How to build to debug with gdb?

From: Giuseppe Crino' <giuscri@gmail.com>
Date: Aug 27, 2019, 16:27 UTC
Message-ID: <20190827162725.GA29263@instance-template-2.europe-west6-a.c.vaulted-journal-250706.internal>

Hello, to debug some issues I built and installed git via

$ make prefix=/usr/local DEVELOPER=1 CFLAGS="-O0 -g" $ sudo make install $ git --version # git version 2.23.0.40.g4d8aada92f

But it seems there's still some optimization going on that prevents gdb from working correctly.

For example

(gdb) b builtin/config.c:752 Breakpoint 1 at 0x43942: file builtin/config.c, line 752. (gdb) r config --global --edit Starting program: /usr/local/bin/git config --global --edit [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libth read_db.so.1".

Breakpoint 1, cmd_config (argc=0, argv=<optimized out>,
    prefix=<optimized out>) at builtin/config.c:753
    753                             if (fd >= 0) {
    (gdb) p fd
    $1 = <optimized out>

 What am I missing?

 -Giuseppe