Merge pull request #318132 from risicle/ris-libdc1394-disable-trivialautovarinit

libdc1394: disable `trivialautovarinit` hardening flag

doc/stdenv/stdenv.chapter.md

@@ -1538,6 +1538,12 @@ Adds the `-ftrivial-auto-var-init=pattern` compiler option. This causes "trivial
 
 Use of this flag is controversial as it can prevent tools that detect uninitialized variable use (such as valgrind) from operating correctly.
 
+This should be turned off or fixed for build errors such as:
+
+```
+sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates
+```
+
 #### `stackclashprotection` {#stackclashprotection}
 
 This flag adds the `-fstack-clash-protection` compiler option, which causes growth of a program's stack to access each successive page in order. This should force the guard page to be accessed and cause an attempt to "jump over" this guard page to crash.

pkgs/development/libraries/libdc1394/default.nix

@@ -10,6 +10,11 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-U3zreN087ycaGD9KF2GR0c7PhfAlUg5r03WLDhnmYJ8=";
   };
 
+  hardeningDisable = [
+    # "sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates"
+    "trivialautovarinit"
+  ];
+
   buildInputs = [ libusb1 ]
     ++ lib.optional stdenv.isLinux libraw1394
     ++ lib.optional stdenv.isDarwin CoreServices;