From 31bb7fd29bca88f86860bdc8aa7f09c3e8e3f111 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@gmail.com>
Date: Fri, 23 Dec 2016 22:19:13 +0100
Subject: Initial commit

---
 cmake/modules/CompilerSetup.cmake | 115 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 cmake/modules/CompilerSetup.cmake

(limited to 'cmake/modules/CompilerSetup.cmake')

diff --git a/cmake/modules/CompilerSetup.cmake b/cmake/modules/CompilerSetup.cmake
new file mode 100644
index 0000000..82d0b2d
--- /dev/null
+++ b/cmake/modules/CompilerSetup.cmake
@@ -0,0 +1,115 @@
+if(NOT CXX_VERSION)
+  set(CXX_VERSION "c++14")
+endif()
+
+# Acquire compiler information
+execute_process(
+  COMMAND
+  bash -c "${CMAKE_CXX_COMPILER} -E -xc++ -std=${CXX_VERSION} - -v </dev/null 2>&1"
+  OUTPUT_VARIABLE
+  COMPILER_SETTINGS
+  )
+
+# Extract system headers
+string(
+  REGEX
+  REPLACE
+  "(.*#include <\.\.\.> search starts here:)\n(.*)\n(End of search list\..*)" "\\2"
+  LINES
+  ${COMPILER_SETTINGS}
+  )
+
+# Prepare the list of system headrs
+string(STRIP ${LINES} LINES)
+string(REPLACE " " "" LINES ${LINES})
+string(REPLACE "\n" ";" LINES ${LINES})
+
+# Trick CMake to explicitely add /usr/include to the system headers
+list(APPEND LINES "/usr/bin/../include")
+
+# Add system header locations to the system header search-path
+include_directories(SYSTEM ${LINES})
+
+# Prepare some generic C++ compiler flags
+set(CMAKE_CXX_FLAGS "-std=${CXX_VERSION} -Wall -Wextra -pedantic -Werror")
+
+# Make pedantic warning fatal with GCC
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic-errors")
+endif()
+
+# Create upper-case copy of the project name for variable prefixes
+string(TOUPPER ${PROJECT_NAME} PROJECT_NAME_UPPER)
+
+# Enable support for different sanitizers when building with clang
+if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  option(${PROJECT_NAME_UPPER}_ENABLE_ASAN "Enable ASan (address sanitization)" OFF)
+  option(${PROJECT_NAME_UPPER}_ENABLE_UBSAN "Enable UBSan (undefined-behavior sanitization)" OFF)
+
+  if(${PROJECT_NAME_UPPER}_ENABLE_ASAN OR ${PROJECT_NAME_UPPER}_ENABLE_UBSAN)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-omit-frame-pointer")
+    set(SANITIZERS "")
+
+    if(${PROJECT_NAME_UPPER}_ENABLE_ASAN)
+      list(APPEND SANITIZERS "address")
+    endif()
+
+    if(${PROJECT_NAME_UPPER}_ENABLE_UBSAN)
+      list(APPEND SANITIZERS "undefined")
+    endif()
+
+    string(REPLACE ";" "," SANITIZERS "${SANITIZERS}")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=${SANITIZERS}")
+  endif()
+endif()
+
+# Allow disabling RTTI
+option(${PROJECT_NAME_UPPER}_ENABLE_RTTI "Enable runtime type information" ON)
+if(${PROJECT_NAME_UPPER}_ENABLE_RTTI)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -frtti")
+else()
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
+endif()
+
+# Allow disable Exceptions
+option(${PROJECT_NAME_UPPER}_ENABLE_EXCEPTIONS "Enable C++ exceptions" ON)
+if(${PROJECT_NAME_UPPER}_ENABLE_EXCEPTIONS)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexceptions")
+else()
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
+endif()
+
+# Export general C++ compiler flags
+set(
+  CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=native"
+  CACHE STRING "Flags used by the compiler during all builds."
+  FORCE
+  )
+
+# Export additional C++ compiler flags for debug builds
+set(
+  CMAKE_CXX_FLAGS_DEBUG "-g3"
+  CACHE STRING "Flags used by the compiler during debug builds."
+  FORCE
+  )
+
+# Export additional C++ compiler flags for release builds
+set(
+  CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG"
+  CACHE STRING "Flags used by the compiler during release builds."
+  FORCE
+  )
+
+# Export additional C++ compiler flags for release builds with debug information
+set(
+  CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELEASE} -g -DNDEBUG"
+  CACHE STRING "Flags used by the compiler during release builds with debug info."
+  FORCE
+  )
+
+# Export additional C++ compiler flags for minimum size release builds
+set(
+  CMAKE_CXX_FLAGS_MINSIZEREL "-Os -DNDEBUG"
+  CACHE STRING "Flags used by the compiler during release builds for minimum size."
+  FORCE
+  )
-- 
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