docs/build.dox.in
index 819755b9a..e3e7c50de 100644
--- a/host/docs/build.dox.in
+++ b/host/docs/build.dox.in
@@ -64,7 +64,7 @@ The directory to which you extract libusb must not contain spaces. This is to sa
 ### Python
 
 - **Purpose:** Used by mako build time,  and utility scripts and the Python API at runtime
-- **Minimum Version:** 2.7
+- **Minimum Version:** 3.5
 - **Usage:** build time + runtime utility scripts (required)
 - **Download URL:** http://www.python.org/download/
 - **Comments for Windows Users:**
diff --git a/host/docs/pythonapi.dox b/host/docs/pythonapi.dox
index c8f504049..8015034a5 100644
--- a/host/docs/pythonapi.dox
+++ b/host/docs/pythonapi.dox
@@ -16,14 +16,7 @@ using the binary installers provided on https://www.python.org/downloads/windows
 If CMake can't find the Python headers or library, specify
 the `PYTHON_INCLUDE_DIR` and/or `PYTHON_LIBRARY` CMake variables manually.
 
-
-\subsection python_install_2v3 Python 2 vs. 3
-
-The Python API supports both Python 2 and 3, but if you have both versions
-installed, CMake might require some hints which version is the desired one.
-To force a particular version, it helps to set `-DPYTHON_EXECUTABLE=/usr/bin/python3`,
-or whatever interpreter you are expecting. The variables PYTHON_LIBRARY and
-PYTHON_INCLUDE_DIR may also need to be set.
+Note that since UHD version 4.0.0.0, Python 2 is no longer supported.
 
 \subsection python_install_windows Installing on Windows
 
diff --git a/host/examples/init_usrp/CMakeLists.txt b/host/examples/init_usrp/CMakeLists.txt
index 40fcf9016..0a81d2d48 100644
--- a/host/examples/init_usrp/CMakeLists.txt
+++ b/host/examples/init_usrp/CMakeLists.txt
@@ -23,10 +23,10 @@ endif()
 option(UHD_USE_STATIC_LIBS OFF)
 
 # To add UHD as a dependency to this project, add a line such as this:
-find_package(UHD 3.15.0 REQUIRED)
+find_package(UHD 4.0.0 REQUIRED)
 # The version in  ^^^^^  here is a minimum version.
 # To specify an exact version:
-#find_package(UHD 3.15.0 EXACT REQUIRED)
+#find_package(UHD 4.0.0 EXACT REQUIRED)
 
 # This example also requires Boost.
 # Set components here, then include UHDBoost to do the actual finding
diff --git a/host/include/.clang-format b/host/include/.clang-format
deleted file mode 100644
index e2dc7e0a7..000000000
--- a/host/include/.clang-format
+++ /dev/null
@@ -1,94 +0,0 @@
----
-Language: Cpp
-AccessModifierOffset: -4
-AlignAfterOpenBracket: DontAlign
-AlignConsecutiveAssignments: true
-AlignConsecutiveDeclarations: false
-AlignEscapedNewlines: Left
-AlignOperands:   true
-AlignTrailingComments: false
-AllowAllParametersOfDeclarationOnNextLine: true
-AllowShortBlocksOnASingleLine: false
-AllowShortCaseLabelsOnASingleLine: false
-AllowShortFunctionsOnASingleLine: Empty
-AllowShortIfStatementsOnASingleLine: false
-AllowShortLoopsOnASingleLine: false
-AlwaysBreakAfterReturnType: None
-AlwaysBreakBeforeMultilineStrings: false
-AlwaysBreakTemplateDeclarations: true
-BinPackArguments: false
-BinPackParameters: false
-BreakBeforeBinaryOperators: NonAssignment
-BreakBeforeBraces: Custom
-BraceWrapping:
-     AfterClass: true
-     AfterControlStatement: false
-     AfterEnum: false
-     AfterFunction: true
-     AfterNamespace: false
-     AfterStruct: true
-BreakBeforeInheritanceComma: false
-BreakBeforeTernaryOperators: true
-BreakConstructorInitializers: BeforeComma
-BreakStringLiterals: true
-ColumnLimit:     90
-CompactNamespaces: true
-ConstructorInitializerAllOnOneLineOrOnePerLine: true
-ConstructorInitializerIndentWidth: 4
-ContinuationIndentWidth: 4
-Cpp11BracedListStyle: true
-DerivePointerAlignment: false
-DisableFormat:   false
-ExperimentalAutoDetectBinPacking: false
-ForEachMacros:
-  - foreach
-  - BOOST_FOREACH
-IncludeBlocks: Merge
-IncludeCategories:
-  - Regex:           '^"'
-    Priority:        1
-  - Regex:           '^"(uhd)/'
-    Priority:        2
-  - Regex:           '^"(uhdlib)/'
-    Priority:        3
-  - Regex:           '^<(uhd)/'
-    Priority:        4
-  - Regex:           '^<(uhdlib)/'
-    Priority:        5
-  - Regex:           '^<(boost)/'
-    Priority:        98
-  - Regex:           '^<[a-z]*>$'
-    Priority:        99
-  - Regex:           '.*'
-    Priority:        10
-
-IndentCaseLabels: true
-IndentPPDirectives: AfterHash
-IndentWidth: 4
-IndentWrappedFunctionNames: false
-KeepEmptyLinesAtTheStartOfBlocks: false
-MaxEmptyLinesToKeep: 2
-NamespaceIndentation: None
-PenaltyBreakAssignment: 10
-PenaltyBreakBeforeFirstCallParameter: 19
-PenaltyBreakComment: 300
-PenaltyBreakFirstLessLess: 120
-PenaltyBreakString: 1000
-PenaltyExcessCharacter: 1000000
-PenaltyReturnTypeOnItsOwnLine: 60
-PointerAlignment: Left
-ReflowComments:  true
-SortIncludes:    true
-SpaceAfterCStyleCast: false
-SpaceAfterTemplateKeyword: true
-SpaceBeforeAssignmentOperators: true
-SpaceBeforeParens: ControlStatements
-SpaceInEmptyParentheses: false
-SpacesBeforeTrailingComments: 1
-SpacesInAngles:  false
-SpacesInContainerLiterals: false
-SpacesInParentheses: false
-SpacesInSquareBrackets: false
-Standard:        Cpp03
-TabWidth:        8
-UseTab:          Never