From 060f11df25fec4943c1b02e12969559445517660 Mon Sep 17 00:00:00 2001
From: Sylvestre Ledru <sylvestre@debian.org>
Date: Tue, 27 Dec 2022 12:43:58 +0100
Subject: [PATCH] fix the link issue on grpc

---
 debian/patches/link-grpc.diff | 49 +++++++++++++++++++++++++++++++++++
 debian/patches/series         |  1 +
 2 files changed, 50 insertions(+)
 create mode 100644 debian/patches/link-grpc.diff

diff --git a/debian/patches/link-grpc.diff b/debian/patches/link-grpc.diff
new file mode 100644
index 00000000..382f4d57
--- /dev/null
+++ b/debian/patches/link-grpc.diff
@@ -0,0 +1,49 @@
+Index: llvm-toolchain-snapshot_16~++20221227120055+36d70a6aea6b/cmake/Modules/FindGRPC.cmake
+===================================================================
+--- llvm-toolchain-snapshot_16~++20221227120055+36d70a6aea6b.orig/cmake/Modules/FindGRPC.cmake
++++ llvm-toolchain-snapshot_16~++20221227120055+36d70a6aea6b/cmake/Modules/FindGRPC.cmake
+@@ -82,11 +82,30 @@ else()
+     endif()
+   endif()
+   if(NOT TARGET grpc++)
+-    find_library(GRPC_LIBRARY grpc++ ${GRPC_OPTS} REQUIRED)
++    find_library(GRPCPP_LIBRARY grpc++ ${GRPC_OPTS} REQUIRED)
+     add_library(grpc++ UNKNOWN IMPORTED GLOBAL)
+-    message(STATUS "Using grpc++: " ${GRPC_LIBRARY})
+-    set_target_properties(grpc++ PROPERTIES IMPORTED_LOCATION ${GRPC_LIBRARY})
++    message(STATUS "Using grpc++: " ${GRPCPP_LIBRARY})
++    set_target_properties(grpc++ PROPERTIES IMPORTED_LOCATION ${GRPCPP_LIBRARY})
+     target_include_directories(grpc++ INTERFACE ${GRPC_INCLUDE_PATHS})
++
++    # On some distro (ex: Debian/Ubuntu), libgrpc++ doesn't have direct references
++    # to it dependencies. Needs to link against gpr, grpc and absl_synchronization
++    find_library(GPR_LIBRARY gpr ${GRPC_OPTS} REQUIRED)
++    add_library(gpr UNKNOWN IMPORTED GLOBAL)
++    message(STATUS "Using gpr: " ${GPR_LIBRARY})
++    set_target_properties(gpr PROPERTIES IMPORTED_LOCATION ${GPR_LIBRARY})
++
++    find_library(GRPC_LIBRARY grpc ${GRPC_OPTS} REQUIRED)
++    add_library(grpc UNKNOWN IMPORTED GLOBAL)
++    message(STATUS "Using grpc: " ${GRPC_LIBRARY})
++    set_target_properties(grpc PROPERTIES IMPORTED_LOCATION ${GRPC_LIBRARY})
++
++    find_library(ABSL_SYNCHRONIZATION_LIBRARY absl_synchronization ${GRPC_OPTS} REQUIRED)
++    add_library(absl_synchronization UNKNOWN IMPORTED GLOBAL)
++    message(STATUS "Using absl_synchronization: " ${ABSL_SYNCHRONIZATION})
++    set_target_properties(absl_synchronization PROPERTIES IMPORTED_LOCATION ${ABSL_SYNCHRONIZATION_LIBRARY})
++
++
+     if (ENABLE_GRPC_REFLECTION)
+       find_library(GRPC_REFLECTION_LIBRARY grpc++_reflection ${GRPC_OPTS} REQUIRED)
+       add_library(grpc++_reflection UNKNOWN IMPORTED GLOBAL)
+Index: llvm-toolchain-snapshot_16~++20221227120055+36d70a6aea6b/clang/cmake/modules/AddGRPC.cmake
+===================================================================
+--- llvm-toolchain-snapshot_16~++20221227120055+36d70a6aea6b.orig/clang/cmake/modules/AddGRPC.cmake
++++ llvm-toolchain-snapshot_16~++20221227120055+36d70a6aea6b/clang/cmake/modules/AddGRPC.cmake
+@@ -7,5 +7,5 @@ function(generate_clang_protos_library L
+ 
+   add_clang_library(${LibraryName} ${ProtoSource}
+     PARTIAL_SOURCES_INTENDED
+-    LINK_LIBS PUBLIC grpc++ protobuf)
++    LINK_LIBS PUBLIC grpc++ protobuf gpr grpc absl_synchronization)
+ endfunction()
diff --git a/debian/patches/series b/debian/patches/series
index 2771fe7a..875a634e 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -146,3 +146,4 @@ revert-update-doc.diff
 unwind-force-pthread-dl.diff
 force-sse2-compiler-rt.diff
 bolt-disable-emit-relocs.patch
+link-grpc.diff