Preserve doc folders structure on package install

Issue #518 (bdwgc).

Previously all documentation files were copied to a single folder
during make install.  Now, the files are copied preserving the
directories structure.

* CMakeLists.txt [enable_docs] (install): Change destination for
doc/README.* and doc/*.md items from ${CMAKE_INSTALL_DOCDIR} to
${CMAKE_INSTALL_DOCDIR}/doc; change destination for
doc/platforms/README.* items from ${CMAKE_INSTALL_DOCDIR} to
${CMAKE_INSTALL_DOCDIR}/doc/platforms.
* Makefile.am [ENABLE_DOCS] (docdocdir, docdocplatformsdir): New
variable.
* Makefile.am [ENABLE_DOCS] (dist_docdoc_DATA): Define (move
doc/README.* and doc/*.md items from dist_doc_DATA).
* Makefile.am [ENABLE_DOCS] (dist_docdocplatforms_DATA): Define (move
doc/platforms/README.* items from dist_doc_DATA).

1 files changed, 24 insertions, 18 deletions

diff --git a/Makefile.am b/Makefile.am
index 11159ec0..8f81f953 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -216,24 +216,10 @@ dist_doc_DATA = \
     AUTHORS \
     ChangeLog \
     LICENSE \
-    README.md \
-    doc/platforms/README.aix \
-    doc/platforms/README.amiga \
-    doc/platforms/README.arm_cross \
-    doc/platforms/README.darwin \
-    doc/platforms/README.dgux386 \
-    doc/platforms/README.emscripten \
-    doc/platforms/README.ews4800 \
-    doc/platforms/README.hp \
-    doc/platforms/README.linux \
-    doc/platforms/README.mac \
-    doc/platforms/README.os2 \
-    doc/platforms/README.sgi \
-    doc/platforms/README.solaris2 \
-    doc/platforms/README.symbian \
-    doc/platforms/README.uts \
-    doc/platforms/README.win32 \
-    doc/platforms/README.win64 \
+    README.md
+
+docdocdir = $(docdir)/doc
+dist_docdoc_DATA = \
     doc/README.autoconf \
     doc/README.cmake \
     doc/README.cords \
@@ -251,6 +237,26 @@ dist_doc_DATA = \
     doc/simple_example.md \
     doc/tree.md
 
+docdocplatformsdir = $(docdocdir)/platforms
+dist_docdocplatforms_DATA = \
+    doc/platforms/README.aix \
+    doc/platforms/README.amiga \
+    doc/platforms/README.arm_cross \
+    doc/platforms/README.darwin \
+    doc/platforms/README.dgux386 \
+    doc/platforms/README.emscripten \
+    doc/platforms/README.ews4800 \
+    doc/platforms/README.hp \
+    doc/platforms/README.linux \
+    doc/platforms/README.mac \
+    doc/platforms/README.os2 \
+    doc/platforms/README.sgi \
+    doc/platforms/README.solaris2 \
+    doc/platforms/README.symbian \
+    doc/platforms/README.uts \
+    doc/platforms/README.win32 \
+    doc/platforms/README.win64
+
 dist_man3_MANS = gc.man
 endif