gentoo-overlay/dev-util/apitrace/files/apitrace-3.0-glxtrace-only.patch

--- apitrace-apitrace-de9f3e5/CMakeLists.txt
+++ apitrace-apitrace-de9f3e5/CMakeLists.txt
@@ -19,6 +19,8 @@
 
 set (ENABLE_EGL "AUTO" CACHE STRING "Enable EGL support.")
 
+option (BUILD_LIB_ONLY "Build the glxtrace library only" OFF)
+
 
 ##############################################################################
 # Find dependencies
@@ -159,7 +161,13 @@
 include_directories (${ZLIB_INCLUDE_DIRS} ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/zlib)
 link_libraries (${ZLIB_LIBRARIES})
 
-find_package (SNAPPY REQUIRED)
+if (BUILD_LIB_ONLY)
+	set (SNAPPY_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/snappy)
+	set (SNAPPY_LIBRARIES snappy_bundled)
+	add_subdirectory (thirdparty/snappy EXCLUDE_FROM_ALL)
+else (BUILD_LIB_ONLY)
+	find_package (SNAPPY REQUIRED)
+endif (BUILD_LIB_ONLY)
 include_directories (${SNAPPY_INCLUDE_DIRS})
 link_libraries (${SNAPPY_LIBRARIES})
 
@@ -182,6 +190,8 @@
 # By bundling the QJSON source, we make it much more easier to build the GUI on
 # Windows and MacOSX.  But we only use the bundled sources when ENABLE_GUI is
 # AUTO.
+if (NOT BUILD_LIB_ONLY)
+
 if (QT4_FOUND AND NOT QJSON_FOUND AND (ENABLE_GUI STREQUAL "AUTO"))
     add_subdirectory (thirdparty/qjson EXCLUDE_FROM_ALL)
     set (QJSON_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty)
@@ -190,6 +200,8 @@
     set (QJSON_FOUND TRUE)
 endif ()
 
+endif (NOT BUILD_LIB_ONLY)
+
 # For glext headers.  Needs to be before system includes as often system's GL
 # headers bundle and include glext.h and glxext.h
 include_directories (BEFORE ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/glext)
@@ -497,6 +513,8 @@
 ##############################################################################
 # API retracers
 
+if (NOT BUILD_LIB_ONLY)
+
 add_custom_command (
     OUTPUT glretrace_gl.cpp
     COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/glretrace.py > ${CMAKE_CURRENT_BINARY_DIR}/glretrace_gl.cpp
@@ -624,6 +642,8 @@
     add_subdirectory(gui)
 endif ()
 
+endif (NOT BUILD_LIB_ONLY)
+
 
 ##############################################################################
 # Packaging