On Fri, 13 Aug 2021 01:02:50 +0000 William Tu <u9012...@gmail.com> wrote:
> Currently there are some public headers that include 'sys/queue.h', which > is not POSIX, but usually provided by Linux/BSD system library. > (Not in POSIX.1, POSIX.1-2001, or POSIX.1-2008. Present on the BSDs.) > The file is missing on Windows. During the windows build, DPDK uses a > bundled copy, so building DPDK library works fine. But when OVS or other > applications use DPDK as a library, because some DPDK public headers > include 'sys/queue.h', on Windows, it triggers error due to no such file. > > One solution is to installl the 'lib/eal/windows/include/sys/queue.h' into > Windows environment, such as [1]. However, this means DPDK exports the > functinoalities of 'sys/queue.h' into the environment, which might cause > symbols, macros, headers clashing with other applications. > > The patch fixes it by removing the "#include <sys/queue.h>" from > DPDK public headers, so programs including DPDK headers don't depend > on system to provide 'sys/queue.h'. When these public headers use > macros such as TAILQ_xxx, we replace it with RTE_ prefix. > For Windows, we copy the definitions from <sys/queue.h> to rte_os.h > under windows. Note that these RTE_ macros are compatible with > <sys/queue.h>, only at the level of API (to use with <sys/queue.h> > macros in C files) and ABI (to avoid breaking it). > > Additionally, the TAILQ_FOREACH_SAFE is not part of <sys/queue.h>, > the patch replaces it with RTE_TAILQ_FOREACH_SAFE. > With this patch, all the public headers no longer have > "#include <sys/queue.h>" or "TAILQ_xxx" macros. Please run a spell checker on the commit message if you resubmit.
