Merge 5796438e86 into 1e95a5944b

Fixes https://github.com/clangd/clangd/issues/2415

.github/workflows/autobuild.yaml

@@ -179,7 +179,7 @@ jobs:
           container: ubuntu:20.04
           preinstall: >-
             apt-get update &&
-            apt-get install -y ninja-build libz-dev libc-ares-dev wget clang-9
+            apt-get install -y ninja-build libz-dev libc-ares-dev wget clang-10
             software-properties-common p7zip-full curl &&
             add-apt-repository ppa:git-core/ppa &&
             wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | apt-key add - &&
@@ -188,8 +188,8 @@ jobs:
             apt-get install -y git cmake python3.8 python3.8-dev
           cflags: -O3 -gline-tables-only -DNDEBUG -include $GITHUB_WORKSPACE/.github/workflows/lib_compat.h
           cmake: >-
-            "-DCMAKE_C_COMPILER=clang-9"
-            "-DCMAKE_CXX_COMPILER=clang++-9"
+            "-DCMAKE_C_COMPILER=clang-10"
+            "-DCMAKE_CXX_COMPILER=clang++-10"
             "-DCMAKE_EXE_LINKER_FLAGS_RELEASE=-static-libgcc -Wl,--compress-debug-sections=zlib"
             "-DLLVM_STATIC_LINK_CXX_STDLIB=ON"
             "-DLLVM_ENABLE_ZLIB=FORCE_ON"
@@ -300,6 +300,12 @@ jobs:
       run: >
         ninja -C ${{ env.CLANGD_DIR }} clangd clangd-indexer clangd-index-server
         clangd-index-server-monitor
+    # Install targets so that RUNPATHs get properly substituted.
+    # FIXME: We don't have other targets besides clangd. We probably want them too.
+    - name: Install
+      run: >
+        cmake --install ${{ env.CLANGD_DIR }} --prefix ${{ env.CLANGD_DIR }}
+        "--component=clangd"
     - name: Install OpenMP headers
       shell: bash
       run: >