mention that PIC is needed for libLTO and libLLVMgold

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63755 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/tools/gold/README.txt b/tools/gold/README.txt
index 6427d09c77005ce34f781d96cf3a08c06a7f1deb..92ee3d16afb4b665dbf2dacccd355217ca850787 100644 (file)
--- a/tools/gold/README.txt
+++ b/tools/gold/README.txt
@@ -13,5 +13,9 @@ there configure binutils with "../src/configure --enable-gold --enable-plugins".
 Then build binutils with "make all-gold".
 
 To build the LLVMgold plugin, configure LLVM with the option
---with-binutils-include=/path/to/binutils/src/include/ . To use the
+--with-binutils-include=/path/to/binutils/src/include/ --enable-pic. To use the
 plugin, run "ld-new --plugin /path/to/libLLVMgold.so".
+Without PIC libLTO and libLLVMgold are not being built (because they would fail
+link on x86-64 with a relocation error: PIC and non-PIC can't be combined).
+As an alternative to passing --enable-pic, you can use 'make ENABLE_PIC=1' in
+your entire LLVM build.