Allow to disable Stacktrace support

Enable backtrace stuff only if GNU C library used, because current
backtrace implementation based  on  <execinfo.h> , which is not a
part of standard C library, it is a GNU extension.

This will be usefull when building  with  custom POSIX-compilant C
library (like musl) and no <execinfo.h> available.

Note: configure script will detect presence of  <execinfo.h>  and
enable/disable feature depending on it.

Feature is enabled by default.

CMakeLists.txt

@@ -43,13 +43,13 @@ option(GUI "Allows to disable GUI for headless running. Disables QtDBus and the
 
 option(WEBUI "Allows to disable the WebUI." ON)
 
-if (WIN32)
+option(STACKTRACE "Enable stacktrace feature" ON)
-    option(STACKTRACE_WIN "")
+
-else (WIN32)
+if (UNIX)
     cmake_dependent_option(SYSTEMD "Install the systemd service file (headless only)" OFF
         "NOT GUI" OFF)
     cmake_dependent_option(DBUS "Enable use of QtDBus (GUI only)" ON "GUI" OFF)
-endif(WIN32)
+endif(UNIX)
 
 
 add_subdirectory(src)

configure

@@ -717,6 +717,7 @@ enable_dependency_tracking
 enable_silent_rules
 with_qtsingleapplication
 enable_debug
+enable_stacktrace
 enable_gui
 enable_systemd
 enable_webui
@@ -1382,6 +1383,7 @@ Optional Features:
   --enable-silent-rules   less verbose build output (undo: "make V=1")
   --disable-silent-rules  verbose build output (undo: "make V=0")
   --enable-debug          Enable debug build
+  --enable-stacktrace     Enable stacktrace feature (default=auto)
   --disable-gui           Disable the GUI for headless running. Disables
                           QtDBus and the GeoIP Database.
   --enable-systemd        Install the systemd service file (headless only).
@@ -4189,6 +4191,14 @@ else
 fi
 
 
+# Check whether --enable-stacktrace was given.
+if test "${enable_stacktrace+set}" = set; then :
+  enableval=$enable_stacktrace;
+else
+  enable_stacktrace=auto
+fi
+
+
 # Check whether --enable-gui was given.
 if test "${enable_gui+set}" = set; then :
   enableval=$enable_gui;
@@ -4389,6 +4399,39 @@ $as_echo "$enable_debug" >&6; }
         as_fn_error $? "Unknown option \"$enable_debug\". Use either \"yes\" or \"no\"." "$LINENO" 5 ;;
 esac
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable the stacktrace feature" >&5
+$as_echo_n "checking whether to enable the stacktrace feature... " >&6; }
+
+case "x$enable_stacktrace" in #(
+  "xno") :
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+              QBT_REMOVE_CONFIG="$QBT_REMOVE_CONFIG stacktrace" ;; #(
+  "xyes") :
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+               QBT_ADD_CONFIG="$QBT_ADD_CONFIG stacktrace" ;; #(
+  "xauto") :
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <execinfo.h>
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+                QBT_ADD_CONFIG="$QBT_ADD_CONFIG stacktrace"
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+                QBT_REMOVE_CONFIG="$QBT_REMOVE_CONFIG stacktrace"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext ;; #(
+  *) :
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_stacktrace" >&5
+$as_echo "$enable_stacktrace" >&6; }
+        as_fn_error $? "Unknown option \"$enable_stacktrace\". Use either \"yes\" or \"no\"." "$LINENO" 5 ;;
+esac
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable the GUI" >&5
 $as_echo_n "checking whether to enable the GUI... " >&6; }
 case "x$enable_gui" in #(
@@ -4636,7 +4679,6 @@ esac
 
 
 
-
 # Check whether --with-boost was given.
 if test "${with_boost+set}" = set; then :
   withval=$with_boost;

configure.ac

@@ -24,6 +24,12 @@ AC_ARG_ENABLE(debug,
               [],
               [enable_debug=no])
 
+AC_ARG_ENABLE(stacktrace,
+              [AS_HELP_STRING([--enable-stacktrace],
+                              [Enable stacktrace feature (default=auto)])],
+              [],
+              [enable_stacktrace=auto])
+
 AC_ARG_ENABLE(gui,
               [AS_HELP_STRING([--disable-gui],
                               [Disable the GUI for headless running. Disables QtDBus and the GeoIP Database.])],
@@ -80,6 +86,23 @@ AS_CASE(["x$enable_debug"],
         [AC_MSG_RESULT([$enable_debug])
         AC_MSG_ERROR([Unknown option "$enable_debug". Use either "yes" or "no".])])
 
