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meson: fix builds against LLVM built without rtti 

Building without rtti is a frought with peril, but it's something that
autotools supports so we need to support it too.

Since we've moved to version 0.44 as a whole we can use the meson
functionality for accessing random llvm-config options we can check for
rtti and add -fno-rtti to all C++ code accordingly.

Signed-off-by: Dylan Baker <dylan.c.baker@intel.com>
This commit is contained in:
Dylan Baker 2018-04-16 14:47:58 -07:00
parent 595021bf1a
commit c5a97d658e
1 changed files with 7 additions and 0 deletions
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@ -1143,6 +1143,13 @@ if with_llvm
'-DHAVE_LLVM=0x0@0@0@1@'.format(_llvm_version[0], _llvm_version[1]),
'-DMESA_LLVM_VERSION_PATCH=@0@'.format(_llvm_patch),
]
# LLVM can be built without rtti, turning off rtti changes the ABI of C++
# programs, so we need to build all C++ code in mesa without rtti as well to
# ensure that linking works.
if dep_llvm.get_configtool_variable('has-rtti') == 'NO'
cpp_args('-fno-rtti')
endif
elif with_amd_vk or with_gallium_radeonsi or with_gallium_swr
error('The following drivers require LLVM: Radv, RadeonSI, SWR. One of these is enabled, but LLVM is disabled.')
endif