cmake: add missing checks

- check for arc4random. To make rand.c use it accordingly.
- check for fcntl
- fix fseek detection
- add SIZEOF_CURL_SOCKET_T
- fix USE_UNIX_SOCKETS
- define HAVE_SNPRINTF to 1
- check for fnmatch
- check for sched_yield
- remove HAVE_GETPPID duplicate from curl_config.h
- add HAVE_SENDMSG

Ref: #11964

Co-authored-by: Viktor Szakats
Closes #11973

CMake/Platforms/WindowsCache.cmake

@@ -52,6 +52,9 @@ if(NOT UNIX)
     set(HAVE_GETHOSTNAME 1)
     set(HAVE_LIBZ 0)
 
+    set(HAVE_ARC4RANDOM 0)
+    set(HAVE_FNMATCH 0)
+    set(HAVE_SCHED_YIELD 0)
     set(HAVE_ARPA_INET_H 0)
     set(HAVE_FCNTL_H 1)
     set(HAVE_IFADDRS_H 0)

CMakeLists.txt

@@ -1102,8 +1102,10 @@ elseif(HAVE_LIBSOCKET)
 endif()
 
 check_symbol_exists(fchmod        "${CURL_INCLUDES}" HAVE_FCHMOD)
+check_symbol_exists(fnmatch       "${CURL_INCLUDES};fnmatch.h" HAVE_FNMATCH)
 check_symbol_exists(basename      "${CURL_INCLUDES};string.h" HAVE_BASENAME)
 check_symbol_exists(socket        "${CURL_INCLUDES}" HAVE_SOCKET)
+check_symbol_exists(sched_yield   "${CURL_INCLUDES};sched.h" HAVE_SCHED_YIELD)
 check_symbol_exists(socketpair    "${CURL_INCLUDES}" HAVE_SOCKETPAIR)
 check_symbol_exists(recv          "${CURL_INCLUDES}" HAVE_RECV)
 check_symbol_exists(send          "${CURL_INCLUDES}" HAVE_SEND)
@@ -1116,6 +1118,8 @@ check_symbol_exists(stricmp       "${CURL_INCLUDES};string.h" HAVE_STRICMP)
 check_symbol_exists(strcmpi       "${CURL_INCLUDES};string.h" HAVE_STRCMPI)
 check_symbol_exists(memrchr       "${CURL_INCLUDES};string.h" HAVE_MEMRCHR)
 check_symbol_exists(alarm         "${CURL_INCLUDES}" HAVE_ALARM)
+check_symbol_exists(arc4random    "${CURL_INCLUDES};stdlib.h" HAVE_ARC4RANDOM)
+check_symbol_exists(fcntl         "${CURL_INCLUDES}" HAVE_FCNTL)
 check_symbol_exists(getppid       "${CURL_INCLUDES}" HAVE_GETPPID)
 check_symbol_exists(utimes        "${CURL_INCLUDES}" HAVE_UTIMES)
 

lib/curl_config.h.cmake

@@ -159,6 +159,9 @@
 /* Define to 1 if you have the alarm function. */
 #cmakedefine HAVE_ALARM 1
 
+/* Define to 1 if you have the arc4random function. */
+#cmakedefine HAVE_ARC4RANDOM 1
+
 /* Define to 1 if you have the <arpa/inet.h> header file. */
 #cmakedefine HAVE_ARPA_INET_H 1
 
@@ -168,6 +171,9 @@
 /* Define to 1 if you have the `fchmod' function. */
 #cmakedefine HAVE_FCHMOD 1
 
+/* Define to 1 if you have the `fnmatch' function. */
+#cmakedefine HAVE_FNMATCH 1
+
 /* Define to 1 if you have the `basename' function. */
 #cmakedefine HAVE_BASENAME 1
 
@@ -195,6 +201,12 @@
 /* Define to 1 if you have the freeaddrinfo function. */
 #cmakedefine HAVE_FREEADDRINFO 1
 
+/* Define to 1 if you have the fseeko function. */
+#cmakedefine HAVE_FSEEKO 1
+
+/* Define to 1 if you have the _fseeki64 function. */
+#cmakedefine HAVE__FSEEKI64 1
+
 /* Define to 1 if you have the ftruncate function. */
 #cmakedefine HAVE_FTRUNCATE 1
 
@@ -231,9 +243,6 @@
 /* Define to 1 if you have the `getpass_r' function. */
 #cmakedefine HAVE_GETPASS_R 1
 
-/* Define to 1 if you have the `getppid' function. */
-#cmakedefine HAVE_GETPPID 1
-
 /* Define to 1 if you have the `getpeername' function. */
 #cmakedefine HAVE_GETPEERNAME 1
 
@@ -421,9 +430,15 @@
 /* Define to 1 if you have the select function. */
 #cmakedefine HAVE_SELECT 1
 
+/* Define to 1 if you have the sched_yield function. */
+#cmakedefine HAVE_SCHED_YIELD 1
+
 /* Define to 1 if you have the send function. */
 #cmakedefine HAVE_SEND 1
 
+/* Define to 1 if you have the sendmsg function. */
+#cmakedefine HAVE_SENDMSG 1
+
 /* Define to 1 if you have the 'fsetxattr' function. */
 #cmakedefine HAVE_FSETXATTR 1
 
@@ -458,7 +473,7 @@
 #cmakedefine HAVE_SIGSETJMP 1
 
 /* Define to 1 if you have the `snprintf' function. */
-#cmakedefine HAVE_SNPRINTF
+#cmakedefine HAVE_SNPRINTF 1
 
 /* Define to 1 if struct sockaddr_in6 has the sin6_scope_id member */
 #cmakedefine HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID 1
@@ -646,6 +661,9 @@ ${SIZEOF_OFF_T_CODE}
 /* The size of `curl_off_t', as computed by sizeof. */
 ${SIZEOF_CURL_OFF_T_CODE}
 
+/* The size of `curl_socket_t', as computed by sizeof. */
+${SIZEOF_CURL_SOCKET_T_CODE}
+
 /* The size of `size_t', as computed by sizeof. */
 ${SIZEOF_SIZE_T_CODE}
 
@@ -720,7 +738,7 @@ ${SIZEOF_TIME_T_CODE}
 #cmakedefine USE_MSH3 1
 
 /* if Unix domain sockets are enabled  */
-#cmakedefine USE_UNIX_SOCKETS
+#cmakedefine USE_UNIX_SOCKETS 1
 
 /* Define to 1 if you are building a Windows target with large file support. */
 #cmakedefine USE_WIN32_LARGE_FILES 1