GCC 4.7.3和Mac GDB 7.6 - 奇怪的步進問題

我最近在我的OS X 10.7系統上安裝GCC 4.7.3和GDB 7.6通過MacPorts的是能夠編譯C++代碼11。我不能使用Apple的自制clang ++和gdb，因爲它不允許我正確調試標準模板庫代碼（例如，如果我解引用列表迭代器，程序崩潰）。GCC 4.7.3和Mac GDB 7.6 - 奇怪的步進問題

現在，隨着新的GCC/GDB的組合，我有一些奇怪的問題，進入功能。拿這個小例子：

#include <stdio.h> 

class A { 
public: 
    virtual void testMethod() { 
     printf("test in A\n"); 
    } 
}; 

void test(A &a) { 
    printf("asdf\n"); 
    a.testMethod(); // here, stepping works with -std=c++11 
} 

int main() { 
    A a; 
    a.testMethod(); 
    test(a); 
    a.testMethod(); 
    return 0; 
}

如果我編譯g++ -O0 -ggdb test.cpp代碼，GDB不會步入A::testMethod可言。我可以通過在A::testMethod內指定代碼行來設置斷點，但不能通過指定方法名稱（b A::testMethod()）來設置斷點。

更奇怪的是，如果我使用g++ -O0 -ggdb -std=c++11 test.cpp進行編譯，GDB會從void test()調用testMethod。從主，步進仍然不起作用。但是，現在，我可以通過指定方法名稱來設置斷點。此外，只要我在GDB中啓動程序，就會收到GDB警告，如相關問題中所述。無論我是否指定-std=c++11，都會顯示這些警告。

warning: Could not open OSO archive file "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libstdcxx-devel/work/build/./gcc/libgcc_eh.a" 
warning: Could not open OSO archive file "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libstdcxx-devel/work/build/x86_64-apple-darwin11/libstdc++-v3/src/../libsupc++/.libs/libsupc++convenience.a" 
warning: Could not open OSO archive file "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libstdcxx-devel/work/build/x86_64-apple-darwin11/libstdc++-v3/src/../src/c++11/.libs/libc++11convenience.a" 
warning: Could not open OSO archive file "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libstdcxx-devel/work/build/x86_64-apple-darwin11/libstdc++-v3/src/../src/c++98/.libs/libc++98convenience.a" 
warning: `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libstdcxx-devel/work/build/x86_64-apple-darwin11/libstdc++-v3/src/.libs/compatibility-atomic-c++0x.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libstdcxx-devel/work/build/x86_64-apple-darwin11/libstdc++-v3/src/.libs/compatibility-c++0x.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libstdcxx-devel/work/build/x86_64-apple-darwin11/libstdc++-v3/src/.libs/compatibility-debug_list-2.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libstdcxx-devel/work/build/x86_64-apple-darwin11/libstdc++-v3/src/.libs/compatibility-debug_list.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libstdcxx-devel/work/build/x86_64-apple-darwin11/libstdc++-v3/src/.libs/compatibility-thread-c++0x.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libstdcxx-devel/work/build/x86_64-apple-darwin11/libstdc++-v3/src/.libs/compatibility.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/_muldi3_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/addtf3_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/darwin-64_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/divtf3_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/emutls_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/enable-execute-stack_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/eqtf2_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/extenddftf2_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/extendsftf2_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/extendxftf2_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/fixtfdi_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/fixtfsi_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/fixtfti_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/fixunstfdi_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/fixunstfsi_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/fixunstfti_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/floatditf_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/floatsitf_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/floattitf_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/floatunditf_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/floatunsitf_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/floatuntitf_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/getf2_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/letf2_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/multf3_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/negtf2_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/subtf3_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/trunctfdf2_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/trunctfsf2_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/trunctfxf2_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/unordtf2_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/unwind-c_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/unwind-dw2-fde-darwin_s.o': can't open to read symbols: No such file or directory. 
warning: `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc47/gcc47/work/build/x86_64-apple-darwin11/libgcc/unwind-dw2_s.o': can't open to read symbols: No such file or directory.

我知道以下問題： Debugging Problems， Weird GDB messages， GDB error message， GDB fails on Mountain Lion，但他們並沒有幫助我。指定-gdwarf-2 -gstrict-dwarf也沒有幫助。

CNC中的nm輸出是一樣的在兩種情況下：

0000000100001068 s GCC_except_table0 
00000001000010c0 S _NXArgc 
00000001000010c8 S _NXArgv 
       U __Unwind_Resume 
0000000100000e34 T __Z4testR1A 
0000000100000eae T __ZN1A10testMethodEv 
00000001000010b0 S __ZTI1A 
0000000100000f1d S __ZTS1A 
0000000100001090 S __ZTV1A 
       U __ZTVN10__cxxabiv117__class_type_infoE 
       U ___gxx_personality_v0 
00000001000010d8 S ___progname 
0000000100000000 T __mh_execute_header 
00000001000010d0 S _environ 
       U _exit 
0000000100000e61 T _main 
       U _puts 
0000000100001000 s _pvars 
       U dyld_stub_binder 
0000000100000df8 T start

有沒有人設法讓GCC 4.7和一些適當的調試器在OS X Lion的工作？

來源

2013-05-26 Entropia

確實找到了解決辦法？我遇到了非常類似的問題（http://stackoverflow.com/questions/22581645/gdb-7-7-does-not-step-in-on-os-x-mavericks-with-gcc4-7-3-macports ） – Denis

不，我很抱歉。我最終放棄了。 – Entropia

我嘗試編譯這樣的....它工作正常.... 你可以嘗試使用-g選項嗎？

例如：g ++ -g test.cpp -o test

來源

2013-05-27 10:57:39

不幸的是，這並沒有幫助。結果與使用-ggdb編譯一樣。你是如何安裝GCC/GDB的？ – Entropia

對不起....我嘗試了GCC 4.5.3中的CYGWIN代碼。你是否試過在二進制文件上使用nm命令來查看符號是否存在？ –

我在問題中增加了「nm」輸出。我對'nm'不是很熟悉，但是，我認爲符號是存在的。至少，GDB製表符完成它們。另外，我不認爲這是一般的GCC/GDB問題，在Mac上更是一個問題。在Ubuntu上，一切正常。 – Entropia

GCC 4.7.3和Mac GDB 7.6 - 奇怪的步進問題

回答

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