feat: Build against libpq 15

Signed-off-by: Wolfgang Walther <walther@technowledgy.de>
Co-authored-by: Wolfgang Walther <walther@technowledgy.de>

default.nix

@@ -37,7 +37,7 @@ let
       allOverlays.checked-shell-script
       allOverlays.gitignore
       allOverlays.postgis
-      allOverlays.postgresql-default
+      (allOverlays.postgresql-default { inherit patches; })
       allOverlays.postgresql-legacy
       allOverlays.postgresql-future
       (allOverlays.haskell-packages { inherit compiler; })

nix/overlays/postgresql-default.nix

@@ -1,5 +1,8 @@
-self: super:
+{ patches }: self: super:
 # Overlay that sets the default version of PostgreSQL.
+with patches;
 {
-  postgresql = super.postgresql_14;
+  postgresql = super.postgresql_15.overrideAttrs ({ patches ? [ ], ... }: {
+    patches = patches ++ [ postgresql-atexit ];
+  });
 }

nix/patches/default.nix

@@ -24,4 +24,6 @@
     ./static-haskell-nix-ghc-bignum.patch;
   static-haskell-nix-openssl =
     ./static-haskell-nix-openssl.patch;
+  postgresql-atexit =
+    ./postgresql-atexit.patch;
 }

nix/patches/postgresql-atexit.patch

@@ -0,0 +1,11 @@
+--- a/src/interfaces/libpq/Makefile
++++ b/src/interfaces/libpq/Makefile
+@@ -118,7 +118,7 @@ backend_src = $(top_srcdir)/src/backend
+ libpq-refs-stamp: $(shlib)
+ ifneq ($(enable_coverage), yes)
+ ifeq (,$(filter aix solaris,$(PORTNAME)))
+-	@if nm -A -u $< 2>/dev/null | grep -v __cxa_atexit | grep exit; then \
++	@if nm -A -u $< 2>/dev/null | grep " exit"; then \
+ 		echo 'libpq must not be calling any function which invokes exit'; exit 1; \
+ 	fi
+ endif

nix/static-haskell-package.nix

@@ -35,7 +35,7 @@ let
   overlays =
     [
       allOverlays.postgresql-future
-      allOverlays.postgresql-default
+      (allOverlays.postgresql-default { inherit patches; })
       (allOverlays.haskell-packages { inherit compiler extraOverrides; })
       # Disable failing tests for postgresql on musl that should have no impact
       # on the libpq that we need (collate.icu.utf8 and foreign regression