fix: Build static postgrest with GSSAPI support

Resolves #2815

CHANGELOG.md

@@ -12,6 +12,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ### Fixed
 
  - #3149, Misleading "Starting PostgREST.." logs on schema cache reloading - @steve-chavez
+ - #2815, Build static executable with GSSAPI support - @wolfgangwalther
 
 ### Deprecated
 

nix/libpq.nix

@@ -25,12 +25,13 @@ stdenv.mkDerivation {
     "--without-gssapi"
     "--without-icu"
     "--without-readline"
+    "--with-gssapi"
     "--with-openssl"
     "--with-system-tzdata=${tzdata}/share/zoneinfo"
   ];
 
   nativeBuildInputs = [ pkg-config tzdata ];
-  buildInputs = [ openssl zlib ];
+  buildInputs = [ libkrb5 openssl zlib ];
 
   buildFlags = [ "submake-libpq" "submake-libpgport" ];
 
@@ -48,6 +49,12 @@ stdenv.mkDerivation {
     runHook postInstall
   '';
 
+  # To avoid linking errors in the static build with gssapi
+  postInstall = ''
+    substituteInPlace $out/lib/pkgconfig/libpq.pc\
+      --replace "Requires.private:" "Requires.private: krb5-gssapi,"
+  '';
+
   outputs = [ "out" ];
 
   meta = with lib; {

nix/static.nix

@@ -36,8 +36,11 @@ let
           # static libs for libpq.
           nativeBuildInputs = prevAttrs.nativeBuildInputs ++ [ pkgs.pkgsStatic.pkg-config ];
 
-          buildInputs = [
-            pkgsStatic.openssl
+          buildInputs = prevAttrs.buildInputs ++ [
+            (pkgsStatic.libkrb5.overrideAttrs (finalAttrs: prevAttrs: {
+              # disable keyutils dependency, to avoid linking errors
+              configureFlags = prevAttrs.configureFlags ++ [ "--without-keyutils" ];
+            }))
           ];
         });
       });