pkgsStatic.postgresql: fix build

The underlying problem was fixed as a side-effect of [1], for reasons
unknown to me. In the current state, it's enough to disable a few
breaking dependencies to make the build pass.

Note, that this builds the full package, including backend. However, the
backend is not working, yet: Loading shared modules, which PostgreSQL
heavily depends is still broken. Further, all binaries in the default
output, even client binaries such as psql, are currently dynamically
linked against libpq.so. While the current autoconf based build system
doesn't support changing this, this might be possible in the future with
meson.

However, not all is bad: Fixing the build allows using the static
libpq.a library, which is probably the one thing that most users want
from pkgsStatic.postgresql anyway.

Resolves NixOS#191920

[1]: 7797728

pkgs/servers/sql/postgresql/generic.nix

@@ -94,16 +94,16 @@ let
       readline
       openssl
       (libxml2.override {enableHttp = true;})
-      icu
     ]
+      ++ lib.optionals (!stdenv'.hostPlatform.isStatic) [ icu ]
       ++ lib.optionals (olderThan "13") [ libxcrypt ]
       ++ lib.optionals jitSupport [ llvmPackages.llvm ]
       ++ lib.optionals lz4Enabled [ lz4 ]
       ++ lib.optionals zstdEnabled [ zstd ]
       ++ lib.optionals systemdSupport' [ systemdLibs ]
       ++ lib.optionals pythonSupport [ python3 ]
       ++ lib.optionals gssSupport [ libkrb5 ]
-      ++ lib.optionals stdenv'.hostPlatform.isLinux [ linux-pam ]
+      ++ lib.optionals (stdenv'.hostPlatform.isLinux && !stdenv'.hostPlatform.isStatic) [ linux-pam ]
       ++ lib.optionals (!stdenv'.hostPlatform.isDarwin) [ libossp_uuid ];
 
     nativeBuildInputs = [
@@ -133,7 +133,7 @@ let
     configureFlags = [
       "--with-openssl"
       "--with-libxml"
-      "--with-icu"
+      (lib.withFeature (!stdenv'.hostPlatform.isStatic) "icu")
       "--sysconfdir=/etc"
       "--with-system-tzdata=${tzdata}/share/zoneinfo"
       "--enable-debug"
@@ -144,7 +144,7 @@ let
       ++ lib.optionals gssSupport [ "--with-gssapi" ]
       ++ lib.optionals pythonSupport [ "--with-python" ]
       ++ lib.optionals jitSupport [ "--with-llvm" ]
-      ++ lib.optionals stdenv'.hostPlatform.isLinux [ "--with-pam" ]
+      ++ lib.optionals (stdenv'.hostPlatform.isLinux && !stdenv'.hostPlatform.isStatic) [ "--with-pam" ]
       # This could be removed once the upstream issue is resolved:
       # https://postgr.es/m/flat/427c7c25-e8e1-4fc5-a1fb-01ceff185e5b%40technowledgy.de
       ++ lib.optionals (stdenv'.hostPlatform.isDarwin && atLeast "16") [ "LDFLAGS_EX_BE=-Wl,-export_dynamic" ];
@@ -201,7 +201,7 @@ let
         # because there is a realistic use-case for extensions to locate the /lib directory to
         # load other shared modules.
         remove-references-to -t "$dev" -t "$doc" -t "$man" "$out/bin/postgres"
-
+      '' + lib.optionalString (!stdenv'.hostPlatform.isStatic) ''
         if [ -z "''${dontDisableStatic:-}" ]; then
           # Remove static libraries in case dynamic are available.
           for i in $lib/lib/*.a; do
@@ -212,6 +212,7 @@ let
             fi
           done
         fi
+      '' + ''
         # The remaining static libraries are libpgcommon.a, libpgport.a and related.
         # Those are only used when building e.g. extensions, so go to $dev.
         moveToOutput "lib/*.a" "$dev"
@@ -229,7 +230,7 @@ let
         wrapProgram $out/bin/initdb --prefix PATH ":" ${glibc.bin}/bin
       '';
 
-    doCheck = !stdenv'.hostPlatform.isDarwin;
+    doCheck = !(stdenv'.hostPlatform.isDarwin || stdenv'.hostPlatform.isStatic);
     # autodetection doesn't seem to able to find this, but it's there.
     checkTarget = "check";