[CMake] Move check for dlfcn.h and dladdr to clang (#76163)
This patch checks for the presence of dlfcn.h and dladdr in clang to be used in clang/tools/libclang/CIndexer.cpp
diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
index 2ca6db0..9f81447 100644
--- a/clang/CMakeLists.txt
+++ b/clang/CMakeLists.txt
@@ -167,6 +167,23 @@
include(CheckIncludeFile)
check_include_file(sys/resource.h CLANG_HAVE_RLIMITS)
+# This check requires _GNU_SOURCE on linux
+check_include_file(dlfcn.h CLANG_HAVE_DLFCN_H)
+if( CLANG_HAVE_DLFCN_H )
+ include(CheckLibraryExists)
+ include(CheckSymbolExists)
+ check_library_exists(dl dlopen "" HAVE_LIBDL)
+ if( HAVE_LIBDL )
+ list(APPEND CMAKE_REQUIRED_LIBRARIES dl)
+ endif()
+ list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
+ check_symbol_exists(dladdr dlfcn.h CLANG_HAVE_DLADDR)
+ list(REMOVE_ITEM CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
+ if( HAVE_LIBDL )
+ list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES dl)
+ endif()
+endif()
+
set(CLANG_RESOURCE_DIR "" CACHE STRING
"Relative directory from the Clang binary to its resource files.")
