From aaf99371b22e816a4162391d799b9d22bba21120 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Thu, 9 Apr 2020 22:28:53 -0400
Subject: [PATCH] look for clang-cpp shared lib when it exists

See #4799
---
 cmake/Findclang.cmake | 104 +++++++++++++++++++++++++-----------------
 1 file changed, 61 insertions(+), 43 deletions(-)

diff --git a/cmake/Findclang.cmake b/cmake/Findclang.cmake
index 13f9225a34b6..28ecc5f557cd 100644
--- a/cmake/Findclang.cmake
+++ b/cmake/Findclang.cmake
@@ -8,54 +8,72 @@
 # CLANG_LIBDIRS
 
 find_path(CLANG_INCLUDE_DIRS NAMES clang/Frontend/ASTUnit.h
+  PATHS
+    /usr/lib/llvm/10/include
+    /usr/lib/llvm-10/include
+    /usr/lib/llvm-10.0/include
+    /usr/local/llvm100/include
+    /usr/local/llvm10/include
+    /mingw64/include
+)
+
+if(NOT ZIG_STATIC_LLVM)
+  find_library(CLANG_CPP_DYLIB
+    NAMES
+      clang-cpp-10.0
+      clang-cpp100
+      clang-cpp
     PATHS
-        /usr/lib/llvm/10/include
-        /usr/lib/llvm-10/include
-        /usr/lib/llvm-10.0/include
-        /usr/local/llvm100/include
-        /usr/local/llvm10/include
-        /mingw64/include)
+      ${CLANG_LIBDIRS}
+      /usr/lib/llvm-10/lib
+      /usr/local/llvm100/lib
+      /usr/local/llvm10/lib
+  )
+endif()
 
-macro(FIND_AND_ADD_CLANG_LIB _libname_)
+if(CLANG_CPP_DYLIB)
+  set(CLANG_LIBRARIES ${CLANG_CPP_DYLIB})
+else()
+  macro(FIND_AND_ADD_CLANG_LIB _libname_)
     string(TOUPPER ${_libname_} _prettylibname_)
     find_library(CLANG_${_prettylibname_}_LIB NAMES ${_libname_}
-        PATHS
-            ${CLANG_LIBDIRS}
-            /usr/lib/llvm/10/lib
-            /usr/lib/llvm-10/lib
-            /usr/lib/llvm-10.0/lib
-            /usr/local/llvm100/lib
-            /usr/local/llvm10/lib
-            /mingw64/lib
-            /c/msys64/mingw64/lib
-            c:\\msys64\\mingw64\\lib)
-    if(CLANG_${_prettylibname_}_LIB)
-        set(CLANG_LIBRARIES ${CLANG_LIBRARIES} ${CLANG_${_prettylibname_}_LIB})
-    endif()
-endmacro(FIND_AND_ADD_CLANG_LIB)
+      PATHS
+        ${CLANG_LIBDIRS}
+        /usr/lib/llvm/10/lib
+        /usr/lib/llvm-10/lib
+        /usr/lib/llvm-10.0/lib
+        /usr/local/llvm100/lib
+        /usr/local/llvm10/lib
+        /mingw64/lib
+        /c/msys64/mingw64/lib
+        c:\\msys64\\mingw64\\lib
+    )
+    set(CLANG_LIBRARIES ${CLANG_LIBRARIES} ${CLANG_${_prettylibname_}_LIB})
+  endmacro(FIND_AND_ADD_CLANG_LIB)
 
-FIND_AND_ADD_CLANG_LIB(clangFrontendTool)
-FIND_AND_ADD_CLANG_LIB(clangCodeGen)
-FIND_AND_ADD_CLANG_LIB(clangFrontend)
-FIND_AND_ADD_CLANG_LIB(clangDriver)
-FIND_AND_ADD_CLANG_LIB(clangSerialization)
-FIND_AND_ADD_CLANG_LIB(clangSema)
-FIND_AND_ADD_CLANG_LIB(clangStaticAnalyzerFrontend)
-FIND_AND_ADD_CLANG_LIB(clangStaticAnalyzerCheckers)
-FIND_AND_ADD_CLANG_LIB(clangStaticAnalyzerCore)
-FIND_AND_ADD_CLANG_LIB(clangAnalysis)
-FIND_AND_ADD_CLANG_LIB(clangASTMatchers)
-FIND_AND_ADD_CLANG_LIB(clangAST)
-FIND_AND_ADD_CLANG_LIB(clangParse)
-FIND_AND_ADD_CLANG_LIB(clangSema)
-FIND_AND_ADD_CLANG_LIB(clangBasic)
-FIND_AND_ADD_CLANG_LIB(clangEdit)
-FIND_AND_ADD_CLANG_LIB(clangLex)
-FIND_AND_ADD_CLANG_LIB(clangARCMigrate)
-FIND_AND_ADD_CLANG_LIB(clangRewriteFrontend)
-FIND_AND_ADD_CLANG_LIB(clangRewrite)
-FIND_AND_ADD_CLANG_LIB(clangCrossTU)
-FIND_AND_ADD_CLANG_LIB(clangIndex)
+  FIND_AND_ADD_CLANG_LIB(clangFrontendTool)
+  FIND_AND_ADD_CLANG_LIB(clangCodeGen)
+  FIND_AND_ADD_CLANG_LIB(clangFrontend)
+  FIND_AND_ADD_CLANG_LIB(clangDriver)
+  FIND_AND_ADD_CLANG_LIB(clangSerialization)
+  FIND_AND_ADD_CLANG_LIB(clangSema)
+  FIND_AND_ADD_CLANG_LIB(clangStaticAnalyzerFrontend)
+  FIND_AND_ADD_CLANG_LIB(clangStaticAnalyzerCheckers)
+  FIND_AND_ADD_CLANG_LIB(clangStaticAnalyzerCore)
+  FIND_AND_ADD_CLANG_LIB(clangAnalysis)
+  FIND_AND_ADD_CLANG_LIB(clangASTMatchers)
+  FIND_AND_ADD_CLANG_LIB(clangAST)
+  FIND_AND_ADD_CLANG_LIB(clangParse)
+  FIND_AND_ADD_CLANG_LIB(clangSema)
+  FIND_AND_ADD_CLANG_LIB(clangBasic)
+  FIND_AND_ADD_CLANG_LIB(clangEdit)
+  FIND_AND_ADD_CLANG_LIB(clangLex)
+  FIND_AND_ADD_CLANG_LIB(clangARCMigrate)
+  FIND_AND_ADD_CLANG_LIB(clangRewriteFrontend)
+  FIND_AND_ADD_CLANG_LIB(clangRewrite)
+  FIND_AND_ADD_CLANG_LIB(clangCrossTU)
+  FIND_AND_ADD_CLANG_LIB(clangIndex)
+endif()
 
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(clang DEFAULT_MSG CLANG_LIBRARIES CLANG_INCLUDE_DIRS)