Fix:build:Implemented conditional building, dependent on modules/libs

presence


git-svn-id: http://svn.code.sf.net/p/navit/code/trunk/navit@3712 ffa7fe5e-494d-0410-b361-a75ebd5db220

3 files changed, 142 insertions, 4 deletions

diff --git a/cmake/FindGlib.cmake b/cmake/FindGlib.cmake
new file mode 100644
index 000000000..d3547d51d
--- /dev/null
+++ b/cmake/FindGlib.cmake
@@ -0,0 +1,39 @@
+# - Try to find Glib-2.0 (with gobject)
+# Once done, this will define
+#
+#  Glib_FOUND - system has Glib
+#  Glib_INCLUDE_DIRS - the Glib include directories
+#  Glib_LIBRARIES - link these to use Glib
+
+include(LibFindMacros)
+
+# Use pkg-config to get hints about paths
+libfind_pkg_check_modules(Glib_PKGCONF glib-2.0)
+
+# Main include dir
+find_path(Glib_INCLUDE_DIR
+  NAMES glib.h
+  PATHS ${Glib_PKGCONF_INCLUDE_DIRS}
+  PATH_SUFFIXES glib-2.0
+)
+
+# Glib-related libraries also use a separate config header, which is in lib dir
+find_path(GlibConfig_INCLUDE_DIR
+  NAMES glibconfig.h
+  PATHS ${Glib_PKGCONF_INCLUDE_DIRS} /usr
+  PATH_SUFFIXES lib/glib-2.0/include
+)
+
+# Finally the library itself
+find_library(Glib_LIBRARY
+  NAMES glib-2.0
+  PATHS ${Glib_PKGCONF_LIBRARY_DIRS}
+)
+
+# Set the include dir variables and the libraries and let libfind_process do the rest.
+# NOTE: Singular variables for this library, plural for libraries this this lib depends on.
+set(Glib_PROCESS_INCLUDES Glib_INCLUDE_DIR GlibConfig_INCLUDE_DIR)
+set(Glib_PROCESS_LIBS Glib_LIBRARY)
+libfind_process(Glib)
+
+
diff --git a/cmake/LibFindMacros.cmake b/cmake/LibFindMacros.cmake
new file mode 100644
index 000000000..69975c51b
--- /dev/null
+++ b/cmake/LibFindMacros.cmake
@@ -0,0 +1,99 @@
+# Works the same as find_package, but forwards the "REQUIRED" and "QUIET" arguments
+# used for the current package. For this to work, the first parameter must be the
+# prefix of the current package, then the prefix of the new package etc, which are
+# passed to find_package.
+macro (libfind_package PREFIX)
+  set (LIBFIND_PACKAGE_ARGS ${ARGN})
+  if (${PREFIX}_FIND_QUIETLY)
+    set (LIBFIND_PACKAGE_ARGS ${LIBFIND_PACKAGE_ARGS} QUIET)
+  endif (${PREFIX}_FIND_QUIETLY)
+  if (${PREFIX}_FIND_REQUIRED)
+    set (LIBFIND_PACKAGE_ARGS ${LIBFIND_PACKAGE_ARGS} REQUIRED)
+  endif (${PREFIX}_FIND_REQUIRED)
+  find_package(${LIBFIND_PACKAGE_ARGS})
+endmacro (libfind_package)
+
+# CMake developers made the UsePkgConfig system deprecated in the same release (2.6)
+# where they added pkg_check_modules. Consequently I need to support both in my scripts
+# to avoid those deprecated warnings. Here's a helper that does just that.
+# Works identically to pkg_check_modules, except that no checks are needed prior to use.
+macro (libfind_pkg_check_modules PREFIX PKGNAME)
+  if (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)
+    include(UsePkgConfig)
+    pkgconfig(${PKGNAME} ${PREFIX}_INCLUDE_DIRS ${PREFIX}_LIBRARY_DIRS ${PREFIX}_LDFLAGS ${PREFIX}_CFLAGS)
+  else (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)
+    find_package(PkgConfig)
+    if (PKG_CONFIG_FOUND)
+      pkg_check_modules(${PREFIX} ${PKGNAME})
+    endif (PKG_CONFIG_FOUND)
+  endif (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)
+endmacro (libfind_pkg_check_modules)
+
+# Do the final processing once the paths have been detected.
+# If include dirs are needed, ${PREFIX}_PROCESS_INCLUDES should be set to contain
