pkgs/by-name/li/libbacktrace/0004-libbacktrace-Support-NIX_DEBUG_INFO_DIRS-environment.patch

   1 From 884ef7c843be906d62e4240c2a0e885dcd5a5726 Mon Sep 17 00:00:00 2001
   2 From: Jan Tojnar <jtojnar@gmail.com>
   3 Date: Sat, 24 Dec 2022 20:30:22 +0100
   4 Subject: [PATCH 4/4] libbacktrace: Support NIX_DEBUG_INFO_DIRS environment
   5  variable
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 Let’s make debug data lookup work on NixOS just like in gdb.
  11 ---
  12  elf.c | 11 +++++++++--
  13  1 file changed, 9 insertions(+), 2 deletions(-)
  14
  15 diff --git a/elf.c b/elf.c
  16 index ccffa95..e86950d 100644
  17 --- a/elf.c
  18 +++ b/elf.c
  19 @@ -6946,11 +6946,18 @@ elf_add (struct backtrace_state *state, const char *filename, int descriptor,
  20
  21    if (buildid_data != NULL)
  22      {
  23 +      const char *debug_directories_immutable;
  24 +      const char *nix_debug = getenv ("NIX_DEBUG_INFO_DIRS");
  25 +      if (nix_debug != NULL)
  26 +        debug_directories_immutable = nix_debug;
  27 +      else
  28 +        debug_directories_immutable = SYSTEM_DEBUG_DIR;
  29 +
  30        int d;
  31 -      char debug_directories[strlen(SYSTEM_DEBUG_DIR) + 1];
  32 +      char debug_directories[strlen(debug_directories_immutable) + 1];
  33        char *debug_dir;
  34
  35 -      strcpy(debug_directories, SYSTEM_DEBUG_DIR);
  36 +      strcpy(debug_directories, debug_directories_immutable);
  37
  38        debug_dir = strtok (debug_directories, ":");
  39        while (debug_dir != NULL)
  40 --
  41 2.43.1
  42