From 559d2252e87e88a5c12d2314b151c2899081db32 Mon Sep 17 00:00:00 2001
From: "William A. Kennington III" <william@wkennington.com>
Date: Sat, 1 Aug 2015 19:08:31 -0700
Subject: [PATCH] sqlite: Add feature flags, mostly taken from the gentoo
 ebuild

---
 pkgs/development/libraries/sqlite/default.nix | 35 +++++++++++++++++--
 1 file changed, 33 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/libraries/sqlite/default.nix b/pkgs/development/libraries/sqlite/default.nix
index d4f1d6bcee0..f043a37033a 100644
--- a/pkgs/development/libraries/sqlite/default.nix
+++ b/pkgs/development/libraries/sqlite/default.nix
@@ -12,9 +12,40 @@ stdenv.mkDerivation {
 
   buildInputs = lib.optionals interactive [ readline ncurses ];
 
-  configureFlags = "--enable-threadsafe";
+  configureFlags = [ "--enable-threadsafe" ];
 
-  NIX_CFLAGS_COMPILE = "-DSQLITE_ENABLE_COLUMN_METADATA=1 -DSQLITE_SECURE_DELETE=1 -DSQLITE_ENABLE_UNLOCK_NOTIFY=1";
+  NIX_CFLAGS_COMPILE = [
+    "-DSQLITE_ENABLE_COLUMN_METADATA"
+    "-DSQLITE_ENABLE_DBSTAT_VTAB"
+    "-DSQLITE_ENABLE_FTS3"
+    "-DSQLITE_ENABLE_FTS3_PARENTHESIS"
+    "-DSQLITE_ENABLE_FTS4"
+    "-DSQLITE_ENABLE_RTREE"
+    "-DSQLITE_ENABLE_STMT_SCANSTATUS"
+    "-DSQLITE_ENABLE_UNLOCK_NOTIFY"
+    "-DSQLITE_SOUNDEX"
+    "-DSQLITE_SECURE_DELETE"
+  ];
+
+  # Test for features which may not be available at compile time
+  preBuild = ''
+    # Use pread(), pread64(), pwrite(), pwrite64() functions for better performance if they are available.
+    if cc -Werror=implicit-function-declaration -x c - -o "$TMPDIR/pread_pwrite_test" <<< \
+      ''$'#include <unistd.h>\nint main()\n{\n  pread(0, NULL, 0, 0);\n  pwrite(0, NULL, 0, 0);\n  return 0;\n}'; then
+      export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -DUSE_PREAD"
+    fi
+    if cc -Werror=implicit-function-declaration -x c - -o "$TMPDIR/pread64_pwrite64_test" <<< \
+      ''$'#include <unistd.h>\nint main()\n{\n  pread64(0, NULL, 0, 0);\n  pwrite64(0, NULL, 0, 0);\n  return 0;\n}'; then
+      export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -DUSE_PREAD64"
+    elif cc -D_LARGEFILE64_SOURCE -Werror=implicit-function-declaration -x c - -o "$TMPDIR/pread64_pwrite64_test" <<< \
+      ''$'#include <unistd.h>\nint main()\n{\n  pread64(0, NULL, 0, 0);\n  pwrite64(0, NULL, 0, 0);\n  return 0;\n}'; then
+      export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -DUSE_PREAD64 -D_LARGEFILE64_SOURCE"
+    fi
+
+    echo ""
+    echo "NIX_CFLAGS_COMPILE = $NIX_CFLAGS_COMPILE"
+    echo ""
+  '';
 
   meta = {
     homepage = http://www.sqlite.org/;