From 1915ce613387c135ae8e3bc55190e3e7473313d2 Mon Sep 17 00:00:00 2001
From: Gerald Combs <gerald@wireshark.org>
Date: Mon, 12 Mar 2018 13:40:56 -0700
Subject: [PATCH] CMake: Skip some header checks on Windows.

Skip some header checks on Windows when we're sure they will always
be true.

Change-Id: I4ff7c867b9268a53692085553055dcbc0f90ae1d
Reviewed-on: https://code.wireshark.org/review/26452
Reviewed-by: Gerald Combs <gerald@wireshark.org>
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
---
 ConfigureChecks.cmake        |  8 ++++++++
 cmake/modules/FindPCAP.cmake | 22 +++++++++++++++++++++-
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/ConfigureChecks.cmake b/ConfigureChecks.cmake
index 1e7a75ae55..0a6c1fc065 100644
--- a/ConfigureChecks.cmake
+++ b/ConfigureChecks.cmake
@@ -9,6 +9,14 @@
 
 include(CMakePushCheckState)
 
+if(WIN32)
+	# Prepopulate some values. Compilation checks on Windows can be slow.
+	set(HAVE_FCNTL_H TRUE)
+	set(HAVE_SYS_STAT_H TRUE)
+	set(HAVE_FLOORL TRUE)
+	set(HAVE_LRINT TRUE)
+endif(WIN32)
+
 #check system for includes
 include(CheckIncludeFile)
 check_include_file("arpa/inet.h"         HAVE_ARPA_INET_H)
diff --git a/cmake/modules/FindPCAP.cmake b/cmake/modules/FindPCAP.cmake
index 469a8347ac..c963e19ae0 100644
--- a/cmake/modules/FindPCAP.cmake
+++ b/cmake/modules/FindPCAP.cmake
@@ -53,6 +53,26 @@ if( PCAP_FOUND )
   set( CMAKE_REQUIRED_INCLUDES ${PCAP_INCLUDE_DIRS} )
   set( CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARIES} )
 
+  if(WIN32)
+    # Prepopulate some values. WinPcap and NPcap always have these and
+    # compilation checks on Windows can be slow.
+    set(HAVE_PCAP_OPEN_DEAD TRUE)
+    set(HAVE_PCAP_FREECODE TRUE)
+    set(HAVE_PCAP_BREAKLOOP TRUE)
+    set(HAVE_PCAP_CREATE TRUE)
+    set(HAVE_PCAP_DATALINK_NAME_TO_VAL TRUE)
+    set(HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION TRUE)
+    set(HAVE_PCAP_DATALINK_VAL_TO_NAME TRUE)
+    set(HAVE_PCAP_FINDALLDEVS TRUE)
+    set(HAVE_PCAP_FREE_DATALINKS TRUE)
+    set(HAVE_PCAP_LIB_VERSION TRUE)
+    set(HAVE_PCAP_LIST_DATALINKS TRUE)
+    set(HAVE_PCAP_SET_DATALINK TRUE)
+    set(HAVE_BPF_IMAGE TRUE)
+    set(HAVE_PCAP_OPEN TRUE)
+    set(HAVE_PCAP_SETSAMPLING TRUE)
+  endif(WIN32)
+
   check_function_exists( "pcap_open_dead" HAVE_PCAP_OPEN_DEAD )
   check_function_exists( "pcap_freecode" HAVE_PCAP_FREECODE )
   #
@@ -63,7 +83,7 @@ if( PCAP_FOUND )
   #
   check_function_exists( "pcap_breakloop" HAVE_PCAP_BREAKLOOP )
   check_function_exists( "pcap_create" HAVE_PCAP_CREATE )
-  if( HAVE_PCAP_CREATE OR WIN32 )
+  if( HAVE_PCAP_CREATE )
     #
     # If we have pcap_create(), we have pcap_set_buffer_size(), and
     # can set the capture buffer size.