X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=cmake%2Fmodules%2FHandleLLVMOptions.cmake;h=487b2e45808fe53fb67f3e4b2e49b510083c44bf;hp=0633ac9e3a5b158af6ee6e6f5908744c07873a4c;hb=e89e31275306295457d92d2406c2ead571736683;hpb=05a5ff1f00c30a68a151342bf7c47bf86d555d57

diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
index 0633ac9e3a5..487b2e45808 100644
--- a/cmake/modules/HandleLLVMOptions.cmake
+++ b/cmake/modules/HandleLLVMOptions.cmake
@@ -1,35 +1,75 @@
+# This CMake module is responsible for interpreting the user defined LLVM_
+# options and executing the appropriate CMake commands to realize the users'
+# selections.
+
 include(AddLLVMDefinitions)
+include(CheckCCompilerFlag)
+include(CheckCXXCompilerFlag)
 
-# Run-time build mode; It is used for unittests.
-if(MSVC_IDE)
-  # Expect "$(Configuration)", "$(OutDir)", etc.
-  # It is expanded by msbuild or similar.
-  set(RUNTIME_BUILD_MODE "${CMAKE_CFG_INTDIR}")
-elseif(NOT CMAKE_BUILD_TYPE STREQUAL "")
-  # Expect "Release" "Debug", etc.
-  # Or unittests could not run.
-  set(RUNTIME_BUILD_MODE ${CMAKE_BUILD_TYPE})
-else()
-  # It might be "."
-  set(RUNTIME_BUILD_MODE "${CMAKE_CFG_INTDIR}")
+if( CMAKE_COMPILER_IS_GNUCXX )
+  set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
+elseif( MSVC )
+  set(LLVM_COMPILER_IS_GCC_COMPATIBLE OFF)
+elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
+  set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
 endif()
 
-set(LIT_ARGS_DEFAULT "-sv")
-if (MSVC OR XCODE)
-  set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
+if(NOT LLVM_FORCE_USE_OLD_TOOLCHAIN)
+  if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
+      message(FATAL_ERROR "Host GCC version must be at least 4.7!")
+    endif()
+  elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+    if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.1)
+      message(FATAL_ERROR "Host Clang version must be at least 3.1!")
+    endif()
+
+    # Also test that we aren't using too old of a version of libstdc++ with the
+    # Clang compiler. This is tricky as there is no real way to check the
+    # version of libstdc++ directly. Instead we test for a known bug in
+    # libstdc++4.6 that is fixed in libstdc++4.7.
+    if(NOT LLVM_ENABLE_LIBCXX)
+      set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
+      set(OLD_CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
+      set(CMAKE_REQUIRED_FLAGS "-std=c++0x")
+      if (ANDROID)
+        set(CMAKE_REQUIRED_LIBRARIES "atomic")
+      endif()
+      check_cxx_source_compiles("
+#include <atomic>
+std::atomic<float> x(0.0f);
+int main() { return (float)x; }"
+        LLVM_NO_OLD_LIBSTDCXX)
+      if(NOT LLVM_NO_OLD_LIBSTDCXX)
+        message(FATAL_ERROR "Host Clang must be able to find libstdc++4.7 or newer!")
+      endif()
+      set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
+      set(CMAKE_REQUIRED_LIBRARIES ${OLD_CMAKE_REQUIRED_LIBRARIES})
+    endif()
+  elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+    if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 17.0)
+      message(FATAL_ERROR "Host Visual Studio must be at least 2012 (MSVC 17.0)")
+    endif()
+  endif()
 endif()
-set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}"
-    CACHE STRING "Default options for lit")
 
