From 5ed27ef8b6362ee2a30dd8f6094fa8ca32a97439 Mon Sep 17 00:00:00 2001
From: Tom Jones <thj@freebsd.org>
Date: Mon, 29 Jan 2024 14:38:19 +0000
Subject: build: Discover libepoll-shim on FreeBSD

FreeBSD doesn't offer epoll, but an implementation which uses kqueue is
available as an external library. On FreeBSD in subsystems which require
epoll have cmake look for libepoll-shim.

Type: improvement
Change-Id: Iafd5406a9e2ebaa53fd94034489ffbbf87a7d040
Signed-off-by: Tom Jones <thj@freebsd.org>
---
 src/CMakeLists.txt      | 15 +++++++++++++++
 src/vlib/CMakeLists.txt |  2 +-
 src/vpp/CMakeLists.txt  |  6 +++---
 3 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9415c4d44fb..68d0a4fe64e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -244,6 +244,21 @@ include(cmake/library.cmake)
 include(cmake/exec.cmake)
 include(cmake/plugin.cmake)
 
+##############################################################################
+# FreeBSD - use epoll-shim
+##############################################################################
+set(EPOLL_LIB "")
+if("${CMAKE_SYSTEM_NAME}" STREQUAL "FreeBSD")
+  find_path(EPOLL_SHIM_INCLUDE_DIR NAMES sys/epoll.h HINTS /usr/local/include/libepoll-shim)
+  find_library(EPOLL_SHIM_LIB NAMES epoll-shim HINTS /usr/local/lib)
+
+  if(EPOLL_SHIM_INCLUDE_DIR AND EPOLL_SHIM_LIB)
+    message(STATUS "Found epoll-shim in ${EPOLL_SHIM_INCLUDE_DIR}")
+    include_directories(${EPOLL_SHIM_INCLUDE_DIR})
+    string(JOIN " " EPOLL_LIB "${EPOLL_SHIM_LIB}")
+  endif()
+endif()
+
 ##############################################################################
 # subdirs - order matters
 ##############################################################################
diff --git a/src/vlib/CMakeLists.txt b/src/vlib/CMakeLists.txt
index 61e8ba7dd78..7ec9b2050e9 100644
--- a/src/vlib/CMakeLists.txt
+++ b/src/vlib/CMakeLists.txt
@@ -153,7 +153,7 @@ add_vpp_library(vlib
   API_FILES
   pci/pci_types.api
 
-  LINK_LIBRARIES vppinfra svm ${CMAKE_DL_LIBS}
+  LINK_LIBRARIES vppinfra svm ${CMAKE_DL_LIBS} ${EPOLL_LIB}
 
   DEPENDS api_headers
 )
diff --git a/src/vpp/CMakeLists.txt b/src/vpp/CMakeLists.txt
index 37f57ac7823..84144e4d059 100644
--- a/src/vpp/CMakeLists.txt
+++ b/src/vpp/CMakeLists.txt
@@ -90,7 +90,7 @@ endif()
 add_vpp_executable(vpp
   ENABLE_EXPORTS
   SOURCES ${VPP_SOURCES}
-  LINK_LIBRARIES svm vlib vppinfra vlibmemory vnet Threads::Threads ${CMAKE_DL_LIBS}
+  LINK_LIBRARIES svm vlib vppinfra vlibmemory vnet Threads::Threads ${CMAKE_DL_LIBS} ${EPOLL_LIB}
   DEPENDS vpp_version_h api_headers
 )
 
@@ -99,7 +99,7 @@ add_vpp_executable(vpp
 ##############################################################################
 add_vpp_executable(vppctl
   SOURCES app/vppctl.c
-  LINK_LIBRARIES vppinfra
+  LINK_LIBRARIES vppinfra ${EPOLL_LIB}
 )
 
 ##############################################################################
@@ -122,7 +122,7 @@ add_vpp_executable(vpp_get_stats
 
 add_vpp_executable(vpp_prometheus_export
   SOURCES app/vpp_prometheus_export.c
-  LINK_LIBRARIES vppapiclient vppinfra svm vlibmemoryclient
+  LINK_LIBRARIES vppapiclient vppinfra svm vlibmemoryclient ${EPOLL_LIB}
   DEPENDS api_headers
 )
 
-- 
cgit 1.2.3-korg