[00/20] ensure headers have correct includes

As a general principle, each header file should include any other
headers it needs to provide data type definitions or macros. For
example, any header using the uintX_t types in structures or function
prototypes should include "stdint.h" to provide those type definitions.

In practice, while many, but not all, headers in DPDK did include all
necessary headers, it was never actually checked that each header could
be included in a C file and compiled without having any compiler errors
about missing definitions. This patchset fixes any missing includes in
public headers from the DPDK "lib" folder and then adds a "chkincs" app.
to verify this on an ongoing basis.

This chkincs app does nothing when run, it's for build-time checking
only. Its source code consists of one C file per public DPDK header,
where that C file contains nothing except an include for that header.
Therefore, if any header is added to the lib folder which fails to
compile when included alone, the build of chkincs will fail with a
suitable error message. Since this compile checking is not needed on
most builds of DPDK, the building of chkincs is disabled by default, but
can be enabled by the "test_includes" meson option. To catch errors with
patch submissions, the final patch of this series enables it for a
single build in test-meson-builds script.

Future work could involve doing similar checks on headers for C++ compatibility,
for example.

Bruce Richardson (20):
  eal: fix missing header inclusion
  telemetry: fix missing header include
  ethdev: fix missing header include
  ring: fix missing includes for c11 model header
  net: fix missing header include
  mbuf: fix missing header include
  bitratestats: fix missing header include
  rib: fix missing header includes
  vhost: fix missing header includes
  ipsec: fix missing header include
  fib: fix missing header includes
  table: fix missing header include
  pipeline: fix missing header includes
  metrics: fix variable declaration in header
  node: fix missing header include
  app: fix extra include paths for app builds
  app/chkincs: add chkincs app to verify headers
  eal: add missing include to mcslock
  eal/x86: add architecture-specific headers to chkincs
  test-meson-builds: add includes check to default x86 build

 app/chkincs/gen_c_file_for_header.py         | 53 ++++++++++++++++++++
 app/chkincs/main.c                           |  4 ++
 app/chkincs/meson.build                      | 28 +++++++++++
 app/meson.build                              |  2 +
 devtools/test-meson-builds.sh                |  2 +-
 lib/librte_bitratestats/rte_bitrate.h        |  1 +
 lib/librte_eal/include/generic/rte_mcslock.h |  1 +
 lib/librte_eal/include/rte_reciprocal.h      |  1 +
 lib/librte_eal/x86/include/meson.build       |  1 +
 lib/librte_ethdev/rte_eth_ctrl.h             |  1 +
 lib/librte_fib/rte_fib.h                     |  1 +
 lib/librte_fib/rte_fib6.h                    |  1 +
 lib/librte_ipsec/rte_ipsec_sad.h             |  1 +
 lib/librte_mbuf/rte_mbuf_core.h              |  1 +
 lib/librte_mbuf/rte_mbuf_dyn.h               |  3 ++
 lib/librte_metrics/rte_metrics_telemetry.c   |  2 +
 lib/librte_metrics/rte_metrics_telemetry.h   |  2 -
 lib/librte_net/rte_geneve.h                  |  1 +
 lib/librte_node/rte_node_ip4_api.h           |  1 +
 lib/librte_pipeline/rte_swx_ctl.h            |  1 +
 lib/librte_pipeline/rte_swx_pipeline.h       |  1 +
 lib/librte_rib/rte_rib.h                     |  2 +
 lib/librte_ring/rte_ring_c11_mem.h           |  4 ++
 lib/librte_table/rte_lru_x86.h               |  1 +
 lib/librte_telemetry/rte_telemetry.h         |  1 +
 lib/librte_vhost/rte_vdpa.h                  |  2 +
 lib/librte_vhost/rte_vdpa_dev.h              |  1 +
 lib/librte_vhost/rte_vhost_crypto.h          |  7 +++
 lib/meson.build                              |  1 +
 meson.build                                  |  1 +
 meson_options.txt                            |  2 +
 31 files changed, 128 insertions(+), 3 deletions(-)
 create mode 100755 app/chkincs/gen_c_file_for_header.py
 create mode 100644 app/chkincs/main.c
 create mode 100644 app/chkincs/meson.build

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2.27.0