Parts of http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1179

Frederic Heem:
* More cmake system checks. It compiles dumpcap without running configure,

svn path=/trunk/; revision=19672

1 files changed, 137 insertions, 0 deletions

diff --git a/cmake/modules/UsePkgConfig.cmake b/cmake/modules/UsePkgConfig.cmake
new file mode 100644
index 0000000000..9a15015e07
--- /dev/null
+++ b/cmake/modules/UsePkgConfig.cmake
@@ -0,0 +1,137 @@
+# - pkg-config module for CMake
+#
+# Defines the following macros:
+#
+#  PKGCONFIG_FOUND(package found)
+#  PKGCONFIG(package includedir libdir linkflags cflags)
+#  PKGCONFIG_VERSION(package version)
+#  PKGCONFIG_DEFINITION(package definition)
+
+# Calling PKGCONFIG_FOUND will fill into the argument the value of the package search's result
+# e.g. PKGCONFIG_FOUND(libart-2.0 LIBART_FOUND)
+#
+# Calling PKGCONFIG_VERSION will fill the desired version into the argument,
+# e.g. PKGCONFIG_VERSION(libart-2.0 LIBART_VERSION)
+# Calling PKGCONFIG will fill the desired information into the 4 given arguments,
+# e.g. PKGCONFIG(libart-2.0 LIBART_INCLUDE_DIR LIBART_LINK_DIR LIBART_LINK_FLAGS LIBART_CFLAGS)
+# if pkg-config was NOT found or the specified software package doesn't exist, the
+# variable will be empty when the function returns, otherwise they will contain the respective information
+#
+# Calling PKGCONFIG_VERSION will fill the desired version into the argument,
+# e.g. PKGCONFIG_VERSION(libart-2.0 LIBART_VERSION)
+#
+# Calling PKGCONFIG_DEFINITION will fill the definition (e.g -D_REENTRANT) into the argument,
+# e.g. PKGCONFIG_DEFINITION(libart-2.0 LIBART_DEFINITION)
+
+FIND_PROGRAM(PKGCONFIG_EXECUTABLE NAMES pkg-config PATHS /usr/local/bin )
+
+MACRO(PKGCONFIG _package _include_DIR _link_DIR _link_FLAGS _cflags)
+# reset the variables at the beginning
+  SET(${_include_DIR})
+  SET(${_link_DIR})
+  SET(${_link_FLAGS})
+  SET(${_cflags})
+
+# if pkg-config has been found
+  IF(PKGCONFIG_EXECUTABLE)
+
+    EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --exists RETURN_VALUE _return_VALUE OUTPUT_VARIABLE _pkgconfigDevNull )
+
+# and if the package of interest also exists for pkg-config, then get the information
+    IF(NOT _return_VALUE)
+
+      EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --variable=includedir OUTPUT_VARIABLE ${_include_DIR} )
+
+      EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --variable=libdir OUTPUT_VARIABLE ${_link_DIR} )
+
+      EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --libs OUTPUT_VARIABLE ${_link_FLAGS} )
+
+      EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --cflags OUTPUT_VARIABLE ${_cflags} )
+
+    ENDIF(NOT _return_VALUE)
+
+  ENDIF(PKGCONFIG_EXECUTABLE)
+
+ENDMACRO(PKGCONFIG _include_DIR _link_DIR _link_FLAGS _cflags)
+
+
+
+MACRO(PKGCONFIG_FOUND _package _pkgpath _found)
+  # reset the variable at the beginning
+  SET(${_found})
+
+# if pkg-config has been found
+  IF(PKGCONFIG_EXECUTABLE)
+    SET(ENV{PKG_CONFIG_PATH} ${_pkgpath})
