C++ macos中使用gdb的热点

我总是在Linux中使用gdb，它工作正常，这是我第一次在mac中使用gdb，这与Linux不同

(gdb) b main
Breakpoint 1 at 0x100000ec4
(gdb) r
Starting program: /Users/vinllen/code/tmp/lhm/homework
warning: Could not open OSO archive file "/BinaryCache/corecrypto/corecrypto-233.1.2~26/Symbols/BuiltProducts/libcorecrypto_static.a"
warning: `/BinaryCache/coreTLS/coreTLS-35.20.2~10/Objects/coretls.build/coretls.build/Objects-normal/x86_64/system_coretls_vers.o': can't open to read symbols: No such file or directory.
warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.20.2~10/Symbols/BuiltProducts/libcoretls_ciphersuites.a"
warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.20.2~10/Symbols/BuiltProducts/libcoretls_handshake.a"
warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.20.2~10/Symbols/BuiltProducts/libcoretls_record.a"
warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.20.2~10/Symbols/BuiltProducts/libcoretls_stream_parser.a"

Breakpoint 1, 0x0000000100000ec4 in main ()
(gdb) l
No symbol table is loaded.  Use the "file" command.
(gdb) n
Single stepping until exit from function main,
which has no line number information.

看起来命令l和n无法正确执行，有什么问题

这是我的Makefile：

objects = main.o conversion.o slitemlist.o uims.o testdrivers.o

homework:$(objects)
    g++ -o homework $(objects)

conversion.o: conversion.h base.h
slitemlist.o: slitemlist.h base.h
uims.o: conversion.h base.h conversion.h slitemlist.h
testdrivers.o: testdrivers.h

.PHONY: clean
clean:
    rm homework $(objects)

这是我的Makefile：

objects = main.o conversion.o slitemlist.o uims.o testdrivers.o

homework:$(objects)
    g++ -o homework $(objects)

conversion.o: conversion.h base.h
slitemlist.o: slitemlist.h base.h
uims.o: conversion.h base.h conversion.h slitemlist.h
testdrivers.o: testdrivers.h

.PHONY: clean
clean:
    rm homework $(objects)

在Linux上调试这个程序也不会很愉快：编译它时没有调试符号（

-g

标志）

您真正的问题不是“如何在MacOS上使用GDB”，而是“如何编写Makefile以便调试”

您应该在

Makefile

中添加这样的行：

CFLAGS = -g
CXFLAGS = -g  # if building C++

---

我建议在OSX上使用

lldb

。官方的

gdb

从未完全支持OSX，苹果的

gdb

也已经停产。我猜这些警告与您的问题有关。看起来我应该添加额外的参数-g，但是应该将此参数放在哪里。感谢Alexander，

lldb

中的命令是否与

gdb

相同？有些相同，有些不相同。