add pkg-config and use it in cgo - WitzHsiao

src/CMakeLists.txt

@@ -43,6 +43,10 @@ if ( NOT DEFINED WITH_BINDING_PYTHON )
   SET(WITH_BINDING_PYTHON ON)
 ENDIF()
 
+if ( NOT DEFINED WITH_BINDING_GO )
+  SET(WITH_BINDING_GO ON)
+ENDIF()
+
 if ( NOT DEFINED WITH_UTILITIES )
   SET(WITH_UTILITIES ON)
 ENDIF()
@@ -175,6 +179,12 @@ if (WITH_BINDING_PYTHON)
 add_subdirectory(bindings/python)
 ENDIF()
 
+if (WITH_BINDING_GO)
+    set(OPENALPR_LIB_GO openalprgo)
+    set(TAG_OPENALPR_LIB_GO "-l${OPENALPR_LIB_GO}")
+    add_subdirectory(bindings/go)
+ENDIF()
+
 if (NOT IOS)
   install (TARGETS    alpr DESTINATION   ${CMAKE_INSTALL_PREFIX}/bin)
   install (FILES      ${CMAKE_SOURCE_DIR}/../doc/man/alpr.1 DESTINATION       ${CMAKE_INSTALL_PREFIX}/share/man/man1 COMPONENT doc)

src/bindings/go/CMakeLists.txt

@@ -0,0 +1,28 @@
+cmake_minimum_required (VERSION 2.6)
+
+set(go_source_files
+  openalprgo.cpp
+)
+
+add_library(openalprgo SHARED ${go_source_files})
+
+set_target_properties(openalprgo PROPERTIES SOVERSION ${OPENALPR_MAJOR_VERSION})
+
+TARGET_LINK_LIBRARIES(openalprgo openalpr)
+
+if (NOT WIN32)
+    #generate the .pc file
+    SET(prefix "${CMAKE_INSTALL_PREFIX}")
+    SET(exec_prefix "\${prefix}")
+    SET(libdir "\${exec_prefix}/lib")
+    SET(includedir "\${exec_prefix}/include")
+    SET(VERSION "${OPENALPR_VERSION}")
+    CONFIGURE_FILE(
+      "${CMAKE_MODULE_PATH}/templates/openalpr.pc.in"
+      "${CMAKE_CURRENT_BINARY_DIR}/pkgconfig/openalpr.pc"
+      @ONLY)
+    install (FILES "${CMAKE_CURRENT_BINARY_DIR}/pkgconfig/openalpr.pc" DESTINATION "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig")
+ENDIF()
+
+install (TARGETS    openalprgo       DESTINATION     ${CMAKE_INSTALL_PREFIX}/lib)
+install (FILES    openalprgo.h     DESTINATION     ${CMAKE_INSTALL_PREFIX}/include)

src/bindings/go/openalpr/openalpr.go

@@ -1,8 +1,7 @@
 package openalpr
 
 /*
-#cgo CFLAGS: -I${SRCDIR}/..
-#cgo LDFLAGS: -L${SRCDIR}/.. -lopenalprgo
+#cgo pkg-config: openalpr
 #include <openalprgo.h>
 #include <stdlib.h>
 */

src/cmake_modules/templates/openalpr.pc.in

@@ -0,0 +1,10 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: OpenALPR
+Description: Open source Automatic License Plate Recognition library
+Version: @VERSION@
+Libs: -L${libdir} -lopenalpr @TAG_OPENALPR_LIB_GO@
+Cflags: -I${includedir}