buildroot/package/grpc/0002-Add-option-to-restrict-building-of-host-grpc-to-grpc.patch

From fd7f0877e1e4f2305946a5579353d252012ea9e8 Mon Sep 17 00:00:00 2001
From: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Date: Tue, 25 May 2021 14:55:23 +0200
Subject: [PATCH] Add option to restrict building of (host-)grpc to
 grpc_cpp_plugin only.

This avoids unnecessary dependencies on big packages like libabseil-cpp and
others.

Upstream: not accepted (see https://github.com/grpc/grpc/issues/25322)

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

Updated for 1.76.0:
[build utf8_range_lib as it is now explicitly required]
Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
[Bernd: rebased for 1.80.0]
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
---
 CMakeLists.txt | 39 +++++++++++++++++++++++++++++++++------
 1 file changed, 33 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bc86c00463..08441ddbd2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -50,12 +50,16 @@ set(gRPC_BUILD_MSVC_MP_COUNT 0 CACHE STRING "The maximum number of processes for
 option(gRPC_BUILD_TESTS "Build tests" OFF)
 option(gRPC_BUILD_CODEGEN "Build codegen" ON)
 option(gRPC_DOWNLOAD_ARCHIVES "Download archives for empty 3rd party directories" ON)
+option(gRPC_BUILD_PLUGIN_SUPPORT_ONLY "Build plugin support only" OFF)
 
 set(gRPC_INSTALL_default ON)
 if(NOT CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
   # Disable gRPC_INSTALL by default if building as a submodule
   set(gRPC_INSTALL_default OFF)
 endif()
+if(gRPC_BUILD_PLUGIN_SUPPORT_ONLY)
+  set(gRPC_INSTALL_default OFF)
+endif()
 set(gRPC_INSTALL ${gRPC_INSTALL_default} CACHE BOOL
     "Generate installation target")
 
@@ -689,6 +693,8 @@ add_custom_target(plugins
   DEPENDS ${_gRPC_PLUGIN_LIST}
 )
 
+if (NOT gRPC_BUILD_PLUGIN_SUPPORT_ONLY)
+
 add_custom_target(tools_c
   DEPENDS
 )
@@ -700,6 +706,8 @@ add_custom_target(tools_cxx
 add_custom_target(tools
   DEPENDS tools_c tools_cxx)
 
+endif() # gRPC_BUILD_PLUGIN_SUPPORT_ONLY
+
 protobuf_generate_grpc_cpp_with_import_path_correction(
   src/core/ext/transport/chaotic_good/chaotic_good_frame.proto src/core/ext/transport/chaotic_good/chaotic_good_frame.proto
 )
@@ -1986,7 +1994,7 @@ if(gRPC_BUILD_TESTS)
     DEPENDS buildtests_c buildtests_cxx)
 endif()
 
-
+if (NOT gRPC_BUILD_PLUGIN_SUPPORT_ONLY)
 
 add_library(address_sorting
   third_party/address_sorting/address_sorting.c
@@ -3221,6 +3229,8 @@ if(gRPC_INSTALL)
   )
 endif()
 
+endif() # gRPC_BUILD_PLUGIN_SUPPORT_ONLY
+
 if(gRPC_BUILD_TESTS)
 
 add_library(grpc_test_util
@@ -3371,6 +3381,8 @@ endif()
 
 endif()
 
+if(NOT gRPC_BUILD_PLUGIN_SUPPORT_ONLY)
+
 add_library(grpc_unsecure
   src/core/call/call_arena_allocator.cc
   src/core/call/call_filters.cc
@@ -3951,6 +3963,8 @@ if(gRPC_INSTALL)
   )
 endif()
 
+endif() # gRPC_BUILD_PLUGIN_SUPPORT_ONLY
+
 if(gRPC_BUILD_TESTS)
 
 add_library(gtest
@@ -4025,6 +4039,8 @@ target_link_libraries(gtest
 
 endif()
 
+if(NOT gRPC_BUILD_PLUGIN_SUPPORT_ONLY)
+
 add_library(upb_base_lib
   third_party/upb/upb/base/status.c
 )
@@ -4641,6 +4657,7 @@ if(gRPC_INSTALL)
   )
 endif()
 