+AC_MSG_CHECKING([whether to enable the stacktrace feature])
+AS_CASE(["x$enable_stacktrace"],
+        ["xno"],
+              [AC_MSG_RESULT([no])
+              QBT_REMOVE_CONFIG="$QBT_REMOVE_CONFIG stacktrace"],
+        ["xyes"],
+               [AC_MSG_RESULT([yes])
+               QBT_ADD_CONFIG="$QBT_ADD_CONFIG stacktrace"],
+        ["xauto"],
+                [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <execinfo.h>]])],
+                [AC_MSG_RESULT([yes])
+                QBT_ADD_CONFIG="$QBT_ADD_CONFIG stacktrace"],
+                [AC_MSG_RESULT([no])
+                QBT_REMOVE_CONFIG="$QBT_REMOVE_CONFIG stacktrace"])],
+        [AC_MSG_RESULT([$enable_stacktrace])
+        AC_MSG_ERROR([Unknown option "$enable_stacktrace". Use either "yes" or "no".])])
+
 AC_MSG_CHECKING([whether to enable the GUI])
 AS_CASE(["x$enable_gui"],
         ["xyes"],

src/CMakeLists.txt

@@ -51,9 +51,9 @@ if (NOT WEBUI)
     add_definitions(-DDISABLE_WEBUI)
 endif (NOT WEBUI)
 
-if (STACKTRACE_WIN)
+if (STACKTRACE)
-    add_definitions(-DSTACKTRACE_WIN)
+    add_definitions(-DSTACKTRACE)
-endif(STACKTRACE_WIN)
+endif(STACKTRACE)
 # nogui {
 #     TARGET = qbittorrent-nox
 # } else {

src/app/CMakeLists.txt

@@ -53,16 +53,16 @@ if (WIN32)
     list(APPEND QBT_APP_SOURCES ../qbittorrent.exe.manifest)
 endif (WIN32)
 
-if (UNIX)
+if (STACKTRACE)
+    if (UNIX)
         list(APPEND QBT_APP_HEADERS stacktrace.h)
-endif (UNIX)
+    else (UNIX)
-
-if (STACKTRACE_WIN)
         list(APPEND QBT_APP_HEADERS stacktrace_win.h)
         if (GUI)
             list(APPEND QBT_APP_HEADERS stacktrace_win_dlg.h)
         endif (GUI)
-endif (STACKTRACE_WIN)
+    endif (UNIX)
+endif (STACKTRACE)
 
 # usesystemqtsingleapplication {
 #     nogui {

src/app/app.pri

@@ -25,13 +25,17 @@ SOURCES += \
     $$PWD/filelogger.cpp \
     $$PWD/main.cpp
 
-unix: HEADERS += $$PWD/stacktrace.h
+stacktrace {
-strace_win {
+    unix {
+        HEADERS += $$PWD/stacktrace.h
+    }
+    else {
         HEADERS += $$PWD/stacktrace_win.h
         !nogui {
             HEADERS += $$PWD/stacktrace_win_dlg.h
             FORMS += $$PWD/stacktrace_win_dlg.ui
         }
+    }
 }
 
 # upgrade code

src/app/main.cpp

@@ -57,17 +57,15 @@ Q_IMPORT_PLUGIN(QICOPlugin)
 #endif
 #endif // DISABLE_GUI
 
+#include <signal.h>
+#ifdef STACKTRACE
 #ifdef Q_OS_UNIX
-#include <signal.h>
-#include <execinfo.h>
 #include "stacktrace.h"
-#endif // Q_OS_UNIX
+#else
-
-#ifdef STACKTRACE_WIN
-#include <signal.h>
 #include "stacktrace_win.h"
 #include "stacktrace_win_dlg.h"
-#endif //STACKTRACE_WIN
+#endif // Q_OS_UNIX
+#endif //STACKTRACE
 
