Add --build-id=fast as a synonym for --build-id.

When you omit an argument, most options fall back to their defaults.
For example, --color-diagnostics is a synonym for --color-diagnostics=auto.
We don't have a way to specify the default choice for --build-id, so we
can't describe --build-id (without an argument) in that way.
This patch adds "fast" for the default build-id choice.

Differential Revision: https://reviews.llvm.org/D43032

llvm-svn: 324502

diff --git a/lld/ELF/Driver.cpp b/lld/ELF/Driver.cpp
index 92fcb5eb7d0d99757f560ad8830ecebbddcb6d48..b543bb16a9ac69c83c5b7b29d484d718d61f77d3 100644 (file)
--- a/lld/ELF/Driver.cpp
+++ b/lld/ELF/Driver.cpp
@@ -554,6 +554,8 @@ getBuildId(opt::InputArgList &Args) {
     return {BuildIdKind::Fast, {}};
 
   StringRef S = Arg->getValue();
+  if (S == "fast")
+    return {BuildIdKind::Fast, {}};
   if (S == "md5")
     return {BuildIdKind::Md5, {}};
   if (S == "sha1" || S == "tree")

diff --git a/lld/test/ELF/build-id.s b/lld/test/ELF/build-id.s
index 9447a14d4e8a76f8d6de3c74ac50359f711ea344..5ff2996dc8ea952762afb669c90f637e2907e875 100644 (file)
--- a/lld/test/ELF/build-id.s
+++ b/lld/test/ELF/build-id.s
@@ -7,6 +7,8 @@
 
 # RUN: ld.lld --build-id %t -o %t2 -threads
 # RUN: llvm-objdump -s %t2 | FileCheck -check-prefix=DEFAULT %s
+# RUN: ld.lld --build-id=fast %t -o %t2 -threads
+# RUN: llvm-objdump -s %t2 | FileCheck -check-prefix=DEFAULT %s
 # RUN: ld.lld --build-id %t -o %t2 -no-threads
 # RUN: llvm-objdump -s %t2 | FileCheck -check-prefix=DEFAULT %s