autotools: install CMake package config files

.gitignore

@@ -56,6 +56,7 @@
 /c++/build-aux/
 /c++/capnp
 /c++/capnp-evolution-test
+/c++/cmake/CapnProtoConfig.cmake
 /c++/pkgconfig/*.pc
 /c++/capnp-test
 /c++/capnpc-c++

c++/Makefile.am

@@ -33,8 +33,6 @@ EXTRA_DIST =                                                                 \
   src/capnp/testdata/packedflat                                              \
   CMakeLists.txt                                                             \
   cmake/FindCapnProto.cmake                                                  \
-  cmake/CapnProtoConfig.cmake.in                                             \
-  cmake/CapnProtoMacros.cmake                                                \
   src/CMakeLists.txt                                                         \
   src/kj/CMakeLists.txt                                                      \
   src/capnp/CMakeLists.txt
@@ -116,6 +114,9 @@ dist_includecapnp_DATA = $(public_capnpc_inputs)
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = $(CAPNP_PKG_CONFIG_FILES)
 
+cmakeconfigdir = $(libdir)/cmake/CapnProto
+cmakeconfig_DATA = $(CAPNP_CMAKE_CONFIG_FILES) cmake/CapnProtoMacros.cmake
+
 noinst_HEADERS = \
   src/kj/miniposix.h
 

c++/configure.ac

@@ -114,7 +114,20 @@ AC_DEFUN([CAPNP_PKG_CONFIG_FILES], [ \
   pkgconfig/kj-http.pc \
   pkgconfig/kj-test.pc \
 ])
+AC_DEFUN([CAPNP_CMAKE_CONFIG_FILES], [ \
+  cmake/CapnProtoConfig.cmake \
+])
+
 [CAPNP_PKG_CONFIG_FILES]="CAPNP_PKG_CONFIG_FILES"
+[CAPNP_CMAKE_CONFIG_FILES]="CAPNP_CMAKE_CONFIG_FILES"
 AC_SUBST([CAPNP_PKG_CONFIG_FILES])
-AC_CONFIG_FILES([Makefile] CAPNP_PKG_CONFIG_FILES)
+AC_SUBST([CAPNP_CMAKE_CONFIG_FILES])
+
+# CapnProtoConfig.cmake.in needs these PACKAGE_* output variables.
+PACKAGE_INIT="set([CAPNP_PKG_CONFIG_FILES] CAPNP_PKG_CONFIG_FILES)"
+PACKAGE_CMAKE_INSTALL_FULL_INCLUDEDIR="${CMAKE_CURRENT_LIST_DIR}/../../include"
+AC_SUBST([PACKAGE_INIT])
+AC_SUBST([PACKAGE_CMAKE_INSTALL_FULL_INCLUDEDIR])
+
+AC_CONFIG_FILES([Makefile] CAPNP_PKG_CONFIG_FILES CAPNP_CMAKE_CONFIG_FILES)
 AC_OUTPUT