[docs] Fix building docs if `srcdir' != `builddir'.

`docs/reference/*' was moved one directory up in commit 237fed6.

* builds/unix/unix-def.in (PIP): Remove variable.

* configure: Create `docs' directory and copy assets from
`docs/markdown'.

* docs/README: Output directory is `reference'.

ChangeLog

@@ -1,3 +1,16 @@
+2020-03-22  Nikhil Ramakrishnan  <ramakrishnan.nikhil@gmail.com>
+
+	[docs] Fix building docs if `srcdir' != `builddir'.
+
+	`docs/reference/*' was moved one directory up in commit 237fed6.
+
+	* builds/unix/unix-def.in (PIP): Remove variable.
+
+	* configure: Create `docs' directory and copy assets from
+	`docs/markdown'.
+
+	* docs/README: Output directory is `reference'.
+
 2020-03-21  Nikhil Ramakrishnan  <ramakrishnan.nikhil@gmail.com>
 
 	[docwriter] Drop support for Python < 3.5.

builds/unix/unix-def.in

@@ -24,7 +24,6 @@ SEP    := /
 # This is used for `make refdoc' and `make refdoc-venv'
 #
 PYTHON := @PYTHON@
-PIP    := @PIP@
 BIN    := bin
 
 # this is used for `make distclean' and `make install'

configure

@@ -94,10 +94,10 @@ inode_src=`ls -id $abs_ft2_dir | awk '{print $1}'`
 inode_dst=`ls -id $abs_curr_dir | awk '{print $1}'`
 
 if test $inode_src -ne $inode_dst; then
-  if test ! -d reference; then
-    mkdir reference
+  if test ! -d docs; then
+    mkdir docs
     echo "Copying documentation assets"
-    cp -R $abs_ft2_dir/docs/reference/markdown $abs_curr_dir/reference
+    cp -R $abs_ft2_dir/docs/markdown $abs_curr_dir/docs
   fi
   if test ! -r $abs_curr_dir/modules.cfg; then
     echo "Copying \`modules.cfg'"
@@ -107,7 +107,7 @@ if test $inode_src -ne $inode_dst; then
   echo "TOP_DIR        := $abs_ft2_dir"           > Makefile
   echo "OBJ_DIR        := $abs_curr_dir"         >> Makefile
   echo "OBJ_BUILD      := \$(OBJ_DIR)"           >> Makefile
-  echo "DOC_DIR        := \$(OBJ_DIR)/reference" >> Makefile
+  echo "DOC_DIR        := \$(OBJ_DIR)/docs"      >> Makefile
   echo "FT_LIBTOOL_DIR := \$(OBJ_DIR)"           >> Makefile
   echo "ifndef FT2DEMOS"                         >> Makefile
   echo "  include \$(TOP_DIR)/Makefile"          >> Makefile

docs/README

@@ -1,4 +1,4 @@
-After saying `make refdoc' or `make refdoc-venv' the `site/' directory
+After saying `make refdoc' or `make refdoc-venv' the `reference/' directory
 contains the FreeType API reference.  You need Python >= 3.5 and pip to make
 this target.