clang: add -DLLVM_BINUTILS_INCDIR

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@24143 af4574ff-66df-0310-9fd7-8a98e5e911e0

general/prog/llvm.xml

@@ -225,6 +225,7 @@ cmake -DCMAKE_INSTALL_PREFIX=/usr               \
       -DLLVM_ENABLE_RTTI=ON                     \
       -DLLVM_TARGETS_TO_BUILD="host;AMDGPU;BPF" \
       -DLLVM_BUILD_TESTS=ON                     \
+      -DLLVM_BINUTILS_INCDIR=/usr/include       \
       -Wno-dev -G Ninja ..                      &&
 ninja</userinput></screen>
 
@@ -339,6 +340,15 @@ cp -Rv tools/clang/docs/html/* /usr/share/doc/llvm-&llvm-version;/clang-html</us
       <xref linkend="mesa"/>.
     </para>
 
+    <para>
+      <parameter>-DLLVM_BINUTILS_INCDIR=/usr/include</parameter>: Used to
+      tell the building system the location of binutils headers, installed
+      in LFS.  This allows the building of
+      <filename class="libraryfile">LLVMgold.so</filename>, which is needed
+      for building programs with <command>clang</command> and Link Time
+      Optimization (LTO).
+    </para>
+
     <para>
       <option>-DBUILD_SHARED_LIBS=ON</option>: if used instead of
       <parameter>-DLLVM_BUILD_LLVM_DYLIB=ON</parameter> and
@@ -394,7 +404,8 @@ cp -Rv tools/clang/docs/html/* /usr/share/doc/llvm-&llvm-version;/clang-html</us
           libLTO.so, 
           libRemarks.so, 
           libclang.so,
-          and libclang*.a (63 libraries)
+          libclang*.a (63 libraries),
+          and LLVMgold.so
         </seg>
         <seg>
           /usr/include/{clang,clang-c,llvm,llvm-c},