LLVM-7.0.0 and LLVM-8.0.0 linking failures on gentoo

[hjudt]

Hi,

in 5.0.0 branch you specified

c2ffi/CMakeLists.txt

Line 21 in 91fb8ad

llvm_map_components_to_libnames(llvm_libs core support mcparser option bitreader profiledata)

llvm_map_components_to_libnames(llvm_libs core support mcparser option bitreader profiledata)
message(STATUS "Using llvm libs: ${llvm_libs}")
and used these ${llvm_libs} in target_link_libraries

in 7.0.0 llvm_map_components has been removed and the target_link_libraries has been replaced by LLVM

c2ffi/CMakeLists.txt

Line 70 in b7fbea3

LLVM)

Same in 8.0.0. Both 7 and 8 now do no longer build on Gentoo because ld cannot find -lLLVM.

[hjudt]

`diff -Naur c2ffi-8.0.0~/CMakeLists.txt c2ffi-8.0.0/CMakeLists.txt
--- c2ffi-8.0.0~/CMakeLists.txt 2019-04-19 02:50:09.249266768 +0200
+++ c2ffi-8.0.0/CMakeLists.txt 2019-04-19 02:51:36.109265726 +0200
@@ -10,6 +10,7 @@
message(STATUS "LLVM installed in ${LLVM_INSTALL_PREFIX}")
message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
add_definitions(${LLVM_DEFINITIONS})
+llvm_map_components_to_libnames(llvm_libs core support mcparser option bitreader profiledata)
link_directories(${LLVM_INSTALL_PREFIX}/lib ${LLVM_INSTALL_PREFIX}/lib64)

set(CMAKE_CXX_STANDARD 11)
@@ -67,7 +68,7 @@
clangIndex
clangToolingCore
clangTooling

• LLVM)

• ${llvm_libs})

set(APP_BIN_DIR "${CMAKE_BINARY_DIR}/bin")
set_target_properties(c2ffi PROPERTIES`

[hjudt]

github won't let me upload the patch, but simply reverting the change mentioned above fixes compilation for me. I just don't know if all libnames are included that are required, but so far there have been no errors during building.

[rpav]

These auto-close now?

In any case, the above should fix this; someone needs to modernize LLVM cmake. Let me know if you still have troubles. Still seems to build on arch fine; someone on ubuntu will have to comment there.

[hjudt]

Yes, thank you, 8.0.0 builds fine now on gentoo.

[lockie]

Hey. Unfortunately I was getting linker errors (being unable to find -lclangFrontendTool and then -lLLVM) using 9.0.0 branch on Gentoo. Reverting to commit 9e49eb8 fixed the problem - built with no errors at all.

[rpav]

Can you create a gist and link it here with the contents/list-of-files gentoo installs with your LLVM/Clang?

[lockie]

Sure, here you go:

• LLVM 8 file list
• LLVM 9 file list