[PATCH] [clang] cmake: resolve symlinks in ClangConfig.cmake

Ensure that symlinks such as /usr/lib/cmake/clang-X.Y (pointing to
/usr/lib/llvm-X.Y/lib/cmake/llvm) are resolved. This ensures that
CLANG_INSTALL_PREFIX ends up to be /usr/lib/llvm-X.Y instead of /usr.

Partially addresses PR37128

Gbp-Pq: Name 0001-tools-clang-cmake-resolve-symlinks-in-ClangConfig.cmake.patch

diff --git a/clang/cmake/modules/CMakeLists.txt b/clang/cmake/modules/CMakeLists.txt
index be6d1d7257bc106ca3fd3abe653710b1081cf7a4..bcb61f6cc8f958c0a07f65ae40190ea264ccf98d 100644 (file)
--- a/clang/cmake/modules/CMakeLists.txt
+++ b/clang/cmake/modules/CMakeLists.txt
@@ -30,10 +30,10 @@ set(CLANG_CONFIG_EXPORTS_FILE)
 # Generate ClangConfig.cmake for the install tree.
 set(CLANG_CONFIG_CODE "
 # Compute the installation prefix from this LLVMConfig.cmake file location.
-get_filename_component(CLANG_INSTALL_PREFIX \"\${CMAKE_CURRENT_LIST_FILE}\" PATH)")
+get_filename_component(CLANG_INSTALL_PREFIX \"\${CMAKE_CURRENT_LIST_FILE}\" REALPATH)")
 # Construct the proper number of get_filename_component(... PATH)
 # calls to compute the installation prefix.
-string(REGEX REPLACE "/" ";" _count "${CLANG_INSTALL_PACKAGE_DIR}")
+string(REGEX REPLACE "/" ";" _count "prefix/${CLANG_INSTALL_PACKAGE_DIR}")
 foreach(p ${_count})
   set(CLANG_CONFIG_CODE "${CLANG_CONFIG_CODE}
 get_filename_component(CLANG_INSTALL_PREFIX \"\${CLANG_INSTALL_PREFIX}\" PATH)")