build: Improve build by cmake for Cygwin (#2085)

- Fix build on Cygwin.
- Simplify file name of static library.

Co-authored-by: Jameson Nash <vtjnash@gmail.com>

CMakeLists.txt

@@ -419,6 +419,20 @@ if(APPLE OR CMAKE_SYSTEM_NAME MATCHES "DragonFly|FreeBSD|Linux|NetBSD|OpenBSD")
   list(APPEND uv_test_libraries util)
 endif()
 
+if(CYGWIN OR MSYS)
+  list(APPEND uv_defines _GNU_SOURCE)
+  list(APPEND uv_sources
+       src/unix/cygwin.c
+       src/unix/bsd-ifaddrs.c
+       src/unix/no-fsevents.c
+       src/unix/no-proctitle.c
+       src/unix/posix-hrtime.c
+       src/unix/posix-poll.c
+       src/unix/procfs-exepath.c
+       src/unix/sysinfo-loadavg.c
+       src/unix/sysinfo-memory.c)
+endif()
+
 if(LIBUV_BUILD_SHARED)
   add_library(uv SHARED ${uv_sources})
   target_compile_definitions(uv
@@ -439,6 +453,7 @@ if(LIBUV_BUILD_SHARED)
     set_target_properties(uv PROPERTIES LINKER_LANGUAGE CXX)
   endif()
   target_link_libraries(uv ${uv_libraries})
+  set_target_properties(uv PROPERTIES OUTPUT_NAME "uv")
 endif()
 
 add_library(uv_a STATIC ${uv_sources})
@@ -455,6 +470,10 @@ if(CMAKE_SYSTEM_NAME STREQUAL "OS390")
   set_target_properties(uv_a PROPERTIES LINKER_LANGUAGE CXX)
 endif()
 target_link_libraries(uv_a ${uv_libraries})
+set_target_properties(uv_a PROPERTIES OUTPUT_NAME "uv")
+if(MSVC)
+  set_target_properties(uv_a PROPERTIES PREFIX "lib")
+endif()
 
 if(LIBUV_BUILD_TESTS)
   # Small hack: use ${uv_test_sources} now to get the runner skeleton,

libuv-static.pc.in

@@ -8,5 +8,5 @@ Version: @PACKAGE_VERSION@
 Description: multi-platform support library with a focus on asynchronous I/O.
 URL: http://libuv.org/
 
-Libs: -L${libdir} -luv_a @LIBS@
+Libs: -L${libdir} -l:libuv.a @LIBS@
 Cflags: -I${includedir}

libuv.pc.in

@@ -2,6 +2,7 @@ prefix=@prefix@
 exec_prefix=${prefix}
 libdir=@libdir@
 includedir=@includedir@
+LIBUV_STATIC=-L${libdir} -l:libuv.a @LIBS@
 
 Name: libuv
 Version: @PACKAGE_VERSION@