[llvm] r184808 - Add an autoconf option for turning on -gsplit-dwarf by default
Eric Christopher
echristo at gmail.com
Mon Jun 24 18:12:25 PDT 2013
Author: echristo
Date: Mon Jun 24 20:12:25 2013
New Revision: 184808
URL: http://llvm.org/viewvc/llvm-project?rev=184808&view=rev
Log:
Add an autoconf option for turning on -gsplit-dwarf by default
when building llvm. This saves quite a bit of time and space when
linking. Please report any problems via bugzilla.
Caveats:
a) This will only work on linux
b) This requires a fairly new binutils
c) This requires a fairly new gdb
Modified:
llvm/trunk/Makefile.config.in
llvm/trunk/Makefile.rules
llvm/trunk/autoconf/configure.ac
llvm/trunk/configure
Modified: llvm/trunk/Makefile.config.in
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/Makefile.config.in?rev=184808&r1=184807&r2=184808&view=diff
==============================================================================
--- llvm/trunk/Makefile.config.in (original)
+++ llvm/trunk/Makefile.config.in Mon Jun 24 20:12:25 2013
@@ -235,6 +235,9 @@ ENABLE_LIBCPP = @ENABLE_LIBCPP@
# When ENABLE_CXX11 is enabled, LLVM uses c++11 mode by default to build.
ENABLE_CXX11 = @ENABLE_CXX11@
+# When ENABLE_SPLIT_DWARF is enabled, LLVM uses -gfission to build in debug mode.
+ENABLE_SPLIT_DWARF = @ENABLE_SPLIT_DWARF@
+
# When ENABLE_CLANG_ARCMT is enabled, clang will have ARCMigrationTool.
ENABLE_CLANG_ARCMT = @ENABLE_CLANG_ARCMT@
Modified: llvm/trunk/Makefile.rules
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/Makefile.rules?rev=184808&r1=184807&r2=184808&view=diff
==============================================================================
--- llvm/trunk/Makefile.rules (original)
+++ llvm/trunk/Makefile.rules Mon Jun 24 20:12:25 2013
@@ -297,8 +297,13 @@ else
KEEP_SYMBOLS := 1
else
BuildMode := Debug
+ ifeq ($(ENABLE_SPLIT_DWARF), 1)
+ CXX.Flags += -gsplit-dwarf
+ C.Flags += -gsplit-dwarf
+ else
CXX.Flags += -g
C.Flags += -g
+ endif
KEEP_SYMBOLS := 1
endif
endif
Modified: llvm/trunk/autoconf/configure.ac
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/autoconf/configure.ac?rev=184808&r1=184807&r2=184808&view=diff
==============================================================================
--- llvm/trunk/autoconf/configure.ac (original)
+++ llvm/trunk/autoconf/configure.ac Mon Jun 24 20:12:25 2013
@@ -510,6 +510,19 @@ case "$enableval" in
*) AC_MSG_ERROR([Invalid setting for --enable-cxx11. Use "yes" or "no"]) ;;
esac
+dnl --enable-fission : check whether or not to use -gsplit-dwarf on the command
+dnl line
+AC_ARG_ENABLE(split-dwarf,
+ AS_HELP_STRING([--enable-split-dwarf],
+ [Use split-dwarf if available (default is NO)]),,
+ enableval=default)
+case "$enableval" in
+ yes) AC_SUBST(ENABLE_SPLIT_DWARF,[1]) ;;
+ no) AC_SUBST(ENABLE_SPLIT_DWARF,[0]) ;;
+ default) AC_SUBST(ENABLE_SPLIT_DWARF,[0]);;
+ *) AC_MSG_ERROR([Invalid setting for --enable-split-dwarf. Use "yes" or "no"]) ;;
+esac
+
dnl --enable-clang-arcmt: check whether to enable clang arcmt
clang_arcmt="yes"
AC_ARG_ENABLE(clang-arcmt,
Modified: llvm/trunk/configure
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/configure?rev=184808&r1=184807&r2=184808&view=diff
==============================================================================
--- llvm/trunk/configure (original)
+++ llvm/trunk/configure Mon Jun 24 20:12:25 2013
@@ -685,6 +685,7 @@ BUILD_CXX
CVSBUILD
ENABLE_LIBCPP
ENABLE_CXX11
+ENABLE_SPLIT_DWARF
ENABLE_CLANG_ARCMT
ENABLE_CLANG_STATIC_ANALYZER
ENABLE_CLANG_REWRITER
@@ -1406,6 +1407,7 @@ Optional Features:
--enable-polly Use polly if available (default is YES)
--enable-libcpp Use libc++ if available (default is NO)
--enable-cxx11 Use c++11 if available (default is NO)
+ --enable-split-dwarf Use split-dwarf if available (default is NO)
--enable-clang-arcmt Enable building of clang ARCMT (default is YES)
--enable-clang-static-analyzer
Enable building of clang Static Analyzer (default is
@@ -5165,6 +5167,25 @@ echo "$as_me: error: Invalid setting for
{ (exit 1); exit 1; }; } ;;
esac
+# Check whether --enable-split-dwarf was given.
