move all public headers to include/nng/ folder

This change makes embedding nng + nggpp (or other projects depending on
nng) in cmake easier.  The header files are moved to a separate include
directory.  This also makes installation of the headers easier, and
allows clearer identification of private vs public heade files.

Some additional cleanups were performed by @gedamore, but the main
credit for this change belongs with @gregorburger.

1 files changed, 4 insertions, 6 deletions

diff --git a/src/protocol/survey0/CMakeLists.txt b/src/protocol/survey0/CMakeLists.txt
index b6104a54..260c3e58 100644
--- a/src/protocol/survey0/CMakeLists.txt
+++ b/src/protocol/survey0/CMakeLists.txt
@@ -16,25 +16,23 @@ option (NNG_PROTO_SURVEYOR0 "Enable SURVEYORv0 protocol." ON)
 mark_as_advanced(NNG_PROTO_SURVEYOR0)
 
 set(_DEFS)
-set(_HDRS)
 set(_SRCS)
 
 if (NNG_PROTO_SURVEYOR0)
     list(APPEND _DEFS -DNNG_HAVE_SURVEYOR0)
     list(APPEND _SRCS
         protocol/survey0/survey.c protocol/survey0/xsurvey.c
-        protocol/survey0/survey.h)
-    list(APPEND _HDRS protocol/survey0/survey.h)
+        ${PROJECT_SOURCE_DIR}/include/nng/protocol/survey0/survey.h)
+   
 endif()
 
 if (NNG_PROTO_RESPONDENT0)
     list(APPEND _DEFS -DNNG_HAVE_RESPONDENT0)
     list(APPEND _SRCS
         protocol/survey0/respond.c protocol/survey0/xrespond.c
-        protocol/survey0/respond.h)
-    list(APPEND _HDRS protocol/survey0/respond.h)
+        ${PROJECT_SOURCE_DIR}/include/nng/protocol/survey0/respond.h)
+   
 endif()
 
 set(NNG_DEFS ${NNG_DEFS} ${_DEFS} PARENT_SCOPE)
 set(NNG_SRCS ${NNG_SRCS} ${_SRCS} PARENT_SCOPE)
-set(NNG_HDRS ${NNG_HDRS} ${_HDRS} PARENT_SCOPE)