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Added workaround for clang version

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This commit is contained in:
Tycho 2014-09-06 16:30:04 +01:00
parent 5fa206a420
commit 562b2d1d1d
2 changed files with 16 additions and 5 deletions
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2
CMakeLists.txt
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@ -1,4 +1,4 @@
cmake_minimum_required (VERSION 2.8.10)
cmake_minimum_required (VERSION 2.8.7)
# Without this, the MSVC variable isn't defined for MSVC builds ( http://www.cmake.org/pipermail/cmake/2011-November/047130.html )
enable_language(CXX C)

19
SetFlags.cmake
View File

@ -205,6 +205,16 @@ macro(enable_profile)
endif()
endmacro()
#this is a hack because we can't use cmake 2.8.10 because of travis
macro(get_clang_version)
execute_process(
COMMAND "${CMAKE_CXX_COMPILER}" "--version"
OUTPUT_VARIABLE CLANG_VERSION_OUTPUT)
message(${CLANG_VERSION_OUTPUT})
string(REGEX MATCH "version ([0-9]\\.[0-9])" x ${CLANG_VERSION_OUTPUT})
set(CLANG_VERSION ${CMAKE_MATCH_1})
endmacro()
macro(set_exe_flags)
# Remove disabling the maximum warning level:
# clang does not like a command line that reads -Wall -Wextra -w -Wall -Wextra and does not output any warnings
@ -223,8 +233,9 @@ macro(set_exe_flags)
add_flags_cxx("-ffast-math")
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
if ("${CMAKE_CXX_COMPILER_VERSION}" VERSION_LESS 3.0)
message(FATAL_ERROR "MCServer requires clang version 3.0 or higher, version is ${CMAKE_CXX_COMPILER_VERSION}")
get_clang_version()
if ("${CLANG_VERSION}" VERSION_LESS 3.0)
message(FATAL_ERROR "MCServer requires clang version 3.0 or higher, version is ${CLANG_VERSION}")
endif()
# clang does not provide the __extern_always_inline macro and a part of libm depends on this when using fast-math
add_flags_cxx("-D__extern_always_inline=inline")
@ -236,12 +247,12 @@ macro(set_exe_flags)
add_flags_cxx("-Wno-error=shadow -Wno-error=old-style-cast -Wno-error=global-constructors")
add_flags_cxx("-Wno-error=exit-time-destructors")
add_flags_cxx("-Wno-weak-vtables -Wno-switch-enum")
if ("${CMAKE_CXX_COMPILER_VERSION}" VERSION_GREATER 3.0)
if ("${CLANG_VERSION}" VERSION_GREATER 3.0)
# flags that are not present in 3.0
add_flags_cxx("-Wno-error=covered-switch-default -Wno-error=missing-variable-declarations")
add_flags_cxx("-Wno-implicit-fallthrough -Wno-error=extra-semi")
endif()
if ("${CMAKE_CXX_COMPILER_VERSION}" VERSION_GREATER 3.1)
if ("${CLANG_VERSION}" VERSION_GREATER 3.1)
# flags introduced in 3.2
add_flags_cxx("-Wno-documentation")
endif()