 if( LLVM_ENABLE_ASSERTIONS )
   # MSVC doesn't like _DEBUG on release builds. See PR 4379.
   if( NOT MSVC )
     add_definitions( -D_DEBUG )
   endif()
-  # On Release builds cmake automatically defines NDEBUG, so we
+  # On non-Debug builds cmake automatically defines NDEBUG, so we
   # explicitly undefine it:
-  if( uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
+  if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
     add_definitions( -UNDEBUG )
+    # Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
+    set(REGEXP_NDEBUG "(^| )[/-]D *NDEBUG($| )")
+    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
+      CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
+    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
+      CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
+    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
+      CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}")
   endif()
 else()
   if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
@@ -40,18 +80,14 @@ else()
 endif()
 
 if(WIN32)
+  set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
   if(CYGWIN)
     set(LLVM_ON_WIN32 0)
     set(LLVM_ON_UNIX 1)
   else(CYGWIN)
     set(LLVM_ON_WIN32 1)
     set(LLVM_ON_UNIX 0)
-
-    # This is effective only on Win32 hosts to use gnuwin32 tools.
-    set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
   endif(CYGWIN)
-  set(LTDL_SHLIB_EXT ".dll")
-  set(EXEEXT ".exe")
   # Maximum path length is 160 for non-unicode paths
   set(MAXPATHLEN 160)
 else(WIN32)
@@ -59,11 +95,10 @@ else(WIN32)
     set(LLVM_ON_WIN32 0)
     set(LLVM_ON_UNIX 1)
     if(APPLE)
-      set(LTDL_SHLIB_EXT ".dylib")
+      set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
     else(APPLE)
-      set(LTDL_SHLIB_EXT ".so")
+      set(LLVM_HAVE_LINK_VERSION_SCRIPT 1)
     endif(APPLE)
-    set(EXEEXT "")
     # FIXME: Maximum path length is currently set to 'safe' fixed value
     set(MAXPATHLEN 2024)
   else(UNIX)
@@ -71,40 +106,76 @@ else(WIN32)
   endif(UNIX)
 endif(WIN32)
 
+set(EXEEXT ${CMAKE_EXECUTABLE_SUFFIX})
+set(LTDL_SHLIB_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
+set(LLVM_PLUGIN_EXT ${CMAKE_SHARED_MODULE_SUFFIX})
+
+function(add_flag_or_print_warning flag)
+  check_c_compiler_flag(${flag} C_SUPPORTS_FLAG)
+  check_cxx_compiler_flag(${flag} CXX_SUPPORTS_FLAG)
+  if (C_SUPPORTS_FLAG AND CXX_SUPPORTS_FLAG)
+    message(STATUS "Building with ${flag}")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" PARENT_SCOPE)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" PARENT_SCOPE)
+  else()
+    message(WARNING "${flag} is not supported.")
+  endif()
+endfunction()
+
+function(append value)
+  foreach(variable ${ARGN})
+    set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
+  endforeach(variable)
+endfunction()
+
+function(append_if condition value)
+  if (${condition})
+    foreach(variable ${ARGN})
+      set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
+    endforeach(variable)
+  endif()
+endfunction()
+
+macro(add_flag_if_supported flag)
+  check_c_compiler_flag(${flag} C_SUPPORTS_FLAG)
+  append_if(C_SUPPORTS_FLAG "${flag}" CMAKE_C_FLAGS)
+  check_cxx_compiler_flag(${flag} CXX_SUPPORTS_FLAG)
+  append_if(CXX_SUPPORTS_FLAG "${flag}" CMAKE_CXX_FLAGS)
+endmacro()
+
 if( LLVM_ENABLE_PIC )
   if( XCODE )
     # Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't
     # know how to disable this, so just force ENABLE_PIC off for now.
     message(WARNING "-fPIC not supported with Xcode.")
-  elseif( WIN32 )
+  elseif( WIN32 OR CYGWIN)
     # On Windows all code is PIC. MinGW warns if -fPIC is used.
   else()
-    include(CheckCXXCompilerFlag)
-    check_cxx_compiler_flag("-fPIC" SUPPORTS_FPIC_FLAG)
-    if( SUPPORTS_FPIC_FLAG )
-      message(STATUS "Building with -fPIC")
-      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
-      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
-    else( SUPPORTS_FPIC_FLAG )
-      message(WARNING "-fPIC not supported.")
+    add_flag_or_print_warning("-fPIC")
+
+    if( WIN32 OR CYGWIN)
+      # MinGW warns if -fvisibility-inlines-hidden is used.
+    else()
+      check_cxx_compiler_flag("-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG)
+      append_if(SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG "-fvisibility-inlines-hidden" CMAKE_CXX_FLAGS)
     endif()
   endif()
 endif()
 
