linux: build Berkeley DB

It has more favorable licensing terms than GDBM, which is
GPLv3.

Author: indygreg

cpython-linux/Makefile

@@ -31,6 +31,9 @@ $(OUTDIR)/gcc-linux64.tar: $(OUTDIR)/binutils-linux64.tar $(HERE)/build-gcc.sh
 $(OUTDIR)/clang-linux64.tar: $(OUTDIR)/binutils-linux64.tar $(OUTDIR)/gcc-linux64.tar $(OUTDIR)/image-clang.tar $(HERE)/build-clang.sh
 	$(BUILD) clang
 
+$(OUTDIR)/bdb-%.tar: $(OUTDIR)/image-build.tar $(TOOLCHAIN_DEPENDS) $(HERE)/build-bdb.sh
+	$(BUILD) --platform $* bdb
+
 $(OUTDIR)/bzip2-%.tar: $(OUTDIR)/image-build.tar $(TOOLCHAIN_DEPENDS) $(HERE)/build-bzip2.sh
 	$(BUILD) --platform $* bzip2
 
@@ -68,6 +71,7 @@ $(OUTDIR)/zlib-$(PLATFORM).tar: $(TOOLCHAIN_DEPENDS) $(HERE)/build-zlib.sh
 	$(BUILD) --platform $(PLATFORM) zlib
 
 PYTHON_DEPENDS := \
+    $(OUTDIR)/bdb-$(PLATFORM).tar \
     $(OUTDIR)/bzip2-$(PLATFORM).tar \
     $(OUTDIR)/gdbm-$(PLATFORM).tar \
     $(OUTDIR)/libedit-$(PLATFORM).tar \

cpython-linux/build-bdb.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+set -ex
+
+cd /build
+
+export PATH=/tools/${TOOLCHAIN}/bin:/tools/host/bin:$PATH
+export CC=clang
+export CXX=clang++
+
+tar -xf db-${BDB_VERSION}.tar.gz
+
+pushd db-${BDB_VERSION}/build_unix
+
+CLFAGS="${EXTRA_TARGET_CFLAGS} -fPIC" CPPFLAGS="${EXTRA_TARGET_CFLAGS} -fPIC" ../dist/configure \
+    --build=x86_64-unknown-linux-gnu \
+    --target=${TARGET} \
+    --prefix=/tools/deps \
+    --enable-dbm
+
+make -j `nproc`
+make -j `nproc` install DESTDIR=/build/out

cpython-linux/build.py

@@ -669,7 +669,7 @@ def main():
         elif action == 'readline':
             build_readline(client, get_image(client, 'build'), platform=args.platform)
 
-        elif action in ('bzip2', 'gdbm', 'libffi', 'ncurses', 'openssl', 'sqlite', 'uuid', 'xz', 'zlib'):
+        elif action in ('bdb', 'bzip2', 'gdbm', 'libffi', 'ncurses', 'openssl', 'sqlite', 'uuid', 'xz', 'zlib'):
             simple_build(client, get_image(client, 'build'), action, platform=args.platform)
 
         elif action == 'tcltk':