+if test "${enable_split_dwarf+set}" = set; then
+ enableval=$enable_split_dwarf;
+else
+ enableval=default
+fi
+
+case "$enableval" in
+ yes) ENABLE_SPLIT_DWARF=1
+ ;;
+ no) ENABLE_SPLIT_DWARF=0
+ ;;
+ default) ENABLE_SPLIT_DWARF=0
+;;
+ *) { { echo "$as_me:$LINENO: error: Invalid setting for --enable-split-dwarf. Use \"yes\" or \"no\"" >&5
+echo "$as_me: error: Invalid setting for --enable-split-dwarf. Use \"yes\" or \"no\"" >&2;}
+ { (exit 1); exit 1; }; } ;;
+esac
+
clang_arcmt="yes"
# Check whether --enable-clang-arcmt was given.
if test "${enable_clang_arcmt+set}" = set; then
@@ -10518,7 +10539,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<EOF
-#line 10521 "configure"
+#line 10542 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -23349,6 +23370,7 @@ BUILD_CXX!$BUILD_CXX$ac_delim
CVSBUILD!$CVSBUILD$ac_delim
ENABLE_LIBCPP!$ENABLE_LIBCPP$ac_delim
ENABLE_CXX11!$ENABLE_CXX11$ac_delim
+ENABLE_SPLIT_DWARF!$ENABLE_SPLIT_DWARF$ac_delim
ENABLE_CLANG_ARCMT!$ENABLE_CLANG_ARCMT$ac_delim
ENABLE_CLANG_STATIC_ANALYZER!$ENABLE_CLANG_STATIC_ANALYZER$ac_delim
ENABLE_CLANG_REWRITER!$ENABLE_CLANG_REWRITER$ac_delim
@@ -23362,7 +23384,6 @@ DEBUG_RUNTIME!$DEBUG_RUNTIME$ac_delim
DEBUG_SYMBOLS!$DEBUG_SYMBOLS$ac_delim
KEEP_SYMBOLS!$KEEP_SYMBOLS$ac_delim
JIT!$JIT$ac_delim
-TARGET_HAS_JIT!$TARGET_HAS_JIT$ac_delim
_ACEOF
if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 97; then
@@ -23404,6 +23425,7 @@ _ACEOF
ac_delim='%!_!# '
for ac_last_try in false false false false false :; do
cat >conf$$subs.sed <<_ACEOF
+TARGET_HAS_JIT!$TARGET_HAS_JIT$ac_delim
ENABLE_DOCS!$ENABLE_DOCS$ac_delim
ENABLE_DOXYGEN!$ENABLE_DOXYGEN$ac_delim
LLVM_ENABLE_THREADS!$LLVM_ENABLE_THREADS$ac_delim
@@ -23500,7 +23522,6 @@ LLVM_MANDIR!$LLVM_MANDIR$ac_delim
LLVM_CONFIGTIME!$LLVM_CONFIGTIME$ac_delim
BINDINGS_TO_BUILD!$BINDINGS_TO_BUILD$ac_delim
ALL_BINDINGS!$ALL_BINDINGS$ac_delim
-OCAML_LIBDIR!$OCAML_LIBDIR$ac_delim
_ACEOF
if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 97; then
@@ -23542,6 +23563,7 @@ _ACEOF
ac_delim='%!_!# '
for ac_last_try in false false false false false :; do
cat >conf$$subs.sed <<_ACEOF
+OCAML_LIBDIR!$OCAML_LIBDIR$ac_delim
ENABLE_VISIBILITY_INLINES_HIDDEN!$ENABLE_VISIBILITY_INLINES_HIDDEN$ac_delim
RPATH!$RPATH$ac_delim
RDYNAMIC!$RDYNAMIC$ac_delim
@@ -23550,7 +23572,7 @@ LIBOBJS!$LIBOBJS$ac_delim
LTLIBOBJS!$LTLIBOBJS$ac_delim
_ACEOF
- if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 6; then
+ if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 7; then
break
elif $ac_last_try; then
{ { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
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