pypy{27,310,311}: make CFFI builds find libsqlite3

pkgs/development/interpreters/python/pypy/default.nix

@@ -140,8 +140,22 @@ stdenv.mkDerivation rec {
       tcl_libprefix = tcl.libPrefix;
     })
 
-    (replaceVars ./sqlite_paths.patch {
+    # Python ctypes.util uses three different strategies to find a library (on Linux):
+    # 1. /sbin/ldconfig
+    # 2. cc -Wl,-t -l"$libname"; objdump -p
+    # 3. ld -t (where it attaches the values in $LD_LIBRARY_PATH as -L arguments)
+    # The first is disabled in Nix (and wouldn't work in the build sandbox or on NixOS anyway), and
+    # the third was only introduced in Python 3.6 (see bugs.python.org/issue9998), so is not
+    # available when buliding PyPy (which is built using Python/PyPy 2.7).
+    # The second requires SONAME to be set for the dynamic library for the second part not to fail.
+    # As libsqlite3 stopped shipping with SONAME after the switch to autosetup (>= 3.50 in Nixpkgs;
+    # see https://www.sqlite.org/src/forumpost/5a3b44f510df8ded). This makes the Python CFFI module
+    # unable to find the SQLite library.
+    # To circumvent these issues, we hardcode the path during build.
+    # For more information, see https://github.com/NixOS/nixpkgs/issues/419942.
+    (replaceVars (if isPy3k then ./sqlite_paths.patch else ./sqlite_paths_2_7.patch) {
       inherit (sqlite) out dev;
+      libsqlite = "${sqlite.out}/lib/libsqlite3${stdenv.hostPlatform.extensions.sharedLibrary}";
     })
   ];
 

pkgs/development/interpreters/python/pypy/sqlite_paths.patch

@@ -1,7 +1,35 @@
-diff -ur a/lib_pypy/_sqlite3_build.py b/lib_pypy/_sqlite3_build.py
---- a/lib_pypy/_sqlite3_build.py	2021-04-12 01:11:48.000000000 -0400
-+++ b/lib_pypy/_sqlite3_build.py	2021-07-14 18:08:33.000000000 -0400
-@@ -301,6 +301,8 @@
+diff --git a/lib_pypy/_sqlite3_build.py b/lib_pypy/_sqlite3_build.py
+index 2a4e573..92ab786 100644
+--- a/lib_pypy/_sqlite3_build.py
++++ b/lib_pypy/_sqlite3_build.py
+@@ -352,7 +352,7 @@ def _has_load_extension():
+     typedef ... sqlite3;
+     int sqlite3_enable_load_extension(sqlite3 *db, int onoff);
+     """)
+-    libname = 'sqlite3'
++    libname = '@libsqlite@'
+     if sys.platform == 'win32':
+         import os
+         _libname = os.path.join(os.path.dirname(sys.executable), libname)
+@@ -369,7 +369,7 @@ def _has_backup():
+     typedef ... sqlite3_backup;
+     sqlite3_backup* sqlite3_backup_init(sqlite3 *, const char* , sqlite3 *, const char*);
+     """)
+-    libname = 'sqlite3'
++    libname = '@libsqlite@'
+     if sys.platform == 'win32':
+         import os
+         _libname = os.path.join(os.path.dirname(sys.executable), libname)
+@@ -383,7 +383,7 @@ def _get_version():
+     unverified_ffi.cdef("""
+     int sqlite3_libversion_number(void);
+     """)
+-    libname = 'sqlite3'
++    libname = '@libsqlite@'
+     if sys.platform == 'win32':
+         import os
+         _libname = os.path.join(os.path.dirname(sys.executable), libname)
+@@ -554,6 +554,8 @@ if sys.platform.startswith('freebsd'):
  else:
      extra_args = dict(
          libraries=libraries,

pkgs/development/interpreters/python/pypy/sqlite_paths_2_7.patch

@@ -0,0 +1,22 @@
+diff --git a/lib_pypy/_sqlite3_build.py b/lib_pypy/_sqlite3_build.py
+index fb03aee..b3b5f39 100644
+--- a/lib_pypy/_sqlite3_build.py
++++ b/lib_pypy/_sqlite3_build.py
+@@ -234,7 +234,7 @@ def _has_load_extension():
+     typedef ... sqlite3;
+     int sqlite3_enable_load_extension(sqlite3 *db, int onoff);
+     """)
+-    libname = 'sqlite3'
++    libname = '@libsqlite@'
+     if sys.platform == 'win32':
+         import os
+         _libname = os.path.join(os.path.dirname(sys.executable), libname)
+@@ -257,6 +257,8 @@ if sys.platform.startswith('freebsd'):
+ else:
+     extra_args = dict(
+         libraries=libraries,
++        include_dirs=['@dev@/include'],
++        library_dirs=['@out@/lib']
+     )
+ 
+ _ffi.set_source("_sqlite3_cffi", "#include <sqlite3.h>", **extra_args)