build: use -ffunction-sections and --gc-sections

[oweals/jsonpath.git] / CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9b2fd506df43570959bf44a79616f8814051d7a1..ef1a089ab796a7aae85d4dc7eb5bc9c5f9dbd2cb 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,9 +1,9 @@
 cmake_minimum_required(VERSION 2.6)
 
 PROJECT(jsonpath C)
-ADD_DEFINITIONS(-Os -Wall -Werror --std=gnu99 -Wmissing-declarations)
+ADD_DEFINITIONS(-Os -Wall -Werror --std=gnu99 -Wmissing-declarations -ffunction-sections)
 
-SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
+SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "-Wl,--gc-sections")
 
 IF(APPLE)
   INCLUDE_DIRECTORIES(/opt/local/include)
@@ -27,6 +27,7 @@ FIND_PACKAGE(BISON REQUIRED)
 IF(BISON_FOUND)
     ADD_CUSTOM_COMMAND(
       OUTPUT parser.c
+      DEPENDS parser.y
       COMMAND ${BISON_EXECUTABLE} parser.y
       COMMENT "Generating parser.c"
     )
@@ -36,11 +37,14 @@ FIND_PACKAGE(FLEX REQUIRED)
 IF(FLEX_FOUND)
     ADD_CUSTOM_COMMAND(
       OUTPUT lexer.c
+      DEPENDS lexer.l
       COMMAND ${FLEX_EXECUTABLE} lexer.l
       COMMENT "Generating lexer.c"
     )
 ENDIF()
 
+SET_PROPERTY(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES "lexer.h;parser.h")
+SET_SOURCE_FILES_PROPERTIES("lexer.c;parser.c" PROPERTIES GENERATED TRUE)
 ADD_EXECUTABLE(jsonpath main.c lexer.c parser.c matcher.c)
 TARGET_LINK_LIBRARIES(jsonpath ubox ${json})