Make building of doxygen based C API docs configurable.

Signed-off-by: Jaco Kroon <[email protected]>

Author: jkroonza

README.md

@@ -61,6 +61,12 @@ Commands I am using for building the RPM:
     make clean && make
 ## Other build options
 
+### ``-DBUILD_DOC_C=OFF``
+
+Build C API documentation (Default: ON)
+
+Disable building of C API documentation, which requires doxygen to be present.
+
 ### ``-DENABLE_LEGACY_WEAKDEPS=ON``
 
 Enable legacy SUSE/Mageia/Mandriva weakdeps support (Default: ON)

doc/CMakeLists.txt

@@ -3,14 +3,15 @@ ADD_SUBDIRECTORY (python)
 ADD_CUSTOM_TARGET (doc)
 ADD_DEPENDENCIES (doc doc-python)
 
-find_package(Doxygen)
-if(DOXYGEN_FOUND)
+option(BUILD_DOC_C "Build C API documentation" ON)
+if(BUILD_DOC_C)
+    find_package(Doxygen REQUIRED)
     CONFIGURE_FILE("Doxyfile.in.in" "${CMAKE_CURRENT_BINARY_DIR}/Doxyfile.in" @ONLY)
     add_custom_target(doc-c
         ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile.in
         COMMENT "Building C API documentation with Doxygen" VERBATIM)
     ADD_DEPENDENCIES (doc doc-c)
-endif(DOXYGEN_FOUND)
+endif(BUILD_DOC_C)
 
 IF(CREATEREPO_C_INSTALL_MANPAGES)
     INSTALL(FILES createrepo_c.8 mergerepo_c.8 modifyrepo_c.8 sqliterepo_c.8