Deal with the missing dependencies for libuv.

Since libuv.pc is broken at the moment, try to determine libuv's
dependencies ourselves.  This ports most of the checks from libuv into
our CMake build, and fixes the build on other unix platforms.

CMakeLists.txt

@@ -40,10 +40,6 @@ if(NOT CMAKE_USE_PTHREADS_INIT)
   message(SEND_ERROR "The pthread library must be installed on your system.")
 endif(NOT CMAKE_USE_PTHREADS_INIT)
 
-# Detect if clock_gettime exists in -lrt. If so we need to link with it because
-# the static libuv doesn't but uses clock_gettime.
-check_library_exists(rt clock_gettime "time.h" HAVE_CLOCK_GETTIME)
-
 find_package(LibIntl)
 if(LibIntl_FOUND)
   include_directories(${LibIntl_INCLUDE_DIR})

cmake/FindLibUV.cmake

@@ -46,6 +46,45 @@ mark_as_advanced(LIBUV_INCLUDE_DIR LIBUV_LIBRARY)
 set(LIBUV_LIBRARIES ${LIBUV_LIBRARY})
 set(LIBUV_INCLUDE_DIRS ${LIBUV_INCLUDE_DIR})
 
+# Deal with the fact that libuv.pc is missing important dependency information.
+
+include(CheckLibraryExists)
+
+check_library_exists(dl dlopen "dlfcn.h" HAVE_LIBDL)
+if(HAVE_LIBDL)
+  list(APPEND LIBUV_LIBRARIES dl)
+endif()
+
+check_library_exists(kstat kstat_lookup "kstat.h" HAVE_LIBKSTAT)
+if(HAVE_LIBKSTAT)
+  list(APPEND LIBUV_LIBRARIES kstat)
+endif()
+
+check_library_exists(kvm kvm_open "kvm.h" HAVE_LIBKVM)
+if(HAVE_LIBKVM)
+  list(APPEND LIBUV_LIBRARIES kvm)
+endif()
+
+check_library_exists(nsl gethostbyname "nsl.h" HAVE_LIBNSL)
+if(HAVE_LIBNSL)
+  list(APPEND LIBUV_LIBRARIES nsl)
+endif()
+
+check_library_exists(perfstat perfstat_cpu "libperfstat.h" HAVE_LIBPERFSTAT)
+if(HAVE_LIBPERFSTAT)
+  list(APPEND LIBUV_LIBRARIES perfstat)
+endif()
+
+check_library_exists(rt clock_gettime "time.h" HAVE_LIBRT)
+if(HAVE_LIBRT)
+  list(APPEND LIBUV_LIBRARIES rt)
+endif()
+
+check_library_exists(sendfile sendfile "" HAVE_LIBSENDFILE)
+if(HAVE_LIBSENDFILE)
+  list(APPEND LIBUV_LIBRARIES sendfile)
+endif()
+
 include(FindPackageHandleStandardArgs)
 
 # handle the QUIETLY and REQUIRED arguments and set LIBUV_FOUND to TRUE

src/CMakeLists.txt

@@ -1,3 +1,5 @@
+include(CheckLibraryExists)
+
 file( GLOB NEOVIM_SOURCES *.c )
 
 foreach(sfile ${NEOVIM_SOURCES})
@@ -25,25 +27,12 @@ if(CMAKE_C_COMPILER_ID MATCHES "Clang")
   endif()
 endif()
 
-# The libraries we link against for nvim
+# Our dependencies come first.
-set(NVIM_LINK_LIBRARIES
-    m
-    ${LIBUV_LIBRARIES}
-    ${LUAJIT_LIBRARIES}
-    ${CMAKE_THREAD_LIBS_INIT})
-
-# Add any libraries needed for a specific platform
-if(HAVE_CLOCK_GETTIME)
-  # Work around libuv.a not linking in rt.
-  list(APPEND NVIM_LINK_LIBRARIES rt)
-endif(HAVE_CLOCK_GETTIME)
 
 if (LibIntl_FOUND)
   list(APPEND NVIM_LINK_LIBRARIES ${LibIntl_LIBRARY})
 endif()
 
-include(CheckLibraryExists)
-
 check_library_exists(curses tgetent "" HAVE_LIBCURSES)
 if (HAVE_LIBCURSES)
   list(APPEND NVIM_LINK_LIBRARIES curses)
@@ -52,6 +41,13 @@ else()
   list(APPEND NVIM_LINK_LIBRARIES ${CURSES_LIBRARIES})
 endif()
 
+# Put these last on the link line, since multiple things may depend on them.
+list(APPEND NVIM_LINK_LIBRARIES
+    ${LIBUV_LIBRARIES}
+    ${LUAJIT_LIBRARIES}
+    m
+    ${CMAKE_THREAD_LIBS_INIT})
+
 if(NOT DEFINED ENV{SKIP_EXEC})
   add_executable(nvim ${NEOVIM_SOURCES} ${OS_SOURCES})
   target_link_libraries(nvim ${NVIM_LINK_LIBRARIES})