 if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
   # TODO: support other platforms and toolchains.
-  option(LLVM_BUILD_32_BITS "Build 32 bits executables and libraries." OFF)
   if( LLVM_BUILD_32_BITS )
     message(STATUS "Building 32 bits executables and libraries.")
     add_llvm_definitions( -m32 )
-    list(APPEND CMAKE_EXE_LINKER_FLAGS -m32)
-    list(APPEND CMAKE_SHARED_LINKER_FLAGS -m32)
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -m32")
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -m32")
+    set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -m32")
   endif( LLVM_BUILD_32_BITS )
 endif( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
 
-if( MSVC_IDE AND ( MSVC90 OR MSVC10 ) )
-  # Only Visual Studio 2008 and 2010 officially supports /MP.
-  # Visual Studio 2005 do support it but it's experimental there.
+# On Win32 using MS tools, provide an option to set the number of parallel jobs
+# to use.
+if( MSVC_IDE )
   set(LLVM_COMPILER_JOBS "0" CACHE STRING
     "Number of parallel compiler jobs. 0 means use all processors. Default is 0.")
   if( NOT LLVM_COMPILER_JOBS STREQUAL "1" )
@@ -128,6 +199,25 @@ endif()
 if( MSVC )
   include(ChooseMSVCCRT)
 
+  if( NOT (${CMAKE_VERSION} VERSION_LESS 2.8.11) )
+    # set stack reserved size to ~10MB
+    # CMake previously automatically set this value for MSVC builds, but the
+    # behavior was changed in CMake 2.8.11 (Issue 12437) to use the MSVC default
+    # value (1 MB) which is not enough for us in tasks such as parsing recursive
+    # C++ templates in Clang.
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /STACK:10000000")
+  endif()
+
+  if( MSVC10 )
+    # MSVC 10 will complain about headers in the STL not being exported, but
+    # will not complain in MSVC 11.
+    add_llvm_definitions(
+      -wd4275 # Suppress 'An exported class was derived from a class that was not exported.'
+    )
+  elseif( MSVC11 )
+    add_llvm_definitions(-D_VARIADIC_MAX=10)
+  endif()
+  
   # Add definitions that make MSVC much less annoying.
   add_llvm_definitions(
     # For some reason MS wants to deprecate a bunch of standard functions...
@@ -138,28 +228,29 @@ if( MSVC )
     -D_SCL_SECURE_NO_DEPRECATE
     -D_SCL_SECURE_NO_WARNINGS
 
