[Buildroot] [PATCH v2 1/4] package/llvm: add llvm RTTI option
Romain Naour
romain.naour at gmail.com
Sat Oct 5 09:48:15 UTC 2019
Allow to build LLVM with run-time type information
when this feature is needed (for example) by mesa3d's
Gallium Nouveau driver or the Clover OpenCL state
tracker when llvm support is enabled in mesa3d.
Signed-off-by: Romain Naour <romain.naour at gmail.com>
---
v2: rebase the patch on master
package/llvm/Config.in | 12 ++++++++++++
package/llvm/llvm.mk | 8 ++++++++
2 files changed, 20 insertions(+)
diff --git a/package/llvm/Config.in b/package/llvm/Config.in
index 83e94660eb..4eaca3df58 100644
--- a/package/llvm/Config.in
+++ b/package/llvm/Config.in
@@ -35,6 +35,18 @@ config BR2_PACKAGE_LLVM_AMDGPU
Build AMDGPU target. Select this option if you are going
to install mesa3d with llvm and use Gallium Radeon driver.
+config BR2_PACKAGE_LLVM_RTTI
+ bool "enable rtti"
+ help
+ Build LLVM with run-time type information. LLVM can be
+ built without rtti, but turning it off rtti changes the
+ ABI of C++ programs.
+ This features is needed to build the Gallium Nouveau
+ driver or the Clover OpenCL state tracker when llvm
+ support is enabled.
+
+ https://llvm.org/docs/HowToSetUpLLVMStyleRTTI.html
+
endif
comment "llvm needs a toolchain w/ wchar, threads, C++, gcc >= 4.8, host gcc >= 4.8, dynamic library"
diff --git a/package/llvm/llvm.mk b/package/llvm/llvm.mk
index f14b537d94..27a9f41860 100644
--- a/package/llvm/llvm.mk
+++ b/package/llvm/llvm.mk
@@ -216,6 +216,14 @@ LLVM_CONF_OPTS += \
-DLLVM_INCLUDE_TOOLS=ON \
-DLLVM_BUILD_TOOLS=OFF
+ifeq ($(BR2_PACKAGE_LLVM_RTTI),y)
+HOST_LLVM_CONF_OPTS += -DLLVM_ENABLE_RTTI=ON
+LLVM_CONF_OPTS += -DLLVM_ENABLE_RTTI=ON
+else
+HOST_LLVM_CONF_OPTS += -DLLVM_ENABLE_RTTI=OFF
+LLVM_CONF_OPTS += -DLLVM_ENABLE_RTTI=OFF
+endif
+
# Compiler-rt not in the source tree.
# llvm runtime libraries are not in the source tree.
# Polly is not in the source tree.
--
2.23.0
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