Disable libbacktrace by default

It's currently only tested on linux, and doesn't work yet on macOS (tested on 10.15). Further work is necessary

Signed-off-by: Haru <haru@dotalux.com>

1 files changed, 214 insertions, 169 deletions

diff --git a/configure.ac b/configure.ac
index e85e4463a..e13fc4b6c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -319,7 +319,7 @@ AC_ARG_ENABLE(
 	AC_HELP_STRING(
 		[--enable-libbacktrace@<:@=ARG@:>@],
 		[
-			Compiles with libbacktrace. (yes by default)
+			Compiles with libbacktrace. (no by default - experimental)
 		]
 	),
 	[
@@ -330,7 +330,7 @@ AC_ARG_ENABLE(
 			*) AC_MSG_ERROR([[invalid argument --enable-libbacktrace=$enableval... stopping]]);;
 		esac
 	],
-	[enable_libbacktrace="yes"]
+	[enable_libbacktrace="no"]
 )
 
 #
@@ -1415,188 +1415,233 @@ esac
 #
 # libbacktrace
 #
-case $enable_libbacktrace in
-	"no")
-		# default value
-		USE_LIBBACKTRACE="no"
-		;;
-	"yes")
-		CFLAGS="$CFLAGS "
-		CPPFLAGS="$CPPFLAGS -DHAVE_LIBBACKTRACE"
-		USE_LIBBACKTRACE="yes"
-		AC_CHECK_FLAG(-funwind-tables)
-		;;
-esac
+if test "$enable_libbacktrace" = "no" ; then
+	USE_LIBBACKTRACE="no"
+else
+	CPPFLAGS="$CPPFLAGS -DHAVE_LIBBACKTRACE"
+	USE_LIBBACKTRACE="yes"
+
+	# libbacktrace checks
+	AC_CHECK_FLAG(-funwind-tables)
+
+	AC_PROG_AWK
+	case "$AWK" in
+		"")
+			AC_MSG_ERROR([Libbacktrace requires awk to build])
+			;;
+	esac
+
+	backtrace_supported=yes
+	AC_CHECK_HEADER([unwind.h],
+		[AC_CHECK_FUNC([_Unwind_Backtrace],
+				[BACKTRACE_FILE="backtrace.lo simple.lo"],
+				[
+					BACKTRACE_FILE="nounwind.lo"
+					backtrace_supported=no
+				]
+		)],
+		[
+			BACKTRACE_FILE="nounwind.lo"
+		 	backtrace_supported=no
+		]
+	)
+	AC_SUBST(BACKTRACE_FILE)
 
-# libbacktrace checks
+	AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.])
 
-AC_PROG_AWK
-case "$AWK" in
-"") AC_MSG_ERROR([can't build without awk]) ;;
-esac
+	AC_CACHE_CHECK([__sync extensions],
+		[libbacktrace_cv_sys_sync],
+		[
+			if test -n "${with_target_subdir}"; then
+				case "${host}" in
+					hppa*-*-hpux*)
+						libbacktrace_cv_sys_sync=no
+						;;
+					*)
+						libbacktrace_cv_sys_sync=yes
+						;;
+				esac
+			else
+				AC_LINK_IFELSE(
+					[
+						AC_LANG_PROGRAM([int i;],
+							[
+								__sync_bool_compare_and_swap(&i, i, i);
+								__sync_lock_test_and_set(&i, 1);
+								__sync_lock_release(&i);
+							]
+						)
+					],
+					[libbacktrace_cv_sys_sync=yes],
+					[libbacktrace_cv_sys_sync=no]
+				)
+			fi
+		]
+	)
+	BACKTRACE_SUPPORTS_THREADS=0
+	if test "$libbacktrace_cv_sys_sync" = "yes"; then
+		BACKTRACE_SUPPORTS_THREADS=1
+		AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1, [Define to 1 if you have the __sync functions])
+	fi
+	AC_SUBST(BACKTRACE_SUPPORTS_THREADS)
 
