gentoo-overlay/media-gfx/exiv2/files/exiv2-0.25-tools-optional.patch

--- a/CMakeLists.txt	2015-06-15 17:32:21.000000000 +0200
+++ b/CMakeLists.txt	2015-10-04 14:37:05.319679836 +0200
@@ -55,6 +55,7 @@
 OPTION( EXIV2_ENABLE_WEBREADY      "Build webready support into library"                   OFF )
 OPTION( EXIV2_ENABLE_CURL          "USE Libcurl for HttpIo"                                ON  )
 OPTION( EXIV2_ENABLE_SSH           "USE Libssh for SshIo"                                  ON  )
+OPTION( EXIV2_ENABLE_TOOLS         "Build exiv2 executable"                                ON  )
 
 IF( MINGW OR UNIX )
     IF ( CMAKE_CXX_COMPILER STREQUAL "g++" OR CMAKE_C_COMPILER STREQUAL "gcc" )
--- a/src/CMakeLists.txt	2015-06-14 11:12:19.000000000 +0200
+++ b/src/CMakeLists.txt	2015-10-04 14:33:27.784399402 +0200
@@ -296,9 +296,11 @@
 
 # ******************************************************************************
 # exiv2 application
-ADD_EXECUTABLE( exiv2 ${EXIV2_SRC} )
-TARGET_LINK_LIBRARIES( exiv2 exiv2lib )
-INSTALL( TARGETS exiv2 ${INSTALL_TARGET_STANDARD_ARGS} )
+IF( EXIV2_ENABLE_TOOLS )
+    ADD_EXECUTABLE( exiv2 ${EXIV2_SRC} )
+    TARGET_LINK_LIBRARIES( exiv2 exiv2lib )
+    INSTALL( TARGETS exiv2 ${INSTALL_TARGET_STANDARD_ARGS} )
+ENDIF( EXIV2_ENABLE_TOOLS )
 
 # ******************************************************************************
 # connection test application