Build failure when clang isn't default compiler #4
Comments
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Whoops, looks like an issue in the documentation. Which version of clang are you using to build, and can you give the specific errors clang spits out? |
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I'm using clang 6.0.1. All basic file not found errors: I didn't look close enough to figure out how it is killing off the standard include paths.
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I experience the problem on ubuntu 18.04. |
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Thanks for reporting this issue. We only support compiling with I'll fix the docs, it's supposed to prefix cmake with |
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I just updated the README, please let me know if installing |
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On ubuntu 18.04, installing libc++-dev and libc++abi-dev makes the compilation work. Now I get link errors though: |
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Same issue here using the same setup. |
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You can fix this by passing |
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BTW if anybody know how to make this work properly, I'm all ears. I made linking against |
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I did manage to get the release build to link on fedora by commenting out the It is unclear why it wasn't finding the static libraries (I installed libstdc++-static-8.1.1-5.fc28.x86_64). My initial problem was caused by a missing libstdc++ devel package (I just assumed it had be installed previously). |
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The static link is there only for us when we need to distribute binaries. For your own machine... :)) |
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Same issue on Ubuntu 18.04, but work around resolved it. As for a proper fix I didn't have enough free time to take a look. Why do development on Ubuntu 14.04? It would seem to be easier to do Vulkan dev on a distro that's not so close to EOL. Even its replacement Ubuntu 16.04 is going maintenance only this year (2018). |
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Just got the build to work on Ubuntu 18.04. In addition to following the instructions in the readme for setting the compiler to Clang, I needed to pass the Might be worth adding |
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@thendrix This particular CI infrastructure uses Ubuntu 14, I do not control this. We actually develop on Debian Rodete. @RoryDungan The README already mentions that |
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It would be useful to check the minimum versions in the CMake. Somehow I missed that in the docs. It took a few tweaks to build on Ubuntu 16.04. Starting with d9ba399, I followed these steps: # install dependencies
sudo apt install cmake ninja-build clang-6.0 libglu1-mesa-dev libc++-dev libc++abi-dev libxi-dev
# apply patch to fix compile/link errors
git apply <<'EOF'
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8ca0d25..5fa5c27 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,13 +74,14 @@ endif()
if (LINUX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -isystem /usr/include/libcxxabi")
if (FILAMENT_REQUIRES_CXXABI)
# Required in CI environment with custom libc++ and libc++abi
link_libraries("-lc++abi")
endif()
# To distribute our binaries, we must remove the dependency on libc++ and libgcc.
if (CMAKE_BUILD_TYPE STREQUAL "Release")
- link_libraries("-static-libgcc -static-libstdc++")
+# link_libraries("-static-libgcc -static-libstdc++")
endif()
else()
if (FILAMENT_REQUIRES_CXXABI)
EOF
# configure
CC=/usr/bin/clang-6.0 CXX=/usr/bin/clang++-6.0 cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=out/release/filament -DFILAMENT_REQUIRES_CXXABI=true -H. -Bout/cmake-release -G Ninja
# build
ninja -C out/cmake-release |
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The README does specify that clang 5.0 is the minimum. |
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Opps. I saw that just after I posted and I edited my comment, but you're way too fast! |
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Thanks to @cgmb the readme now checks whether clang is the compiler and that it is the right version. |
The commands in the readme Linux section says:
But the following command matches the one above.
I tried the obvious to set CC to /usr/bin/clang and CXX to /usr/bin/clang++ prior to running cmake. cmake completes, but the build fails with some fairly basic #include file not found errors (things like and ).
I'm building on Fedora 28 x86_64.
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