+    # Disabled warnings.
     -wd4146 # Suppress 'unary minus operator applied to unsigned type, result still unsigned'
     -wd4180 # Suppress 'qualifier applied to function type has no meaning; ignored'
-    -wd4224 # Suppress 'nonstandard extension used : formal parameter 'identifier' was previously defined as a type'
     -wd4244 # Suppress ''argument' : conversion from 'type1' to 'type2', possible loss of data'
     -wd4267 # Suppress ''var' : conversion from 'size_t' to 'type', possible loss of data'
-    -wd4275 # Suppress 'An exported class was derived from a class that was not exported.'
-    -wd4291 # Suppress ''declaration' : no matching operator delete found; memory will not be freed if initialization throws an exception'
     -wd4345 # Suppress 'behavior change: an object of POD type constructed with an initializer of the form () will be default-initialized'
     -wd4351 # Suppress 'new behavior: elements of array 'array' will be default initialized'
     -wd4355 # Suppress ''this' : used in base member initializer list'
     -wd4503 # Suppress ''identifier' : decorated name length exceeded, name was truncated'
     -wd4624 # Suppress ''derived class' : destructor could not be generated because a base class destructor is inaccessible'
-    -wd4715 # Suppress ''function' : not all control paths return a value'
     -wd4800 # Suppress ''type' : forcing value to bool 'true' or 'false' (performance warning)'
-    -wd4065 # Suppress 'switch statement contains 'default' but no 'case' labels'
-    -wd4181 # Suppress 'qualifier applied to reference type; ignored'
-    -w14062 # Promote "enumerator in switch of enum is not handled" to level 1 warning.
+    -wd4291 # Suppress ''declaration' : no matching operator delete found; memory will not be freed if initialization throws an exception'
+    
+    # Promoted warnings.
+    -w14062 # Promote 'enumerator in switch of enum is not handled' to level 1 warning.
+
+    # Promoted warnings to errors.
+    -we4238 # Promote 'nonstandard extension used : class rvalue used as lvalue' to error.
     )
 
   # Enable warnings
   if (LLVM_ENABLE_WARNINGS)
-    add_llvm_definitions( /W4 /Wall )
+    add_llvm_definitions( /W4 )
     if (LLVM_ENABLE_PEDANTIC)
       # No MSVC equivalent available
     endif (LLVM_ENABLE_PEDANTIC)
@@ -167,19 +258,112 @@ if( MSVC )
   if (LLVM_ENABLE_WERROR)
     add_llvm_definitions( /WX )
   endif (LLVM_ENABLE_WERROR)
-elseif( CMAKE_COMPILER_IS_GNUCXX )
+elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
   if (LLVM_ENABLE_WARNINGS)
-    add_llvm_definitions( -Wall -W -Wno-unused-parameter -Wwrite-strings )
-    if (LLVM_ENABLE_PEDANTIC)
-      add_llvm_definitions( -pedantic -Wno-long-long )
-    endif (LLVM_ENABLE_PEDANTIC)
+    append("-Wall -W -Wno-unused-parameter -Wwrite-strings" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+
+    # Turn off missing field initializer warnings for gcc to avoid noise from
+    # false positives with empty {}. Turn them on otherwise (they're off by
+    # default for clang).
+    check_cxx_compiler_flag("-Wmissing-field-initializers" CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG)
+    if (CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG)
+      if (CMAKE_COMPILER_IS_GNUCXX)
+        append("-Wno-missing-field-initializers" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+      else()
+        append("-Wmissing-field-initializers" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+      endif()
+    endif()
+
+    append_if(LLVM_ENABLE_PEDANTIC "-pedantic -Wno-long-long" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+    check_cxx_compiler_flag("-Werror -Wcovered-switch-default" CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG)
+    append_if(CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG "-Wcovered-switch-default" CMAKE_CXX_FLAGS)
+    check_c_compiler_flag("-Werror -Wcovered-switch-default" C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG)
+    append_if(C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG "-Wcovered-switch-default" CMAKE_C_FLAGS)
+    append_if(USE_NO_UNINITIALIZED "-Wno-uninitialized" CMAKE_CXX_FLAGS)
+    append_if(USE_NO_MAYBE_UNINITIALIZED "-Wno-maybe-uninitialized" CMAKE_CXX_FLAGS)
+    check_cxx_compiler_flag("-Werror -Wnon-virtual-dtor" CXX_SUPPORTS_NON_VIRTUAL_DTOR_FLAG)
+    append_if(CXX_SUPPORTS_NON_VIRTUAL_DTOR_FLAG "-Wnon-virtual-dtor" CMAKE_CXX_FLAGS)
   endif (LLVM_ENABLE_WARNINGS)
   if (LLVM_ENABLE_WERROR)
     add_llvm_definitions( -Werror )
   endif (LLVM_ENABLE_WERROR)
+  if (LLVM_ENABLE_CXX11)
+    check_cxx_compiler_flag("-std=c++11" CXX_SUPPORTS_CXX11)
+    append_if(CXX_SUPPORTS_CXX11 "-std=c++11" CMAKE_CXX_FLAGS)
+  endif (LLVM_ENABLE_CXX11)
+  if(LLVM_ENABLE_LIBCXX)
+    check_cxx_compiler_flag("-stdlib=libc++" CXX_SUPPORTS_STDLIB)
+    append_if(CXX_SUPPORTS_STDLIB "-stdlib=libc++" CMAKE_CXX_FLAGS)
+    append_if(CXX_SUPPORTS_STDLIB "-stdlib=libc++" CMAKE_EXE_LINKER_FLAGS)
+    append_if(CXX_SUPPORTS_STDLIB "-stdlib=libc++" CMAKE_SHARED_LINKER_FLAGS)
+    append_if(CXX_SUPPORTS_STDLIB "-stdlib=libc++" CMAKE_MODULE_LINKER_FLAGS)
+  endif ()
 endif( MSVC )
 
