Start of an experiment with CMake.

src/xpdev/CMakeLists.txt

+cmake_minimum_required(VERSION 2.8)
+
+INCLUDE (CheckIncludeFiles)
+INCLUDE (CheckFunctionExists) 
+
+project (XPDev C)
+
+option(SDL_AUDIO	"Set to OFF to disable SDL for audio output" ON)
+
+add_library(xpdev SHARED
+    conwrap.c
+    dat_file.c
+    datewrap.c
+    dirwrap.c
+    filewrap.c
+    genwrap.c
+    ini_file.c
+    link_list.c
+    msg_queue.c
+    multisock.c
+    semwrap.c
+    netwrap.c
+    sockwrap.c
+    semfile.c
+    str_list.c
+    strwrap.c
+    threadwrap.c
+    xp_dl.c
+    xpbeep.c
+    xpdatetime.c
+    xpmap.c
+    xpprintf.c
+)
+
+CHECK_INCLUDE_FILES(inttypes.h HAS_INTTYPES_H) 
+if(HAS_INTTYPES_H)
+    target_compile_definitions(xpdev PUBLIC HAS_INTTYPES_H)
+endif()
+
+CHECK_INCLUDE_FILES(sys/soundcard.h HAS_SYS_SOUNDCARD_H) 
+CHECK_INCLUDE_FILES(soundcard.h HAS_SOUNDCARD_H) 
+CHECK_INCLUDE_FILES(linux/inttypes.h HAS_LINUX_SOUNDCARD_H) 
+if(HAS_SYS_SOUNDCARD_H)
+    target_compile_definitions(xpdev PUBLIC SOUNDCARD_H_IN=1)
+elseif(HAS_SOUNDCARD_H)
+    target_compile_definitions(xpdev PUBLIC SOUNDCARD_H_IN=2)
+elseif(HAS_LINUX_SOUNDCARD_H)
+    target_compile_definitions(xpdev PUBLIC SOUNDCARD_H_IN=3)
+endif()
+
+CHECK_INCLUDE_FILES(dev/speaker/speaker.h HAS_DEV_SPEAKER_SPEAKER_H)
+if(HAS_DEV_SPEAKER_SPEAKER_H)
+	target_compile_definitions(xpdev PUBLIC HAS_DEV_SPEAKER_SPEAKER_H)
+endif()
+CHECK_INCLUDE_FILES(dev/machine/speaker.h HAS_DEV_MACHINE_SPEAKER_H)
+if(HAS_DEV_MACHINE_SPEAKER_H)
+	target_compile_definitions(xpdev PUBLIC HAS_DEV_MACHINE_SPEAKER_H)
+endif()
+CHECK_INCLUDE_FILES(dev/speaker/spkr.h HAS_DEV_MACHINE_SPKR_H)
+if(HAS_DEV_MACHINE_SPKR_H)
+	target_compile_definitions(xpdev PUBLIC HAS_DEV_MACHINE_SPKR_H)
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL "Haiku")
+	target_link_libraries(xpdev m)
+	target_link_libraries(xpdev network)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
+	target_link_libraries(xpdev ossaudio pthread)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
+	target_link_libraries(xpdev ossaudio pthread)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "SunOS")
+	target_link_libraries(xpdev socket pthread)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "OS X")
+	target_link_libraries(xpdev pthread)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "QNX")
+	target_link_libraries(xpdev pthread)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+	target_link_libraries(xpdev pthread)
+elseif(WIN32)
+	target_link_libraries(xpdev ws2_32 winmm)
+endif()
+
+if(EXISTS /dev/urandom)
+	target_compile_definitions(xpdev PUBLIC HAS_DEV_URANDOM URANDOM_DEV="/dev/urandom")
+endif()
+if(EXISTS /dev/random)
+	target_compile_definitions(xpdev PUBLIC HAS_DEV_RANDOM RANDOM_DEV="/dev/random")
+endif()
+
+CHECK_FUNCTION_EXISTS(random HAS_RANDOM_FUNC) 
+if(HAS_RANDOM_FUNC)
+	target_compile_definitions(xpdev PUBLIC HAS_RANDOM_FUNC)
+endif()
+
+CHECK_FUNCTION_EXISTS(srandomdev HAS_SRANDOMDEV_FUNC)
+if(HAS_SRANDOMDEV_FUNC)
+	target_compile_definitions(xpdev PUBLIC HAS_SRANDOMDEV_FUNC)
+endif()