diff options
authorDylan Baker <>2018-04-16 14:47:58 -0700
committerDylan Baker <>2018-04-24 14:08:15 -0700
commitc5a97d658ec19cc02719d7f86c1b0715e3d9ffc4 (patch)
parent595021bf1a67346c7dfca652ef2dbcce3e2a6ca0 (diff)
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 <>
1 files changed, 7 insertions, 0 deletions
diff --git a/ b/
index 2e10ed74e29..4019b21dad1 100644
--- a/
+++ b/
@@ -1143,6 +1143,13 @@ if with_llvm
'-DHAVE_LLVM=0x0@0@0@1@'.format(_llvm_version[0], _llvm_version[1]),
+ # 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.')