1 qBreakpad.pri: Add A typical configuration of adding debug informat…

…ion in release build

2 README.md: Modify and add some tips on building and decoding dumps

README.md

@@ -4,7 +4,7 @@
 
 qBreakpad is Qt library to use google-breakpad crash reporting facilities (and using it conviniently).
 Supports
-* Windows (but crash dump decoding will not work with MinGW compiler)
+* Windows
 * Linux
 * MacOS X
 
@@ -41,4 +41,16 @@ Getting started with Google Breakpad
 ----------------
 https://chromium.googlesource.com/breakpad/breakpad/+/master/docs/getting_started_with_breakpad.md
 
+Tips of building and dump's decoding
+----------------
+* MinGW:
+You can try to use the tool **cv2pdb**(https://github.com/rainers/cv2pdb), to strip the debug information from the binary and generate the pdb file, 
+then use Visual Studio to decode the dump conveniently.
+* Linux:
+You can use the tool **minidump-2-core** of Google Breakpad, to convert the dump file to core file, then use QtCreator to decode the dump conveniently.
+* Mac:
+Refer to qBreakpad's Wiki
+
+Wiki
+----------------
 Detail description about integration `qBreakpad` into your system and platform you could find in **[Wiki](https://github.com/buzzySmile/qBreakpad/wiki)**.

qBreakpad.pri

@@ -8,3 +8,44 @@ HEADERS += \
 
 LIBS += \
     -L$$PWD/handler -lqBreakpad
+
+# ---- A typical configuration of adding debug information in release build ----
+# Test environment:
+# Windows: qt5.6.2 mingw4.9.2-32bit and qt5.6.2 msvc2015-32bit
+# Linux: qt5.6.2 gcc5.3.1
+# Mac: do not test
+
+*-g++ {
+#message($$QMAKE_CXXFLAGS_DEBUG)  # => -g
+#message($$QMAKE_CXXFLAGS_RELEASE)  # => -O2
+#message($$QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO)  # => -O2 -g
+#message($$QMAKE_CXXFLAGS_RELEASE_WITH_DEBUGINFO)  # => linux: -O2 -g; mingw: nothing
+#message($$QMAKE_LFLAGS_DEBUG)  # => nothing
+#message($$QMAKE_LFLAGS_RELEASE)  # => linux: -Wl,-O1; mingw: -Wl,-s
+
+# Add debug information, delete compilation optimization
+QMAKE_CFLAGS_RELEASE += -g  # QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO is '-O2 -g', but don't add '-O2'
+QMAKE_CFLAGS_RELEASE -= -O2
+QMAKE_CXXFLAGS_RELEASE += -g  # QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO
+QMAKE_CXXFLAGS_RELEASE -= -O2
+
+QMAKE_LFLAGS_RELEASE -= -Wl,-s  # Delete the default parameter '-Wl,-s'(delete debug information in linking£©
+#QMAKE_LFLAGS_RELEASE -= -Wl,-O1  # In linking's -O1, only -fmerge-constants valid, but it don't affect debug info. So don't delete -O1
+}
+else {
+#message($$QMAKE_CXXFLAGS_DEBUG)  # => -Zi -MDd
+#message($$QMAKE_CXXFLAGS_RELEASE)  # => -O2 -MD
+#message($$QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO)  # => -O2 -Zi -MD
+#message($$QMAKE_CXXFLAGS_RELEASE_WITH_DEBUGINFO)  # => -O2 -Zi -MD
+#message($$QMAKE_LFLAGS_DEBUG)  # => nothing
+#message($$QMAKE_LFLAGS_RELEASE)  # => /INCREMENTAL:NO
+
+# Add debug information, delete compilation optimization
+QMAKE_CFLAGS_RELEASE += -Zi /Od
+QMAKE_CFLAGS_RELEASE -= -O2
+QMAKE_CXXFLAGS_RELEASE += -Zi /Od
+QMAKE_CXXFLAGS_RELEASE -= -O2
+
+QMAKE_LFLAGS_RELEASE += /DEBUG  # This disable /INCREMENTAL:NO implicitly
+}
+# ---- A typical configuration of adding debug information in release build ----