This patch causes the --enable-debug-runtime configure flag and the
DEBUG_RUNTIME Makefile variable to pass -g to gcc when building LLVM's objects.
Without this, it's very hard to debug crashes that happen in Release-Asserts
mode but not Debug mode.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82775 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile.rules b/Makefile.rules
index 6cc4bd3..48cb690 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -313,6 +313,13 @@
CXX.Flags += $(OPTIMIZE_OPTION) $(OmitFramePointer)
C.Flags += $(OPTIMIZE_OPTION) $(OmitFramePointer)
LD.Flags += $(OPTIMIZE_OPTION)
+ ifdef DEBUG_RUNTIME
+ BuildMode := $(BuildMode)+Debug
+ CXX.Flags += -g
+ C.Flags += -g
+ LD.Flags += -g
+ KEEP_SYMBOLS := 1
+ endif
else
BuildMode := Debug
CXX.Flags += -g
diff --git a/docs/MakefileGuide.html b/docs/MakefileGuide.html
index f996144..8e55248 100644
--- a/docs/MakefileGuide.html
+++ b/docs/MakefileGuide.html
@@ -626,6 +626,11 @@
<dd>If set to any value, causes a bitcode library (.bc) to be built.</dd>
<dt><a name="CONFIG_FILES"><tt>CONFIG_FILES</tt></a></dt>
<dd>Specifies a set of configuration files to be installed.</dd>
+ <dt><a name="DEBUG_RUNTIME"><tt>DEBUG_RUNTIME</tt></a></dt>
+ <dd>If set to any value, causes the build to include debugging
+ symbols even in optimized objects, libraries and executables. This
+ alters the flags specified to the compilers and linkers. Debugging
+ isn't fun in an optimized build, but it is possible.</dd>
<dt><a name="DIRS"><tt>DIRS</tt></a></dt>
<dd>Specifies a set of directories, usually children of the current
directory, that should also be made using the same goal. These directories