 #include "application.h"
 #include "base/profile.h"
@@ -77,9 +75,10 @@ Q_IMPORT_PLUGIN(QICOPlugin)
 #include "upgrade.h"
 
 // Signal handlers
-#if defined(Q_OS_UNIX) || defined(STACKTRACE_WIN)
 void sigNormalHandler(int signum);
+#ifdef STACKTRACE
 void sigAbnormalHandler(int signum);
+#endif
 // sys_signame[] is only defined in BSD
 const char *sysSigName[] = {
 #if defined(Q_OS_WIN)
@@ -94,7 +93,6 @@ const char *sysSigName[] = {
     "SIGPWR", "SIGUNUSED"
 #endif
 };
-#endif
 
 #if !defined Q_OS_WIN && !defined Q_OS_HAIKU
 void reportToUser(const char* str);
@@ -255,9 +253,9 @@ int main(int argc, char *argv[])
             showSplashScreen();
 #endif
 
-#if defined(Q_OS_UNIX) || defined(STACKTRACE_WIN)
         signal(SIGINT, sigNormalHandler);
         signal(SIGTERM, sigNormalHandler);
+#ifdef STACKTRACE
         signal(SIGABRT, sigAbnormalHandler);
         signal(SIGSEGV, sigAbnormalHandler);
 #endif
@@ -281,7 +279,6 @@ void reportToUser(const char* str)
 }
 #endif
 
-#if defined(Q_OS_UNIX) || defined(STACKTRACE_WIN)
 void sigNormalHandler(int signum)
 {
 #if !defined Q_OS_WIN && !defined Q_OS_HAIKU
@@ -295,6 +292,7 @@ void sigNormalHandler(int signum)
     qApp->exit();  // unsafe, but exit anyway
 }
 
+#ifdef STACKTRACE
 void sigAbnormalHandler(int signum)
 {
     const char *sigName = sysSigName[signum];
@@ -307,16 +305,18 @@ void sigAbnormalHandler(int signum)
     reportToUser(sigName);
     reportToUser("\n");
     print_stacktrace();  // unsafe
-#endif // !defined Q_OS_WIN && !defined Q_OS_HAIKU
+#endif
-#ifdef STACKTRACE_WIN
+
+#if defined Q_OS_WIN
     StraceDlg dlg;  // unsafe
     dlg.setStacktraceString(QLatin1String(sigName), straceWin::getBacktrace());
     dlg.exec();
-#endif // STACKTRACE_WIN
+#endif
+
     signal(signum, SIG_DFL);
     raise(signum);
 }
-#endif // defined(Q_OS_UNIX) || defined(STACKTRACE_WIN)
+#endif // STACKTRACE
 
 #if !defined(DISABLE_GUI)
 void showSplashScreen()

src/src.pro

@@ -33,13 +33,17 @@ nogui {
         LIBS += -lobjc
     }
 }
+
 nowebui {
     DEFINES += DISABLE_WEBUI
 }
-strace_win {
+
-    DEFINES += STACKTRACE_WIN
+stacktrace {
+    DEFINES += STACKTRACE
+    win32 {
         DEFINES += STACKTRACE_WIN_PROJECT_PATH=$$PWD
         DEFINES += STACKTRACE_WIN_MAKEFILE_PATH=$$OUT_PWD
+    }
 }
 
 CONFIG(debug, debug|release): message(Project is built in DEBUG mode.)

winconf.pri

@@ -55,7 +55,7 @@ else {
 }
 
 # Stack trace support can be enabled in 'conf.pri'
-strace_win {
+stacktrace {
     win32-g++* {
         contains(QMAKE_HOST.arch, x86) {
             # i686 arch requires frame pointer preservation