-backtrace_supported=yes
-AC_CHECK_HEADER([unwind.h],
-	[AC_CHECK_FUNC([_Unwind_Backtrace],
-		        [BACKTRACE_FILE="backtrace.lo simple.lo"],
-			[BACKTRACE_FILE="nounwind.lo"
-	                backtrace_supported=no])],
-	[BACKTRACE_FILE="nounwind.lo"
-	 backtrace_supported=no]
-)
-AC_SUBST(BACKTRACE_FILE)
-
-AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.])
-
-AC_CACHE_CHECK([__sync extensions],
-[libbacktrace_cv_sys_sync],
-[if test -n "${with_target_subdir}"; then
-   case "${host}" in
-   hppa*-*-hpux*) libbacktrace_cv_sys_sync=no ;;
-   *) libbacktrace_cv_sys_sync=yes ;;
-   esac
- else
-   AC_LINK_IFELSE(
-     [AC_LANG_PROGRAM([int i;],
-                      [__sync_bool_compare_and_swap (&i, i, i);
-                       __sync_lock_test_and_set (&i, 1);
-                       __sync_lock_release (&i);])],
-     [libbacktrace_cv_sys_sync=yes],
-     [libbacktrace_cv_sys_sync=no])
- fi])
-BACKTRACE_SUPPORTS_THREADS=0
-if test "$libbacktrace_cv_sys_sync" = "yes"; then
-  BACKTRACE_SUPPORTS_THREADS=1
-  AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1,
-	    [Define to 1 if you have the __sync functions])
-fi
-AC_SUBST(BACKTRACE_SUPPORTS_THREADS)
-
-# Test for __atomic support.
-AC_CACHE_CHECK([__atomic extensions],
-[libbacktrace_cv_sys_atomic],
-[if test -n "${with_target_subdir}"; then
-   libbacktrace_cv_sys_atomic=yes
- else
-   AC_LINK_IFELSE(
-     [AC_LANG_PROGRAM([int i;],
-     		      [__atomic_load_n (&i, __ATOMIC_ACQUIRE);
-		       __atomic_store_n (&i, 1, __ATOMIC_RELEASE);])],
-     [libbacktrace_cv_sys_atomic=yes],
-     [libbacktrace_cv_sys_atomic=no])
- fi])
-if test "$libbacktrace_cv_sys_atomic" = "yes"; then
-  AC_DEFINE([HAVE_ATOMIC_FUNCTIONS], 1,
-	    [Define to 1 if you have the __atomic functions])
-fi
+	# Test for __atomic support.
+	AC_CACHE_CHECK([__atomic extensions],
+		[libbacktrace_cv_sys_atomic],
+		[
+			if test -n "${with_target_subdir}"; then
+				libbacktrace_cv_sys_atomic=yes
+			else
+				AC_LINK_IFELSE(
+					[
+						AC_LANG_PROGRAM([int i;],
+							[
+								__atomic_load_n(&i, __ATOMIC_ACQUIRE);
+								__atomic_store_n(&i, 1, __ATOMIC_RELEASE);
+							]
+						)
+					],
+					[libbacktrace_cv_sys_atomic=yes],
+					[libbacktrace_cv_sys_atomic=no]
+				)
+			fi
+		]
+	)
+	if test "$libbacktrace_cv_sys_atomic" = "yes"; then
+		AC_DEFINE([HAVE_ATOMIC_FUNCTIONS], 1, [Define to 1 if you have the __atomic functions])
+	fi
 
