From cedf46f81545d5fa61cdd6edab7b4d2e750a2bf3 Mon Sep 17 00:00:00 2001
From: whispers <whispersofthedawn@duck.com>
Date: Fri, 24 Jul 2026 15:02:23 -0400
Subject: [PATCH] apache-orc: explicitly specify C++17 for abseil-cpp

abseil exposes different interfaces depending on what is available in
`std` in a given C++ standard. gcc 16 defaults to C++20, thus causing
the default abseil-cpp to expose a different interface than the one
apache-orc (built with C++17) expects. this leads to a
great deal of "error: 'partial_ordering' has not been declared in 'std'"
and similar originating from abseil's types/compare.h. thus, we
explicitly override abseil to specify the desired C++ standard. this
happens through protobuf as abseil-cpp is in its propagatedBuildInputs.
---
 pkgs/by-name/ap/apache-orc/package.nix | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/pkgs/by-name/ap/apache-orc/package.nix b/pkgs/by-name/ap/apache-orc/package.nix
index 42d546715507..53391c6a1545 100644
--- a/pkgs/by-name/ap/apache-orc/package.nix
+++ b/pkgs/by-name/ap/apache-orc/package.nix
@@ -4,6 +4,7 @@
   fetchFromGitHub,
   fetchurl,
   cmake,
+  abseil-cpp_202601,
   gtest,
   lz4,
   protobuf,
@@ -13,6 +14,11 @@
 }:
 
 let
+  # This standard needs to match the version that orc uses, or compilation
+  # fails if the C++ standard version is different from the compiler's default.
+  # https://github.com/apache/orc/blob/3738b82366ba64cacae450e7e0e1702c66148afe/CMakeLists.txt#L108
+  protobuf' = protobuf.override { abseil-cpp = abseil-cpp_202601.override { cxxStandard = "17"; }; };
+
   orc-format =
     let
       version = "1.1.1";
@@ -57,7 +63,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     gtest
     lz4
-    protobuf
+    protobuf'
     snappy
     zlib
     zstd
@@ -81,7 +87,7 @@ stdenv.mkDerivation (finalAttrs: {
     GTEST_HOME = gtest.dev;
     LZ4_HOME = lz4;
     ORC_FORMAT_URL = orc-format;
-    PROTOBUF_HOME = protobuf;
+    PROTOBUF_HOME = protobuf';
     SNAPPY_HOME = snappy.dev;
     ZLIB_HOME = zlib.dev;
     ZSTD_HOME = zstd.dev;