-add_llvm_definitions( -D__STDC_LIMIT_MACROS )
+macro(append_common_sanitizer_flags)
+  # Append -fno-omit-frame-pointer and turn on debug info to get better
+  # stack traces.
+  add_flag_if_supported("-fno-omit-frame-pointer")
+  if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
+      NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
+    add_flag_if_supported("-gline-tables-only")
+  endif()
+  # Use -O1 even in debug mode, otherwise sanitizers slowdown is too large.
+  if (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
+    add_flag_if_supported("-O1")
+  endif()
+endmacro()
+
+# Turn on sanitizers if necessary.
+if(LLVM_USE_SANITIZER)
+  if (LLVM_ON_UNIX)
+    if (LLVM_USE_SANITIZER STREQUAL "Address")
+      append_common_sanitizer_flags()
+      add_flag_or_print_warning("-fsanitize=address")
+    elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?")
+      append_common_sanitizer_flags()
+      add_flag_or_print_warning("-fsanitize=memory")
+      if(LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins")
+        add_flag_or_print_warning("-fsanitize-memory-track-origins")
+      endif()
+    else()
+      message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}")
+    endif()
+  else()
+    message(WARNING "LLVM_USE_SANITIZER is not supported on this platform.")
+  endif()
+endif()
+
+# Turn on -gsplit-dwarf if requested
+if(LLVM_USE_SPLIT_DWARF)
+  add_llvm_definitions("-gsplit-dwarf")
+endif()
+
 add_llvm_definitions( -D__STDC_CONSTANT_MACROS )
+add_llvm_definitions( -D__STDC_FORMAT_MACROS )
+add_llvm_definitions( -D__STDC_LIMIT_MACROS )
 
-option(LLVM_INCLUDE_TESTS "Generate build targets for the LLVM unit tests." ON)
+# clang doesn't print colored diagnostics when invoked from Ninja
+if (UNIX AND
+    CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND
+    CMAKE_GENERATOR STREQUAL "Ninja")
+  append("-fcolor-diagnostics" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+endif()
+
+# Add flags for add_dead_strip().
+# FIXME: With MSVS, consider compiling with /Gy and linking with /OPT:REF?
+# But MinSizeRel seems to add that automatically, so maybe disable these
+# flags instead if LLVM_NO_DEAD_STRIP is set.
+if(NOT CYGWIN AND NOT WIN32)
+  if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+    append("-ffunction-sections -fdata-sections" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+  endif()
+endif()
+
+if(MSVC)
+  # Remove flags here, for exceptions and RTTI.
+  # Each target property of source proerty should be responsible to control them.
+  # CL.EXE complains to override flags like "/GR /GR-".
+  string(REGEX REPLACE "(^| ) */EH[-cs]+ *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+  string(REGEX REPLACE "(^| ) */GR-? *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+endif()