-# The library needs to be able to read the executable itself.  Compile
-# a file to determine the executable format.  The awk script
-# filetype.awk prints out the file type.
-AC_CACHE_CHECK([output filetype],
-[libbacktrace_cv_sys_filetype],
-[filetype=
-AC_COMPILE_IFELSE(
-  [AC_LANG_PROGRAM([int i;], [int j;])],
-  [filetype=`${AWK} -f $srcdir/3rdparty/libbacktrace/filetype.awk conftest.$ac_objext`],
-  [AC_MSG_FAILURE([compiler failed])])
-libbacktrace_cv_sys_filetype=$filetype])
-
-# Match the file type to decide what files to compile.
-LIBBACKTRACE_FORMAT_FILE=
-backtrace_supports_data=yes
-case "$libbacktrace_cv_sys_filetype" in
-elf*) LIBBACKTRACE_FORMAT_FILE="elf.o" ;;
-pecoff) LIBBACKTRACE_FORMAT_FILE="pecoff.o"
-        backtrace_supports_data=no
-	;;
-xcoff*) LIBBACKTRACE_FORMAT_FILE="xcoff.o"
-        backtrace_supports_data=no
-        ;;
-macho*) LIBBACKTRACE_FORMAT_FILE="macho.o"
-        backtrace_supports_data=no
-        ;;
-*) AC_MSG_WARN([could not determine output file type])
-   LIBBACKTRACE_FORMAT_FILE="unknown.o"
-   backtrace_supported=no
-   ;;
-esac
-AC_SUBST(LIBBACKTRACE_FORMAT_FILE)
-
-# ELF defines.
-elfsize=
-case "$libbacktrace_cv_sys_filetype" in
-elf32) elfsize=32 ;;
-elf64) elfsize=64 ;;
-*)     elfsize=unused
-esac
-AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64])
-
-# XCOFF defines.
-xcoffsize=
-case "$libbacktrace_cv_sys_filetype" in
-xcoff32) xcoffsize=32 ;;
-xcoff64) xcoffsize=64 ;;
-*)       xcoffsize=unused
-esac
-AC_DEFINE_UNQUOTED([BACKTRACE_XCOFF_SIZE], [$xcoffsize], [XCOFF size: 32 or 64])
+	# The library needs to be able to read the executable itself.  Compile
+	# a file to determine the executable format.  The awk script
+	# filetype.awk prints out the file type.
+	AC_CACHE_CHECK([output filetype],
+		[libbacktrace_cv_sys_filetype],
+		[
+			filetype=
+			AC_COMPILE_IFELSE(
+				[AC_LANG_PROGRAM([int i;], [int j;])],
+				[filetype=`${AWK} -f $srcdir/3rdparty/libbacktrace/filetype.awk conftest.$ac_objext`],
+				[AC_MSG_FAILURE([compiler failed])]
+			)
+			libbacktrace_cv_sys_filetype=$filetype
+		]
+	)
 
-BACKTRACE_SUPPORTED=0
-if test "$backtrace_supported" = "yes"; then
-  BACKTRACE_SUPPORTED=1
-fi
-AC_SUBST(BACKTRACE_SUPPORTED)
+	# Match the file type to decide what files to compile.
+	LIBBACKTRACE_FORMAT_FILE=
+	backtrace_supports_data=yes
+	case "$libbacktrace_cv_sys_filetype" in
+		elf*)
+			LIBBACKTRACE_FORMAT_FILE="elf.o"
+			;;
+		pecoff)
+			LIBBACKTRACE_FORMAT_FILE="pecoff.o"
+			backtrace_supports_data=no
+			;;
+		xcoff*)
+			LIBBACKTRACE_FORMAT_FILE="xcoff.o"
+			backtrace_supports_data=no
+			;;
+		macho*)
+			LIBBACKTRACE_FORMAT_FILE="macho.o"
+			backtrace_supports_data=no
+			;;
+		*)
+			AC_MSG_WARN([could not determine output file type])
+			LIBBACKTRACE_FORMAT_FILE="unknown.o"
+			backtrace_supported=no
+			;;
+	esac
+	AC_SUBST(LIBBACKTRACE_FORMAT_FILE)
+
+	# ELF defines.
+	elfsize=
+	case "$libbacktrace_cv_sys_filetype" in
+		elf32)
+			elfsize=32
+			;;
+		elf64)
+			elfsize=64
+			;;
+		*)
+			elfsize=unused
+	esac
+	AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64])
+
+	# XCOFF defines.
+	xcoffsize=
+	case "$libbacktrace_cv_sys_filetype" in
+		xcoff32)
+			xcoffsize=32
+			;;
+		xcoff64)
+			xcoffsize=64
+			;;
+		*)
+			xcoffsize=unused
+	esac
+	AC_DEFINE_UNQUOTED([BACKTRACE_XCOFF_SIZE], [$xcoffsize], [XCOFF size: 32 or 64])
+
+	BACKTRACE_SUPPORTED=0
+	if test "$backtrace_supported" = "yes"; then
+		BACKTRACE_SUPPORTED=1
+	fi
+	AC_SUBST(BACKTRACE_SUPPORTED)
 
