Use new upstream PR#25635 as .pc path fix

29826.patch

@@ -0,0 +1,50 @@
+From 4138f4bc0347e090431d2476610cbbcaf1397f41 Mon Sep 17 00:00:00 2001
+From: "Benjamin A. Beasley" <code@musicinmybrain.net>
+Date: Fri, 27 May 2022 14:41:08 -0400
+Subject: [PATCH 1/2] Use gRPC_INSTALL_LIBDIR for pkgconfig files
+
+Fixes #25635.
+
+If grpc libraries are installed in <prefix>/lib64, then .pc files should
+be installed in <prefix>/lib64/pkgconfig. Before this commit, they were
+always installed in <prefix>/lib/pkgconfig.
+---
+ templates/CMakeLists.txt.template | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/templates/CMakeLists.txt.template b/templates/CMakeLists.txt.template
+index 9096d9125965..ee3e1782533b 100644
+--- a/templates/CMakeLists.txt.template
++++ b/templates/CMakeLists.txt.template
+@@ -850,7 +850,7 @@
+       "<%text>${output_filepath}</%text>"
+       @ONLY)
+     install(FILES "<%text>${output_filepath}</%text>"
+-      DESTINATION "lib/pkgconfig/")
++      DESTINATION "<%text>${gRPC_INSTALL_LIBDIR}/pkgconfig</%text>")
+   endfunction()
+ 
+   # gpr .pc file
+
+From 07a8e936c86b3852ebd14f6fccba53fdffb07a63 Mon Sep 17 00:00:00 2001
+From: "Benjamin A. Beasley" <code@musicinmybrain.net>
+Date: Fri, 27 May 2022 14:45:52 -0400
+Subject: [PATCH 2/2] Re-generate projects
+
+---
+ CMakeLists.txt | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index e7aa97e9fcff..76c9ef0eede9 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -19820,7 +19820,7 @@ function(generate_pkgconfig name description version requires
+     "${output_filepath}"
+     @ONLY)
+   install(FILES "${output_filepath}"
+-    DESTINATION "lib/pkgconfig/")
++    DESTINATION "${gRPC_INSTALL_LIBDIR}/pkgconfig")
+ endfunction()
+ 
+ # gpr .pc file

grpc.spec

@@ -307,6 +307,14 @@ Patch:          %{forgeurl}/pull/29359.patch
 # “Segfault in client_lb_end2end_test due to absl::string_view(nullptr)”
 # https://github.com/grpc/grpc/issues/29567
 Patch:          %{forgeurl}/pull/29568.patch
+# Use gRPC_INSTALL_LIBDIR for pkgconfig files
+# https://github.com/grpc/grpc/pull/29826
+#
+# Fixes:
+#
+# Should install pkgconfig files under gRPC_INSTALL_LIBDIR
+# https://github.com/grpc/grpc/issues/25635
+Patch:          %{forgeurl}/pull/29826.patch
 
 Requires:       grpc-data = %{version}-%{release}
 
@@ -757,11 +765,6 @@ sed -r -i 's/(std=c\+\+)11/\1%{cpp_std}/g' \
     tools/run_tests/artifacts/artifact_targets.py \
     tools/distrib/python/grpcio_tools/setup.py
 
-echo '===== Fixing .pc install path =====' 2>&1
-# Fix the install path for .pc files
-# https://github.com/grpc/grpc/issues/25635
-sed -r -i 's|lib(/pkgconfig)|\${gRPC_INSTALL_LIBDIR}\1|' CMakeLists.txt
-
 
 %build
 # ~~~~ C (core) and C++ (cpp) ~~~~