Use absl pkg-config instead of linking them directly (#25840)

CMakeLists.txt

@@ -15518,8 +15518,8 @@ generate_pkgconfig(
   "gpr"
   "gRPC platform support library"
   "${gRPC_CORE_VERSION}"
-  ""
-  "-lgpr -labsl_synchronization -labsl_time -labsl_time_zone -labsl_civil_time -labsl_graphcycles_internal -labsl_status -labsl_cord -labsl_str_format_internal -labsl_bad_optional_access -labsl_cord -labsl_symbolize -labsl_strings -labsl_strings_internal -labsl_int128 -labsl_demangle_internal -labsl_malloc_internal -labsl_stacktrace -labsl_debugging_internal -labsl_throw_delegate -labsl_base -labsl_spinlock_wait -labsl_raw_logging_internal -labsl_log_severity"
+  "absl_base absl_memory absl_optional absl_status absl_str_format absl_strings absl_synchronization absl_time"
+  "-lgpr"
   ""
   "gpr.pc")
 
@@ -15528,8 +15528,8 @@ generate_pkgconfig(
   "gRPC"
   "high performance general RPC framework"
   "${gRPC_CORE_VERSION}"
-  "gpr openssl"
-  "-lgrpc -laddress_sorting -lre2 -lupb -lcares -lz -labsl_statusor -labsl_status -labsl_raw_hash_set -labsl_hashtablez_sampler -labsl_synchronization -labsl_time -labsl_time_zone -labsl_civil_time -labsl_graphcycles_internal -labsl_symbolize -labsl_demangle_internal -labsl_malloc_internal -labsl_stacktrace -labsl_debugging_internal -labsl_exponential_biased -labsl_cord -labsl_str_format_internal -labsl_cord -labsl_hash -labsl_bad_variant_access -labsl_bad_optional_access -labsl_strings -labsl_strings_internal -labsl_wyhash -labsl_int128 -labsl_city -labsl_throw_delegate -labsl_base -labsl_spinlock_wait -labsl_raw_logging_internal -labsl_log_severity"
+  "gpr openssl absl_base absl_bind_front absl_flat_hash_map absl_inlined_vector absl_memory absl_optional absl_status absl_statusor absl_str_format absl_strings absl_synchronization absl_time"
+  "-lgrpc -laddress_sorting -lre2 -lupb -lcares -lz"
   ""
   "grpc.pc")
 
@@ -15538,8 +15538,8 @@ generate_pkgconfig(
   "gRPC unsecure"
   "high performance general RPC framework without SSL"
   "${gRPC_CORE_VERSION}"
-  "gpr"
-  "-lgrpc_unsecure -labsl_statusor -labsl_status -labsl_raw_hash_set -labsl_hashtablez_sampler -labsl_synchronization -labsl_time -labsl_time_zone -labsl_civil_time -labsl_graphcycles_internal -labsl_symbolize -labsl_demangle_internal -labsl_malloc_internal -labsl_stacktrace -labsl_debugging_internal -labsl_exponential_biased -labsl_cord -labsl_str_format_internal -labsl_cord -labsl_hash -labsl_bad_variant_access -labsl_bad_optional_access -labsl_strings -labsl_strings_internal -labsl_wyhash -labsl_int128 -labsl_city -labsl_throw_delegate -labsl_base -labsl_spinlock_wait -labsl_raw_logging_internal -labsl_log_severity"
+  "gpr absl_base absl_flat_hash_map absl_inlined_vector absl_memory absl_optional absl_status absl_statusor absl_str_format absl_strings absl_synchronization absl_time"
+  "-lgrpc_unsecure"
   ""
   "grpc_unsecure.pc")
 
@@ -15548,8 +15548,8 @@ generate_pkgconfig(
   "gRPC++"
   "C++ wrapper for gRPC"
   "${gRPC_CPP_VERSION}"
-  "grpc"
-  "-lgrpc++ -labsl_statusor -labsl_status -labsl_raw_hash_set -labsl_hashtablez_sampler -labsl_synchronization -labsl_time -labsl_time_zone -labsl_civil_time -labsl_graphcycles_internal -labsl_symbolize -labsl_demangle_internal -labsl_malloc_internal -labsl_stacktrace -labsl_debugging_internal -labsl_exponential_biased -labsl_cord -labsl_str_format_internal -labsl_cord -labsl_hash -labsl_bad_variant_access -labsl_bad_optional_access -labsl_strings -labsl_strings_internal -labsl_wyhash -labsl_int128 -labsl_city -labsl_throw_delegate -labsl_base -labsl_spinlock_wait -labsl_raw_logging_internal -labsl_log_severity"
+  "grpc absl_base absl_bind_front absl_flat_hash_map absl_inlined_vector absl_memory absl_optional absl_status absl_statusor absl_str_format absl_strings absl_synchronization absl_time"
+  "-lgrpc++"
   ""
   "grpc++.pc")
 
