From 30c68d029dd6f1e841dd61c1cf541d6fafd67a20 Mon Sep 17 00:00:00 2001
From: Andy Green <andy@warmcat.com>
Date: Sat, 18 Jul 2020 07:00:57 +0100
Subject: [PATCH] cmake: pkgconfig: make sure to list platform libs

https://github.com/warmcat/libwebsockets/issues/1975
---
 lib/CMakeLists.txt | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 6ed6b50e8..7392f68a7 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -258,6 +258,18 @@ set(CPACK_COMPONENT_DEV_DISPLAY_NAME "Development files" PARENT_SCOPE)
 
 if (UNIX)
 
+# figure out pkfcfg required libs here
+
+set(lws_requires "")
+if (LWS_HAVE_LIBCAP)
+	if (NOT lws_requires STREQUAL "")
+		set(lws_requires "${lws_requires},libpcap")
+	else()
+		set(lws_requires "libpcap")
+	endif()
+endif()
+
+
 # Generate and install pkgconfig.
 # (This is not indented, because the tabs will be part of the output)
 file(WRITE "${PROJECT_BINARY_DIR}/libwebsockets.pc"
@@ -271,8 +283,13 @@ Description: Websockets server and client library
 Version: ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_PACKAGE_VERSION_PATCH}
 
 Libs: -L\${libdir} -lwebsockets
-Cflags: -I\${includedir}"
+Cflags: -I\${includedir}
+"
 )
+if (NOT ${lws_requires} STREQUAL "")
+        file(APPEND "${PROJECT_BINARY_DIR}/libwebsockets.pc" "Requires: ${lws_requires}")
+endif()
+
 
 	install(FILES "${PROJECT_BINARY_DIR}/libwebsockets.pc"
 		DESTINATION lib${LIB_SUFFIX}/pkgconfig)
@@ -289,9 +306,15 @@ Version: ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_P
 
 Libs: -L\${libdir} -lwebsockets_static
 Libs.private:
-Cflags: -I\${includedir}"
+Cflags: -I\${includedir}
+"
 )
 
+if (NOT ${lws_requires} STREQUAL "")
+        file(APPEND "${PROJECT_BINARY_DIR}/libwebsockets_static.pc" "Requires: ${lws_requires}")
+endif()
+
+
 	install(FILES "${PROJECT_BINARY_DIR}/libwebsockets_static.pc"
 		DESTINATION lib${LIB_SUFFIX}/pkgconfig)