cmake: generate and install pkgconfig files

many packages expect packageconfig support especially for detecting EGL
libraries. This patch helps in compiling those packages on RPi

Signed-off-by: Khem Raj <raj.khem@gmail.com>

CMakeLists.txt

@@ -113,6 +113,14 @@ set(vmcs_host_apps_VERSION_MAJOR 1)
 set(vmcs_host_apps_VERSION_MINOR 0)
 
 include_directories("${PROJECT_BINARY_DIR}")
-
+include(FindPkgConfig QUIET)
+if(PKG_CONFIG_FOUND)
+	# Produce a pkg-config file
+	foreach(PCFILE bcm_host.pc  egl.pc  glesv2.pc  vg.pc)
+		configure_file("pkgconfig/${PCFILE}.in" "${PCFILE}" @ONLY)
+		install(FILES       "${CMAKE_CURRENT_BINARY_DIR}/${PCFILE}"
+			DESTINATION "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig")
+	endforeach()
+endif()
 # Remove cache entry, if one added by command line
 unset(KHRONOS_EGL_PLATFORM CACHE)

pkgconfig/bcm_host.pc.in

@@ -0,0 +1,10 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: bcm_host
+Description: Broadcom VideoCore host API library
+Version: 1
+Libs: -L${libdir} -lbcm_host -lvcos -lvchiq_arm -pthread
+Cflags: -I${includedir} -I${includedir}/interface/vmcs_host/linux -I${includedir}/interface/vcos/pthreads -DUSE_VCHIQ_ARM

pkgconfig/egl.pc.in

@@ -0,0 +1,13 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: EGL
+Description: Fake EGL package for RPi
+Version: 10
+Requires: bcm_host
+Libs: -L${libdir} -lEGL -lGLESv2 -lbcm_host -lvchostif
+Cflags: -I${includedir} -I${includedir}/interface/vmcs_host/linux \
+        -I${includedir}/interface/vcos/pthreads
+

pkgconfig/glesv2.pc.in

@@ -0,0 +1,12 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: GLESv2
+Description: Fake GL ES 2 package for RPi
+Version: 10
+Requires: bcm_host
+Libs: -L${libdir} -lGLESv2
+Cflags: -I${includedir}
+

pkgconfig/vg.pc.in

@@ -0,0 +1,11 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: OpenVG
+Description: Fake OpenVG package for RPi
+Version: 10
+Requires: bcm_host
+Libs: -L${libdir} -lOpenVG
+Cflags: -I${includedir}