[Performous-commit] Lasse Karkkainen : Link PulseAudio on Linux ( required for by QtMultiMediaKit)

[Lasse Kärkkäi. <tr...@us...>]

Module: editor
Branch: master
Commit: 1e68bf0b23e8298aba3e2a6b3c993bc3a9b7bb48

Author: Lasse Karkkainen <tro...@tr...>
Date:   Tue Jan 18 11:29:23 2011 +0100

Link PulseAudio on Linux (required for by QtMultiMediaKit)

---

 CMakeLists.txt            |    6 +++
 cmake/FindLibPulse.cmake  |   28 ++++++++++++++++
 cmake/LibFindMacros.cmake |   76 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 110 insertions(+), 0 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c4df760..0e173b6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,6 +24,12 @@ find_package(Qt4 COMPONENTS QtCore QtGui QtXml QtNetwork QtMultimediaKit REQUIRE
 include(${QT_USE_FILE})
 list(APPEND LIBS ${QT_LIBRARIES})
 
+# Not used directly but is a dep of QtMultimediaKit
+if(${CMAKE_SYSTEM_NAME} MATCHES Linux)
+	find_package(LibPulse REQUIRED)
+	list(APPEND LIBS ${LibPulse_LIBRARIES})
+endif()
+
 # Headers that need MOC need to be defined separately
 file(GLOB MOC_HEADER_FILES "editorapp.hh" "notelabel.hh" "notegraphwidget.hh")
 
diff --git a/cmake/FindLibPulse.cmake b/cmake/FindLibPulse.cmake
new file mode 100644
index 0000000..aebeac0
--- /dev/null
+++ b/cmake/FindLibPulse.cmake
@@ -0,0 +1,28 @@
+# - Try to find LibPulse
+# Once done, this will define
+#
+#  LibPulse_FOUND - system has LibPulse
+#  LibPulse_INCLUDE_DIRS - the LibPulse include directories
+#  LibPulse_LIBRARIES - link these to use LibPulse
+#
+# See documentation on how to write CMake scripts at
+# http://www.cmake.org/Wiki/CMake:How_To_Find_Libraries
+
+include(LibFindMacros)
+
+libfind_pkg_check_modules(LibPulse_PKGCONF libpulse)
+
+find_path(LibPulse_INCLUDE_DIR
+  NAMES pulse/pulseaudio.h
+  PATHS ${LibPulse_PKGCONF_INCLUDE_DIRS}
+)
+
+find_library(LibPulse_LIBRARY
+  NAMES pulse
+  PATHS ${LibPulse_PKGCONF_LIBRARY_DIRS}
+)
+
+set(LibPulse_PROCESS_INCLUDES LibPulse_INCLUDE_DIR)
+set(LibPulse_PROCESS_LIBS LibPulse_LIBRARY)
+libfind_process(LibPulse)
+
diff --git a/cmake/LibFindMacros.cmake b/cmake/LibFindMacros.cmake
new file mode 100644
index 0000000..83b68b5
--- /dev/null
+++ b/cmake/LibFindMacros.cmake
@@ -0,0 +1,76 @@
+# Works the same as find_package, but forwards the "REQUIRED" argument used for
+# the current package and always uses the "QUIET" flag. 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 ${ARGN} QUIET)
+  if (${PREFIX}_FIND_REQUIRED)
+    set (LIBFIND_PACKAGE_ARGS ${LIBFIND_PACKAGE_ARGS} REQUIRED)
+  endif (${PREFIX}_FIND_REQUIRED)
+  find_package(${LIBFIND_PACKAGE_ARGS})
+endmacro (libfind_package)
+
+# Damn CMake developers made the UsePkgConfig system deprecated in the same release (2.6)
+# where they added pkg_check_modules. Consequently I need to support both in my scripts
+# to avoid those deprecated warnings. Here's a helper that does just that.
+# Works identically to pkg_check_modules, except that no checks are needed prior to use.
+macro (libfind_pkg_check_modules PREFIX PKGNAME)
+  if (${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)
+