-BACKTRACE_SUPPORTS_DATA=0
-if test "$backtrace_supports_data" = "yes"; then
-  BACKTRACE_SUPPORTS_DATA=1
-fi
-AC_SUBST(BACKTRACE_SUPPORTS_DATA)
+	BACKTRACE_SUPPORTS_DATA=0
+	if test "$backtrace_supports_data" = "yes"; then
+		BACKTRACE_SUPPORTS_DATA=1
+	fi
+	AC_SUBST(BACKTRACE_SUPPORTS_DATA)
 
-AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no])
+	AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no])
 
-VIEW_FILE=mmapio.lo
-ALLOC_FILE=mmap.lo
+	VIEW_FILE=mmapio.lo
+	ALLOC_FILE=mmap.lo
 
-AC_SUBST(VIEW_FILE)
-AC_SUBST(ALLOC_FILE)
+	AC_SUBST(VIEW_FILE)
+	AC_SUBST(ALLOC_FILE)
 
-BACKTRACE_USES_MALLOC=0
-if test "$ALLOC_FILE" = "alloc.lo"; then
-  BACKTRACE_USES_MALLOC=1
-fi
-AC_SUBST(BACKTRACE_USES_MALLOC)
+	BACKTRACE_USES_MALLOC=0
+	if test "$ALLOC_FILE" = "alloc.lo"; then
+		BACKTRACE_USES_MALLOC=1
+	fi
+	AC_SUBST(BACKTRACE_USES_MALLOC)
 
-AC_CHECK_FUNC([dl_iterate_phdr], [have_dl_iterate_phdr=yes],
-	  [have_dl_iterate_phdr=no])
-if test "$have_dl_iterate_phdr" = "yes"; then
-  AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.])
-fi
+	AC_CHECK_FUNC([dl_iterate_phdr], [have_dl_iterate_phdr=yes], [have_dl_iterate_phdr=no])
+	if test "$have_dl_iterate_phdr" = "yes"; then
+		AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.])
+	fi
 
-# Check for the fcntl function.
-if test -n "${with_target_subdir}"; then
-   case "${host}" in
-   *-*-mingw*) have_fcntl=no ;;
-   spu-*-*) have_fcntl=no ;;
-   *) have_fcntl=yes ;;
-   esac
-else
-  AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no])
-fi
-if test "$have_fcntl" = "yes"; then
-  AC_DEFINE([HAVE_FCNTL], 1,
-	    [Define to 1 if you have the fcntl function])
-fi
+	# Check for the fcntl function.
+	if test -n "${with_target_subdir}"; then
+		case "${host}" in
+			*-*-mingw*)
+				have_fcntl=no
+				;;
+			spu-*-*)
+				have_fcntl=no
+				;;
+			*)
+				have_fcntl=yes
+				;;
+		esac
+	else
+		AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no])
+	fi
+	if test "$have_fcntl" = "yes"; then
+		AC_DEFINE([HAVE_FCNTL], 1, [Define to 1 if you have the fcntl function])
+	fi
 
-AC_CHECK_DECLS(strnlen)
-AC_CHECK_FUNCS(lstat readlink)
+	AC_CHECK_DECLS(strnlen)
+	AC_CHECK_FUNCS(lstat readlink)
 
-AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no])
-if test "$have_getexecname" = "yes"; then
-  AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.])
+	AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no])
+	if test "$have_getexecname" = "yes"; then
+		AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.])
+	fi
 fi
-
-
+AC_SUBST(USE_LIBBACKTRACE)
 
 #
 # Buildbot