@@ -15558,7 +15558,7 @@ generate_pkgconfig(
   "gRPC++ unsecure"
   "C++ wrapper for gRPC without SSL"
   "${gRPC_CPP_VERSION}"
-  "grpc_unsecure"
-  "-lgrpc++_unsecure -labsl_statusor -labsl_status -labsl_raw_hash_set -labsl_hashtablez_sampler -labsl_synchronization -labsl_time -labsl_time_zone -labsl_civil_time -labsl_graphcycles_internal -labsl_symbolize -labsl_demangle_internal -labsl_malloc_internal -labsl_stacktrace -labsl_debugging_internal -labsl_exponential_biased -labsl_cord -labsl_str_format_internal -labsl_cord -labsl_hash -labsl_bad_variant_access -labsl_bad_optional_access -labsl_strings -labsl_strings_internal -labsl_wyhash -labsl_int128 -labsl_city -labsl_throw_delegate -labsl_base -labsl_spinlock_wait -labsl_raw_logging_internal -labsl_log_severity"
+  "grpc_unsecure absl_base absl_flat_hash_map absl_inlined_vector absl_memory absl_optional absl_status absl_statusor absl_str_format absl_strings absl_synchronization absl_time"
+  "-lgrpc++_unsecure"
   ""
   "grpc++_unsecure.pc")

templates/CMakeLists.txt.template

@@ -39,13 +39,20 @@
   def get_absl_dep(lib_name):
       return lib_map[lib_name].cmake_target
 
-  def list_absl_lib_files_for(lib_name):
-    ret = []
-    lib = lib_map[lib_name]
-    for dep in lib.transitive_deps:
-      if is_absl_lib(dep) and len(lib_map[dep].src) > 0:
-        ret.append(get_absl_dep(dep).replace("::", "_"))
-    return ret
+  def lib_and_transitive_deps(lib):
+    return list(sorted(set({lib} | set(lib_map[lib].transitive_deps))))
+
+  def list_abseil_pkg_targets(lib):
+    # This returns a list of abseil pkg targets which the given lib and
+    # its non-abseil transitive dependencies depend on.
+    # As a result, internal abseil libraries are excluded from the result.
+    absl_specs = set()
+    for lib_name in lib_and_transitive_deps(lib):
+      if is_absl_lib(lib_name): continue
+      for dep in lib_map[lib_name].deps:
+        if is_absl_lib(dep):
+          absl_specs.add(get_absl_dep(dep).replace("::", "_"))
+    return list(sorted(absl_specs))
 
   def is_shared_only_lib(lib_name):
     """Returns True if only shared library should be generated."""
@@ -53,7 +60,6 @@
     # only makes sense as a shared lib.
     return lib_name in ['grpc_csharp_ext']
 
-
   def get_deps(target_dict):
     deps = []
     if target_dict.get('baselib', False) or target_dict['name'] == 'address_sorting':
@@ -739,8 +745,8 @@
     "gpr"
     "gRPC platform support library"
     "<%text>${gRPC_CORE_VERSION}</%text>"
-    ""
-    "${" ".join(("-l" + l) for l in ["gpr",] + list_absl_lib_files_for("gpr"))}"
+    "${" ".join(list_abseil_pkg_targets("gpr"))}"
+    "${" ".join(("-l" + l) for l in ["gpr"])}"
     ""
     "gpr.pc")
 
@@ -749,8 +755,8 @@
     "gRPC"
     "high performance general RPC framework"
     "<%text>${gRPC_CORE_VERSION}</%text>"
-    "gpr openssl"
-    "${" ".join(("-l" + l) for l in ["grpc", "address_sorting", "re2", "upb", "cares", "z"] + list_absl_lib_files_for("grpc"))}"
+    "${" ".join(["gpr", "openssl"] + list_abseil_pkg_targets("grpc"))}"
+    "${" ".join(("-l" + l) for l in ["grpc", "address_sorting", "re2", "upb", "cares", "z"])}"
     ""
     "grpc.pc")
 
@@ -759,8 +765,8 @@
     "gRPC unsecure"
     "high performance general RPC framework without SSL"
     "<%text>${gRPC_CORE_VERSION}</%text>"
-    "gpr"
-    "${" ".join(("-l" + l) for l in ["grpc_unsecure",] + list_absl_lib_files_for("grpc_unsecure"))}"
+    "${" ".join(["gpr"] + list_abseil_pkg_targets("grpc_unsecure"))}"
+    "${" ".join(("-l" + l) for l in ["grpc_unsecure"])}"
     ""
     "grpc_unsecure.pc")
 
@@ -769,8 +775,8 @@
     "gRPC++"
     "C++ wrapper for gRPC"
     "<%text>${gRPC_CPP_VERSION}</%text>"
-    "grpc"
-    "${" ".join(("-l" + l) for l in ["grpc++",] + list_absl_lib_files_for("grpc++"))}"
+    "${" ".join(["grpc"] + list_abseil_pkg_targets("grpc++"))}"
+    "${" ".join(("-l" + l) for l in ["grpc++"])}"
     ""
     "grpc++.pc")
 
@@ -779,7 +785,7 @@
     "gRPC++ unsecure"
     "C++ wrapper for gRPC without SSL"
     "<%text>${gRPC_CPP_VERSION}</%text>"
-    "grpc_unsecure"
-    "${" ".join(("-l" + l) for l in ["grpc++_unsecure",] + list_absl_lib_files_for("grpc++_unsecure"))}"
+    "${" ".join(["grpc_unsecure"] + list_abseil_pkg_targets("grpc++_unsecure"))}"
+    "${" ".join(("-l" + l) for l in ["grpc++_unsecure"])}"
     ""
     "grpc++_unsecure.pc")