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Merging r213663:

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------------------------------------------------------------------------
r213663 | delcypher | 2014-07-22 16:41:18 +0100 (Tue, 22 Jul 2014) | 4 lines

Added LLVM_ENABLE_RTTI and LLVM_ENABLE_EH options that allow RTTI and EH
to globally be controlled. Individual targets (e.g.  ExceptionDemo) can
still override this by using LLVM_REQUIRE_RTTI and LLVM_REQUIRE_EH if
they need to be compiled with RTTI or exception handling respectively.
------------------------------------------------------------------------


git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_35@213764 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Liew 2014-07-23 15:19:01 +00:00
parent 6c00f26957
commit e48c582cfe
4 changed files with 27 additions and 3 deletions
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13
cmake/modules/AddLLVM.cmake
View File

@ -8,8 +8,13 @@ function(llvm_update_compile_flags name)
set(update_src_props ON) set(update_src_props ON)
endif() endif()
if(LLVM_REQUIRES_EH) # LLVM_REQUIRES_EH is an internal flag that individual
set(LLVM_REQUIRES_RTTI ON) # targets can use to force EH
if(LLVM_REQUIRES_EH OR LLVM_ENABLE_EH)
if(NOT (LLVM_REQUIRES_RTTI OR LLVM_ENABLE_RTTI))
message(AUTHOR_WARNING "Exception handling requires RTTI. Enabling RTTI for ${name}")
set(LLVM_REQUIRES_RTTI ON)
endif()
else() else()
if(LLVM_COMPILER_IS_GCC_COMPATIBLE) if(LLVM_COMPILER_IS_GCC_COMPATIBLE)
list(APPEND LLVM_COMPILE_FLAGS "-fno-exceptions") list(APPEND LLVM_COMPILE_FLAGS "-fno-exceptions")
@ -19,7 +24,9 @@ function(llvm_update_compile_flags name)
endif() endif()
endif() endif()
if(NOT LLVM_REQUIRES_RTTI) # LLVM_REQUIRES_RTTI is an internal flag that individual
# targets can use to force RTTI
if(NOT (LLVM_REQUIRES_RTTI OR LLVM_ENABLE_RTTI))
list(APPEND LLVM_COMPILE_DEFINITIONS GTEST_HAS_RTTI=0) list(APPEND LLVM_COMPILE_DEFINITIONS GTEST_HAS_RTTI=0)
if (LLVM_COMPILER_IS_GCC_COMPATIBLE) if (LLVM_COMPILER_IS_GCC_COMPATIBLE)
list(APPEND LLVM_COMPILE_FLAGS "-fno-rtti") list(APPEND LLVM_COMPILE_FLAGS "-fno-rtti")

7
cmake/modules/HandleLLVMOptions.cmake
View File

@ -408,6 +408,13 @@ if(MSVC)
string(REGEX REPLACE "(^| ) */GR-? *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") string(REGEX REPLACE "(^| ) */GR-? *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
endif() endif()
# Provide public options to globally control RTTI and EH
option(LLVM_ENABLE_EH "Enable Exception handling" OFF)
option(LLVM_ENABLE_RTTI "Enable run time type information" OFF)
if(LLVM_ENABLE_EH AND NOT LLVM_ENABLE_RTTI)
message(FATAL_ERROR "Exception handling requires RTTI. You must set LLVM_ENABLE_RTTI to ON")
endif()
# Plugin support # Plugin support
# FIXME: Make this configurable. # FIXME: Make this configurable.
if(WIN32 OR CYGWIN) if(WIN32 OR CYGWIN)

8
docs/CMake.rst
View File

@ -218,10 +218,18 @@ LLVM-specific variables
Enables code assertions. Defaults to OFF if and only if ``CMAKE_BUILD_TYPE`` Enables code assertions. Defaults to OFF if and only if ``CMAKE_BUILD_TYPE``
is *Release*. is *Release*.
**LLVM_ENABLE_EH**:BOOL
Build LLVM with exception handling support. This is necessary if you wish to
link against LLVM libraries and make use of C++ exceptions in your own code
that need to propagate through LLVM code. Defaults to OFF.
**LLVM_ENABLE_PIC**:BOOL **LLVM_ENABLE_PIC**:BOOL
Add the ``-fPIC`` flag for the compiler command-line, if the compiler supports Add the ``-fPIC`` flag for the compiler command-line, if the compiler supports
this flag. Some systems, like Windows, do not need this flag. Defaults to ON. this flag. Some systems, like Windows, do not need this flag. Defaults to ON.
**LLVM_ENABLE_RTTI**:BOOL
Build LLVM with run time type information. Defaults to OFF.
**LLVM_ENABLE_WARNINGS**:BOOL **LLVM_ENABLE_WARNINGS**:BOOL
Enable all compiler warnings. Defaults to ON. Enable all compiler warnings. Defaults to ON.

2
examples/ExceptionDemo/CMakeLists.txt
View File

@ -6,7 +6,9 @@ set(LLVM_LINK_COMPONENTS
nativecodegen nativecodegen
) )
# Enable EH and RTTI for this demo
set(LLVM_REQUIRES_EH 1) set(LLVM_REQUIRES_EH 1)
set(LLVM_REQUIRES_RTTI 1)
add_llvm_example(ExceptionDemo add_llvm_example(ExceptionDemo
ExceptionDemo.cpp ExceptionDemo.cpp