Initial liblmdb packaging (#4835)

packages/liblmdb/Makefile.patch

@@ -0,0 +1,23 @@
+diff -uNr lmdb-LMDB_0.9.24/libraries/liblmdb/Makefile lmdb-LMDB_0.9.24.mod/libraries/liblmdb/Makefile
+--- lmdb-LMDB_0.9.24/libraries/liblmdb/Makefile	2019-07-19 19:41:12.000000000 +0300
++++ lmdb-LMDB_0.9.24.mod/libraries/liblmdb/Makefile	2020-01-24 20:00:21.378688952 +0200
+@@ -18,8 +18,8 @@
+ # There may be other macros in mdb.c of interest. You should
+ # read mdb.c before changing any of them.
+ #
+-CC	= gcc
+-AR	= ar
++CC	?= gcc
++AR	?= ar
+ W	= -W -Wall -Wno-unused-parameter -Wbad-function-cast -Wuninitialized
+ THREADS = -pthread
+ OPT = -O2 -g
+@@ -27,7 +27,7 @@
+ LDLIBS	=
+ SOLIBS	=
+ SOEXT	= .so
+-prefix	= /usr/local
++prefix	?= /usr/local
+ exec_prefix = $(prefix)
+ bindir = $(exec_prefix)/bin
+ libdir = $(exec_prefix)/lib

packages/liblmdb/build.sh

@@ -0,0 +1,16 @@
+TERMUX_PKG_HOMEPAGE=https://symas.com/lmdb/
+TERMUX_PKG_DESCRIPTION="LMDB implements a simplified variant of the BerkeleyDB (BDB) API."
+TERMUX_PKG_LICENSE="OpenLDAP"
+TERMUX_PKG_VERSION=0.9.24
+TERMUX_PKG_SRCURL=https://github.com/LMDB/lmdb/archive/LMDB_0.9.24.tar.gz
+TERMUX_PKG_SHA256=44602436c52c29d4f301f55f6fd8115f945469b868348e3cddaf91ab2473ea26
+TERMUX_PKG_EXTRA_MAKE_ARGS="-C $TERMUX_PKG_SRCDIR/libraries/liblmdb"
+
+termux_step_pre_configure() {
+	CPPFLAGS+=" -DMDB_USE_ROBUST=0"
+}
+
+termux_step_install_license() {
+	install -Dm600 "$TERMUX_PKG_SRCDIR/libraries/liblmdb/LICENSE" \
+		"$TERMUX_PREFIX/share/doc/$TERMUX_PKG_NAME/LICENSE"
+}