diff options
Diffstat (limited to 'gnu/packages/patches')
| -rw-r--r-- | gnu/packages/patches/dwarves-threading-reproducibility.patch | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gnu/packages/patches/dwarves-threading-reproducibility.patch b/gnu/packages/patches/dwarves-threading-reproducibility.patch new file mode 100644 index 0000000000..8771ca6b0d --- /dev/null +++ b/gnu/packages/patches/dwarves-threading-reproducibility.patch @@ -0,0 +1,23 @@ +Retrieved from nixpkgs. + +This causes pahole to use '-j1' (single thread) when SOURCE_DATE_EPOCH +is set, to ensure it produces reproducible output. + +diff --git a/pahole.c b/pahole.c +index 6fc4ed6..a4e306f 100644 +--- a/pahole.c ++++ b/pahole.c +@@ -1687,8 +1687,11 @@ static error_t pahole__options_parser(int key, char *arg, + class_name = arg; break; + case 'j': + #if _ELFUTILS_PREREQ(0, 178) +- conf_load.nr_jobs = arg ? atoi(arg) : +- sysconf(_SC_NPROCESSORS_ONLN) * 1.1; ++ // Force single thread if reproducibility is desirable. ++ if (!getenv("SOURCE_DATE_EPOCH")) { ++ conf_load.nr_jobs = arg ? atoi(arg) : ++ sysconf(_SC_NPROCESSORS_ONLN) * 1.1; ++ } + #else + fputs("pahole: Multithreading requires elfutils >= 0.178. Continuing with a single thread...\n", stderr); + #endif |