libnfnetlink has good doxygen documentation but there was no output when doxygen was run. Patch 1/1 fixes that, but on rebuilding there were a number warnings of the form: right-hand operand of comma expression has no effect [-Wunused-value] *This was not introduced by patch 1/1* Instead, it is caused by the definition of "prefetch" in include/linux_list.h: #define prefetch(x) 1 the Linux kernel has: #define prefetch(x) __builtin_prefetch(x) I see 3 ways to get back to a clean compile: 1. Suppress the warnings with a pragma 2. Reinstate the Linux definition of prefetch 3. Expunge prefetch from the header file I have made all 3, please indicate which one you'd like. 1. & 2. are 1-liners while 3. is multiline. 3. allows of extra simplifications, such as defining a macro in a single line or fewer lines than before. In some places I could also delete the fragment "&& ({ 1;})". Duncan Roe (1): src: Minimally resurrect doxygen documentation configure.ac | 2 +- doxygen.cfg.in | 180 +++++++++++++++++++++++++++++++++++++++++++++++++++ include/linux_list.h | 9 +++ src/iftable.c | 9 +++ src/libnfnetlink.c | 17 ++++- 5 files changed, 215 insertions(+), 2 deletions(-) create mode 100644 doxygen.cfg.in -- 2.14.5