Auto merge of #37742 - mrhota:llvm_debuginfo, r=alexcrichton

Add llvm debuginfo configure option

CC @nnethercote @Mark-Simulacrum

We add a new configure option, `--enable-llvm-debuginfo`, to do exactly what you'd think.

Re: #31033

Fixes #37738

Author: bors

configure

@@ -642,6 +642,7 @@ opt_nosave optimize-cxx 1 "build optimized C++ code"
 opt_nosave optimize-llvm 1 "build optimized LLVM"
 opt_nosave llvm-assertions 0 "build LLVM with assertions"
 opt_nosave debug-assertions 0 "build with debugging assertions"
+opt_nosave llvm-release-debuginfo 0 "build LLVM with debugger metadata"
 opt_nosave debuginfo 0 "build with debugger metadata"
 opt_nosave debuginfo-lines 0 "build with line number debugger metadata"
 opt_nosave debug-jemalloc 0 "build jemalloc with --enable-debug --enable-fill"
@@ -778,6 +779,7 @@ if [ -n "$CFG_DISABLE_OPTIMIZE_CXX" ]; then putvar CFG_DISABLE_OPTIMIZE_CXX; fi
 if [ -n "$CFG_DISABLE_OPTIMIZE_LLVM" ]; then putvar CFG_DISABLE_OPTIMIZE_LLVM; fi
 if [ -n "$CFG_ENABLE_LLVM_ASSERTIONS" ]; then putvar CFG_ENABLE_LLVM_ASSERTIONS; fi
 if [ -n "$CFG_ENABLE_DEBUG_ASSERTIONS" ]; then putvar CFG_ENABLE_DEBUG_ASSERTIONS; fi
+if [ -n "$CFG_ENABLE_LLVM_RELEASE_DEBUGINFO" ]; then putvar CFG_ENABLE_LLVM_RELEASE_DEBUGINFO; fi
 if [ -n "$CFG_ENABLE_DEBUGINFO" ]; then putvar CFG_ENABLE_DEBUGINFO; fi
 if [ -n "$CFG_ENABLE_DEBUGINFO_LINES" ]; then putvar CFG_ENABLE_DEBUGINFO_LINES; fi
 if [ -n "$CFG_ENABLE_DEBUG_JEMALLOC" ]; then putvar CFG_ENABLE_DEBUG_JEMALLOC; fi
@@ -1772,6 +1774,8 @@ do
 
     if [ -n "$CFG_DISABLE_OPTIMIZE_LLVM" ]; then
         CMAKE_ARGS="$CMAKE_ARGS -DCMAKE_BUILD_TYPE=Debug"
+    elif [ -n "$CFG_ENABLE_LLVM_RELEASE_DEBUGINFO" ]; then
+        CMAKE_ARGS="$CMAKE_ARGS -DCMAKE_BUILD_TYPE=RelWithDebInfo"
     else
         CMAKE_ARGS="$CMAKE_ARGS -DCMAKE_BUILD_TYPE=Release"
     fi

mk/llvm.mk

@@ -21,6 +21,8 @@ endif
 
 ifdef CFG_DISABLE_OPTIMIZE_LLVM
 LLVM_BUILD_CONFIG_MODE := Debug
+else ifdef CFG_ENABLE_LLVM_RELEASE_DEBUGINFO
+LLVM_BUILD_CONFIG_MODE := RelWithDebInfo
 else
 LLVM_BUILD_CONFIG_MODE := Release
 endif

src/bootstrap/config.rs

@@ -339,6 +339,7 @@ impl Config {
                 ("COMPILER_DOCS", self.compiler_docs),
                 ("DOCS", self.docs),
                 ("LLVM_ASSERTIONS", self.llvm_assertions),
+                ("LLVM_RELEASE_DEBUGINFO", self.llvm_release_debuginfo),
                 ("OPTIMIZE_LLVM", self.llvm_optimize),
                 ("LLVM_VERSION_CHECK", self.llvm_version_check),
                 ("LLVM_STATIC_STDCPP", self.llvm_static_stdcpp),