+# all the variables, each of which contain one include directory.
+# Ditto for ${PREFIX}_PROCESS_LIBS and library files.
+# Will set ${PREFIX}_FOUND, ${PREFIX}_INCLUDE_DIRS and ${PREFIX}_LIBRARIES.
+# Also handles errors in case library detection was required, etc.
+macro (libfind_process PREFIX)
+  # Skip processing if already processed during this run
+  if (NOT ${PREFIX}_FOUND)
+    # Start with the assumption that the library was found
+    set (${PREFIX}_FOUND TRUE)
+
+    # Process all includes and set _FOUND to false if any are missing
+    foreach (i ${${PREFIX}_PROCESS_INCLUDES})
+      if (${i})
+        set (${PREFIX}_INCLUDE_DIRS ${${PREFIX}_INCLUDE_DIRS} ${${i}})
+        mark_as_advanced(${i})
+      else (${i})
+        set (${PREFIX}_FOUND FALSE)
+      endif (${i})
+    endforeach (i)
+
+    # Process all libraries and set _FOUND to false if any are missing
+    foreach (i ${${PREFIX}_PROCESS_LIBS})
+      if (${i})
+        set (${PREFIX}_LIBRARIES ${${PREFIX}_LIBRARIES} ${${i}})
+        mark_as_advanced(${i})
+      else (${i})
+        set (${PREFIX}_FOUND FALSE)
+      endif (${i})
+    endforeach (i)
+
+    # Print message and/or exit on fatal error
+    if (${PREFIX}_FOUND)
+      if (NOT ${PREFIX}_FIND_QUIETLY)
+        message (STATUS "Found ${PREFIX} ${${PREFIX}_VERSION}")
+      endif (NOT ${PREFIX}_FIND_QUIETLY)
+    else (${PREFIX}_FOUND)
+      if (${PREFIX}_FIND_REQUIRED)
+        foreach (i ${${PREFIX}_PROCESS_INCLUDES} ${${PREFIX}_PROCESS_LIBS})
+          message("${i}=${${i}}")
+        endforeach (i)
+        message (FATAL_ERROR "Required library ${PREFIX} NOT FOUND.\nInstall the library (dev version) and try again. If the library is already installed, use ccmake to set the missing variables manually.")
+      endif (${PREFIX}_FIND_REQUIRED)
+    endif (${PREFIX}_FOUND)
+  endif (NOT ${PREFIX}_FOUND)
+endmacro (libfind_process)
+
+macro(libfind_library PREFIX basename)
+  set(TMP "")
+  if(MSVC80)
+    set(TMP -vc80)
+  endif(MSVC80)
+  if(MSVC90)
+    set(TMP -vc90)
+  endif(MSVC90)
+  set(${PREFIX}_LIBNAMES ${basename}${TMP})
+  if(${ARGC} GREATER 2)
+    set(${PREFIX}_LIBNAMES ${basename}${TMP}-${ARGV2})
+    string(REGEX REPLACE "\\." "_" TMP ${${PREFIX}_LIBNAMES})
+    set(${PREFIX}_LIBNAMES ${${PREFIX}_LIBNAMES} ${TMP})
+  endif(${ARGC} GREATER 2)
+  find_library(${PREFIX}_LIBRARY
+    NAMES ${${PREFIX}_LIBNAMES}
+    PATHS ${${PREFIX}_PKGCONF_LIBRARY_DIRS}
+  )
+endmacro(libfind_library)
+
diff --git a/cmake/navit_macros.cmake b/cmake/navit_macros.cmake
index 2dad15cd0..0f4ef09fd 100644
--- a/cmake/navit_macros.cmake
+++ b/cmake/navit_macros.cmake
@@ -4,17 +4,17 @@ macro(set_with_reason VARIABLE REASON)
 endmacro()
 
 # modules may be linked static, or shared for import at runtime
-macro(add_module MODULE_PATH)
+macro(add_module MODULE_PATH REASON)
    list(APPEND ALL_MODULES ${MODULE_PATH})
    set(${MODULE_PATH} ${ARGN})
-   set(${MODULE_PATH}_REASON "default")
+   set(${MODULE_PATH}_REASON ${REASON})
 endmacro()
 
 # plugins are always linked static
-macro(add_plugin PLUGIN_PATH)
+macro(add_plugin PLUGIN_PATH REASON)
    list(APPEND ALL_PLUGINS ${PLUGIN_PATH})
    set(${PLUGIN_PATH} ${ARGN})
-   set(${PLUGIN_PATH}_REASON "default")
+   set(${PLUGIN_PATH}_REASON ${REASON})
 endmacro()
 
 macro(module_add_library MODULE_NAME )