Problem: examples/chat is not built

Solution: fix autoconf and CMake with local project-specific targets
to build it again

CMakeLists.txt

@@ -166,6 +166,8 @@ install(TARGETS zyre
     RUNTIME DESTINATION bin              # .dll file
 )
 
+include(${CMAKE_CURRENT_SOURCE_DIR}/src/CMakeLists-local.txt) # Optional project-local hook
+
 ########################################################################
 # pkgconfig
 ########################################################################

Makefile.am

@@ -30,6 +30,7 @@ if ENABLE_DIST_CMAKEFILES
 EXTRA_DIST += \
     Findlibzmq.cmake \
     Findczmq.cmake \
+    src/CMakeLists-local.txt \
     CMakeLists.txt
 endif
 
@@ -45,6 +46,7 @@ EXTRA_DIST += \
     src/zyre_classes.h
 
 include $(srcdir)/src/Makemodule.am
+include $(srcdir)/src/Makemodule-local.am # Optional project-local hook
 
 ################################################################################
 #  THIS FILE IS 100% GENERATED BY ZPROJECT; DO NOT EDIT EXCEPT EXPERIMENTALLY  #

acinclude.m4

@@ -0,0 +1,10 @@
+AC_DEFUN([AX_PROJECT_LOCAL_HOOK], [
+    # Check for examples/chat intent
+    AC_ARG_ENABLE([examples_chat],
+        AS_HELP_STRING([--enable-examples-chat],
+            [Compile 'chat' in examples/chat [default=no]]),
+        [enable_examples_chat=$enableval],
+        [enable_examples_chat=no])
+    AM_CONDITIONAL([ENABLE_EXAMPLES_CHAT], [test x$enable_examples_chat != xno])
+    AM_COND_IF([ENABLE_EXAMPLES_CHAT], [AC_MSG_NOTICE([ENABLE_EXAMPLES_CHAT defined])])
+])

configure.ac

@@ -52,6 +52,9 @@ AC_PROG_SED
 AC_PROG_AWK
 PKG_PROG_PKG_CONFIG
 
+# Optional project-local hook (acinclude.m4, add AC_DEFUN([AX_PROJECT_LOCAL_HOOK], [whatever]) )
+AX_PROJECT_LOCAL_HOOK
+
 # Code coverage
 AC_ARG_WITH(gcov, [AS_HELP_STRING([--with-gcov=yes/no],
                   [With GCC Code Coverage reporting])],

src/CMakeLists-local.txt

@@ -0,0 +1,15 @@
+add_executable(
+    chat
+    "${SOURCE_DIR}/examples/chat/chat.c"
+)
+target_link_libraries(
+    chat
+    zyre
+    ${LIBZMQ_LIBRARIES}
+    ${CZMQ_LIBRARIES}
+    ${OPTIONAL_LIBRARIES}
+)
+set_target_properties(
+    chat
+    PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${SOURCE_DIR}/examples/chat"
+)

src/Makemodule-local.am

@@ -0,0 +1,10 @@
+# Project-local changes to auto-generated content
+
+if ENABLE_EXAMPLES_CHAT
+EXTRA_DIST += examples/LICENSE
+
+noinst_PROGRAMS += examples/chat/chat
+examples_chat_chat_SOURCES = examples/chat/chat.c
+examples_chat_chat_CPPFLAGS = ${AM_CPPFLAGS}
+examples_chat_chat_LDADD = ${program_libs}
+endif #ENABLE_EXAMPLES_CHAT