[all] cmake: use -march=x86-64-v2 when it becomes available

Moves the logic in 0525515 to a common cmake include, and applies it to
the other binaries.

client/CMakeLists.txt

@@ -1,21 +1,14 @@
 cmake_minimum_required(VERSION 3.0)
 project(looking-glass-client C CXX)
 
-list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/")
+get_filename_component(PROJECT_TOP "${PROJECT_SOURCE_DIR}/.." ABSOLUTE)
+list(APPEND CMAKE_MODULE_PATH "${PROJECT_TOP}/cmake/" "${PROJECT_SOURCE_DIR}/cmake/")
 
 include(GNUInstallDirs)
 include(CheckCCompilerFlag)
 include(FeatureSummary)
 
-option(OPTIMIZE_FOR_NATIVE "Build with -march=native" ON)
+include(OptimizeForNative) # option(OPTIMIZE_FOR_NATIVE)
-if(OPTIMIZE_FOR_NATIVE)
-  CHECK_C_COMPILER_FLAG("-march=native" COMPILER_SUPPORTS_MARCH_NATIVE)
-  if(COMPILER_SUPPORTS_MARCH_NATIVE)
-    add_compile_options("-march=native")
-  endif()
-else()
-  add_compile_options("-march=nehalem" "-mtune=generic")
-endif()
 
 find_package(PkgConfig)
 pkg_check_modules(FONTCONFIG_PKGCONFIG REQUIRED fontconfig)
@@ -87,7 +80,6 @@ find_package(GMP)
 
 add_definitions(-D ATOMIC_LOCKING)
 add_definitions(-D GL_GLEXT_PROTOTYPES)
-get_filename_component(PROJECT_TOP "${PROJECT_SOURCE_DIR}/.." ABSOLUTE)
 
 add_custom_command(
 	OUTPUT	${CMAKE_BINARY_DIR}/version.c

cmake/OptimizeForNative.cmake

@@ -0,0 +1,17 @@
+option(OPTIMIZE_FOR_NATIVE "Build with -march=native" OFF)
+if(OPTIMIZE_FOR_NATIVE)
+  CHECK_C_COMPILER_FLAG("-march=native" COMPILER_SUPPORTS_MARCH_NATIVE)
+  if(COMPILER_SUPPORTS_MARCH_NATIVE)
+    add_compile_options("-march=native")
+  endif()
+else()
+  CHECK_C_COMPILER_FLAG("-march=x86-64-v2" COMPILER_SUPPORTS_MARCH_X86_64_V2)
+  if(COMPILER_SUPPORTS_MARCH_X86_64_V2)
+    add_compile_options("-march=x86-64-v2")
+  else()
+    CHECK_C_COMPILER_FLAG("-march=nehalem" COMPILER_SUPPORTS_MARCH_NEHALEM)
+    if(COMPILER_SUPPORTS_MARCH_NEHALEM)
+      add_compile_options("-march=nehalem")
+    endif()
+  endif()
+endif()

host/CMakeLists.txt

@@ -4,29 +4,14 @@ project(looking-glass-host C)
 set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O3 -g -DNDEBUG" CACHE STRING "compiler flags" FORCE)
 set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O3 -g -DNDEBUG" CACHE STRING "compiler flags" FORCE)
 
-set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/")
+get_filename_component(PROJECT_TOP "${PROJECT_SOURCE_DIR}/.." ABSOLUTE)
+list(APPEND CMAKE_MODULE_PATH "${PROJECT_TOP}/cmake/" "${PROJECT_SOURCE_DIR}/cmake/")
 
 include(GNUInstallDirs)
 include(CheckCCompilerFlag)
 include(FeatureSummary)
 