+    EXECUTE_PROCESS(COMMAND ${PKGCONFIG_EXECUTABLE} --print-errors --exists ${_package} RESULT_VARIABLE _return_VALUE OUTPUT_VARIABLE _pkgconfigDevNull )
+    
+    IF(${_pkgconfigDevNull})
+      MESSAGE(STATUS "${_pkgconfigDevNull}")
+    ENDIF(${_pkgconfigDevNull})
+    
+    IF(NOT _return_VALUE)
+      SET(${_found} "TRUE")
+    ENDIF(NOT _return_VALUE)
+  ENDIF(PKGCONFIG_EXECUTABLE)
+
+ENDMACRO(PKGCONFIG_FOUND _package _pkgpath _found)
+
+
+#TODO: doesn't work when pkgconfig returns multiples inlude path
+MACRO(PKGCONFIG_INCLUDE_DIRS _package _pkgpath _include_dirs)
+# reset the variable at the beginning
+  SET(${_include_dirs})
+  IF(PKGCONFIG_EXECUTABLE)
+    SET(ENV{PKG_CONFIG_PATH} ${_pkgpath})
+    EXECUTE_PROCESS(COMMAND ${PKGCONFIG_EXECUTABLE} --cflags-only-I ${_package} OUTPUT_VARIABLE include)
+    STRING(REGEX REPLACE "-I/" "/" _include_dirs_temp ${include})
+    STRING(REGEX REPLACE "[\n\r]" "" ${_include_dirs} ${_include_dirs_temp})
+    #When the include directory is /usr/include, pkgconfig returns a space and a new line
+    IF("${_include_dirs}" STREQUAL " ")
+      SET(${_include_dirs} "/usr/include")
+    ENDIF("${_include_dirs}" STREQUAL " ")
+  ENDIF(PKGCONFIG_EXECUTABLE)
+ENDMACRO(PKGCONFIG_INCLUDE_DIRS _package _pkgpath _include_dirs)
+
+MACRO(PKGCONFIG_LIBRARY_DIR _package _pkgpath _library_dir)
+# reset the variable at the beginning
+  SET(${_library_dir})
+  IF(PKGCONFIG_EXECUTABLE)
+    SET(ENV{PKG_CONFIG_PATH} ${_pkgpath})
+    EXECUTE_PROCESS(COMMAND ${PKGCONFIG_EXECUTABLE} --libs-only-L ${_package} OUTPUT_VARIABLE libraries)
+    STRING(REGEX REPLACE "-L/" "/" _library_dirs_temp ${libraries})
+    MESSAGE(STATUS "lib dir ${_library_dirs_temp} end")
+    STRING(REGEX REPLACE "[\r\n]" "" ${_library_dir} ${_library_dirs_temp})
+    #When the library directory is /usr/lib, pkgconfig returns an empty stringand a new line
+    IF("${_library_dir}" STREQUAL " ")
+      SET(${_library_dir} "/usr/lib")
+    ENDIF("${_library_dir}" STREQUAL " ")
+    MESSAGE(STATUS "lib dir ${${_library_dir}} end")
+  ENDIF(PKGCONFIG_EXECUTABLE)
+ENDMACRO(PKGCONFIG_LIBRARY_DIR _package _pkgpath _library_dir)
+
+MACRO(PKGCONFIG_VERSION _package _pkgpath _version)
+# reset the variable at the beginning
+  SET(${_version})
+
+  IF(PKGCONFIG_EXECUTABLE)
+    SET(ENV{PKG_CONFIG_PATH} ${_pkgpath})
+    EXECUTE_PROCESS(COMMAND ${PKGCONFIG_EXECUTABLE} --modversion ${_package} OUTPUT_VARIABLE version)
+    STRING(REGEX REPLACE "[\n\r]" "" ${_version} ${version})
+  ENDIF(PKGCONFIG_EXECUTABLE)
+
+ENDMACRO(PKGCONFIG_VERSION _package _pkgpath _version)
+
+MACRO(PKGCONFIG_DEFINITION _package _pkgpath _definition)
+# reset the variable at the beginning
+  SET(${_definition})
+
+  IF(PKGCONFIG_EXECUTABLE)
+    SET(ENV{PKG_CONFIG_PATH} ${_pkgpath})
+    EXECUTE_PROCESS(COMMAND ${PKGCONFIG_EXECUTABLE} --cflags-only-other ${_package} OUTPUT_VARIABLE definition)
+    STRING(REGEX REPLACE "[\n\r]" "" ${_definition} ${definition})
+  ENDIF(PKGCONFIG_EXECUTABLE)
+
+ENDMACRO(PKGCONFIG_DEFINITION _package _pkgpath _definition)
+
+MARK_AS_ADVANCED(PKGCONFIG_EXECUTABLE)