+endif() # gRPC_BUILD_PLUGIN_SUPPORT_ONLY
 
 add_library(utf8_range_lib
   third_party/utf8_range/utf8_range.c
@@ -4681,7 +4698,7 @@ target_link_libraries(utf8_range_lib
   ${_gRPC_ALLTARGETS_LIBRARIES}
 )
 
-
+if (NOT gRPC_BUILD_PLUGIN_SUPPORT_ONLY)
 
 if(gRPC_INSTALL)
   install(TARGETS utf8_range_lib EXPORT gRPCTargets
@@ -4692,6 +4709,8 @@ if(gRPC_INSTALL)
   )
 endif()
 
+endif() # gRPC_BUILD_PLUGIN_SUPPORT_ONLY
+
 if(gRPC_BUILD_TESTS)
 
 if(gRPC_BUILD_CODEGEN)
@@ -4784,6 +4803,8 @@ endif()
 
 endif()
 
+if(NOT gRPC_BUILD_PLUGIN_SUPPORT_ONLY)
+
 add_library(grpc++
   src/cpp/client/call_credentials.cc
   src/cpp/client/channel_cc.cc
@@ -5263,6 +5284,7 @@ if(gRPC_INSTALL)
   )
 endif()
 
+endif() # gRPC_BUILD_PLUGIN_SUPPORT_ONLY
 
 if(gRPC_BUILD_CODEGEN)
 add_library(grpc++_reflection ${_gRPC_STATIC_WIN32}
@@ -5537,6 +5559,8 @@ target_link_libraries(grpc++_test_util
 
 endif()
 
+if(NOT gRPC_BUILD_PLUGIN_SUPPORT_ONLY)
+
 add_library(grpc++_unsecure
   src/cpp/client/call_credentials.cc
   src/cpp/client/channel_cc.cc
@@ -6285,6 +6309,7 @@ if(gRPC_INSTALL)
   )
 endif()
 
+endif() # gRPC_BUILD_PLUGIN_SUPPORT_ONLY
 
 add_library(grpc_plugin_support
   src/compiler/cpp_generator.cc
@@ -6385,7 +6410,7 @@ foreach(_hdr
 endforeach()
 
 
-if(gRPC_INSTALL)
+if(gRPC_INSTALL OR gRPC_BUILD_PLUGIN_SUPPORT_ONLY)
   install(TARGETS grpc_plugin_support EXPORT gRPCTargets
     RUNTIME DESTINATION ${gRPC_INSTALL_BINDIR}
     BUNDLE DESTINATION  ${gRPC_INSTALL_BINDIR}
@@ -18827,7 +18852,7 @@ target_link_libraries(grpc_completion_queue_test
 
 
 endif()
-if(gRPC_BUILD_CODEGEN AND gRPC_BUILD_GRPC_CPP_PLUGIN)
+if(gRPC_BUILD_GRPC_CPP_PLUGIN)
 
 add_executable(grpc_cpp_plugin
   src/compiler/cpp_plugin.cc
@@ -18855,7 +18880,7 @@ target_link_libraries(grpc_cpp_plugin
 
 
 
-if(gRPC_INSTALL)
+if(gRPC_INSTALL OR gRPC_BUILD_PLUGIN_SUPPORT_ONLY)
   install(TARGETS grpc_cpp_plugin EXPORT gRPCPluginTargets
     RUNTIME DESTINATION ${gRPC_INSTALL_BINDIR}
     BUNDLE DESTINATION  ${gRPC_INSTALL_BINDIR}
@@ -51904,7 +51929,7 @@ endif()
 
 
 
-
+if (NOT gRPC_BUILD_PLUGIN_SUPPORT_ONLY)
 
 if(gRPC_INSTALL)
   install(EXPORT gRPCTargets
@@ -54105,6 +54105,8 @@
   "-laddress_sorting -lupb_textformat_lib -lupb_reflection_lib -lupb_wire_lib -lupb_message_lib -lutf8_range_lib -lupb_mini_descriptor_lib -lupb_mini_table_lib -lupb_hash_lib -lupb_mem_lib -lupb_base_lib -lupb_lex_lib"
   "grpc++_unsecure.pc")
 
+endif() # gRPC_BUILD_PLUGIN_SUPPORT_ONLY
+
 if(gRPC_BUILD_GRPCPP_OTEL_PLUGIN)
   # grpcpp_otel_plugin .pc file
   generate_pkgconfig(
-- 
2.43.0