-option(OPTIMIZE_FOR_NATIVE "Build with -march=native" OFF)
+include(OptimizeForNative) # option(OPTIMIZE_FOR_NATIVE)
-if(OPTIMIZE_FOR_NATIVE)
-  CHECK_C_COMPILER_FLAG("-march=native" COMPILER_SUPPORTS_MARCH_NATIVE)
-  if(COMPILER_SUPPORTS_MARCH_NATIVE)
-    add_compile_options("-march=native")
-  endif()
-else()
-  CHECK_C_COMPILER_FLAG("-march=x86-64-v2" COMPILER_SUPPORTS_MARCH_X86_64_V2)
-  if(COMPILER_SUPPORTS_MARCH_X86_64_V2)
-    add_compile_options("-march=x86-64-v2")
-  else()
-    CHECK_C_COMPILER_FLAG("-march=nehalem" COMPILER_SUPPORTS_MARCH_NEHALEM)
-    if(COMPILER_SUPPORTS_MARCH_NEHALEM)
-      add_compile_options("-march=nehalem")
-    endif()
-  endif()
-endif()
 
 option(ENABLE_BACKTRACE "Enable backtrace support on crash" ON)
 add_feature_info(ENABLE_BACKTRACE ENABLE_BACKTRACE "Backtrace support.")
@@ -42,8 +27,6 @@ add_compile_options(
 )
 set(CMAKE_C_STANDARD  11)
 
-get_filename_component(PROJECT_TOP "${PROJECT_SOURCE_DIR}/.." ABSOLUTE)
-
 add_custom_command(
 	OUTPUT	${CMAKE_BINARY_DIR}/version.c
     ${CMAKE_BINARY_DIR}/include/version.h

obs/CMakeLists.txt

@@ -1,19 +1,14 @@
 cmake_minimum_required(VERSION 3.0)
 project(looking-glass-obs C)
 
-set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/")
+get_filename_component(PROJECT_TOP "${PROJECT_SOURCE_DIR}/.." ABSOLUTE)
+list(APPEND CMAKE_MODULE_PATH "${PROJECT_TOP}/cmake/" "${PROJECT_SOURCE_DIR}/cmake/")
 
 include(GNUInstallDirs)
 include(CheckCCompilerFlag)
 include(FeatureSummary)
 
-option(OPTIMIZE_FOR_NATIVE "Build with -march=native" ON)
+include(OptimizeForNative) # option(OPTIMIZE_FOR_NATIVE)
-if(OPTIMIZE_FOR_NATIVE)
-  CHECK_C_COMPILER_FLAG("-march=native" COMPILER_SUPPORTS_MARCH_NATIVE)
-  if(COMPILER_SUPPORTS_MARCH_NATIVE)
-    add_compile_options("-march=native")
-  endif()
-endif()
 
 option(ENABLE_BACKTRACE "Enable backtrace support on crash" ON)
 add_feature_info(ENABLE_BACKTRACE ENABLE_BACKTRACE "Backtrace support.")
@@ -50,7 +45,6 @@ else()
 endif()
 
 add_definitions(-D ATOMIC_LOCKING)
-get_filename_component(PROJECT_TOP "${PROJECT_SOURCE_DIR}/.." ABSOLUTE)
 
 add_custom_command(
 	OUTPUT	${CMAKE_BINARY_DIR}/version.c

profile/client/CMakeLists.txt

@@ -1,19 +1,14 @@
 cmake_minimum_required(VERSION 3.0)
 project(profiler-client C)
 
-set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/")
+get_filename_component(PROJECT_TOP "${PROJECT_SOURCE_DIR}/../.." ABSOLUTE)
+list(APPEND CMAKE_MODULE_PATH "${PROJECT_TOP}/cmake/" "${PROJECT_SOURCE_DIR}/cmake/")
 
 include(GNUInstallDirs)
 include(CheckCCompilerFlag)
 include(FeatureSummary)
 
-option(OPTIMIZE_FOR_NATIVE "Build with -march=native" ON)
+include(OptimizeForNative) # option(OPTIMIZE_FOR_NATIVE)
-if(OPTIMIZE_FOR_NATIVE)
-  CHECK_C_COMPILER_FLAG("-march=native" COMPILER_SUPPORTS_MARCH_NATIVE)
-  if(COMPILER_SUPPORTS_MARCH_NATIVE)
-    add_compile_options("-march=native")
-  endif()
-endif()
 
 add_compile_options(
   "-Wall"
@@ -36,7 +31,6 @@ execute_process(
 )
 
 add_definitions(-D BUILD_VERSION='"${BUILD_VERSION}"')
-get_filename_component(PROJECT_TOP "${PROJECT_SOURCE_DIR}/../.." ABSOLUTE)
 
 include_directories(
 	${PROJECT_SOURCE_DIR}/include