#!/usr/bin/env bash

# Fix Broken cmake files for llvm-3.5-dev

# See : https://bugs.launchpad.net/ubuntu/+source/llvm/+bug/1387011

target='/usr/share/llvm-3.5/cmake/LLVMConfig.cmake'

sudo patch --backup $target <<HEREDOC
--- original
+++ repaired
@@ -43,7 +43,7 @@
 set(LLVM_INCLUDE_DIRS "/usr/lib/llvm-3.5/include")
 set(LLVM_LIBRARY_DIRS "/usr/lib/llvm-3.5/lib")
 set(LLVM_DEFINITIONS "-D__STDC_LIMIT_MACROS" "-D__STDC_CONSTANT_MACROS")
-set(LLVM_CMAKE_DIR "/usr/lib/llvm-3.5/share/llvm/cmake")
+set(LLVM_CMAKE_DIR "/usr/share/llvm-3.5/cmake")
 set(LLVM_TOOLS_BINARY_DIR "/usr/lib/llvm-3.5/bin")
 
 if(NOT TARGET LLVMSupport)
HEREDOC

# Update LLVMExports by creating the targets and giving their
# locations.

target_cmake=/usr/share/llvm-3.5/cmake/LLVMExports.cmake
backup_cmake=$target_cmake.bak

if [ ! -f $backup_cmake ]
then
   sudo cp $target_cmake $backup_cmake
fi

tmp=$(mktemp)

libdir=$(llvm-config --libdir)

for file in $(llvm-config --libnames)
do
   target=$(echo $file | sed 's/lib\(.*\)\.a/\1/')

   echo "add_library($target STATIC IMPORTED)" \
        >> $tmp
   echo "set_property(TARGET $target PROPERTY IMPORTED_LOCATION "\
        "\"$libdir/lib$target.a\")"\
        >> $tmp
done

cat $target_cmake >> $tmp

sudo mv $tmp $target_cmake

sudo chown --reference=$backup_cmake $target_cmake
sudo chmod --reference=$backup_cmake $target_cmake