Factor in recent clean-up by MaskRay

Author: Endilll

llvm/cmake/config-ix.cmake

@@ -19,9 +19,6 @@ include(HandleLLVMStdlib)
 
 if (ANDROID OR CYGWIN OR CMAKE_SYSTEM_NAME MATCHES "AIX|DragonFly|FreeBSD|Haiku|Linux|NetBSD|OpenBSD|SunOS")
   set(HAVE_DLFCN_H 1)
-  set(HAVE_ERRNO_H 1)
-  set(HAVE_FCNTL_H 1)
-  set(HAVE_FENV_H 1)
   set(HAVE_MACH_MACH_H 0)
   set(HAVE_MALLOC_MALLOC_H 0)
   set(HAVE_PTHREAD_H 1)
@@ -32,15 +29,11 @@ if (ANDROID OR CYGWIN OR CMAKE_SYSTEM_NAME MATCHES "AIX|DragonFly|FreeBSD|Haiku|
   set(HAVE_SYS_RESOURCE_H 1)
   set(HAVE_SYS_STAT_H 1)
   set(HAVE_SYS_TIME_H 1)
-  set(HAVE_SYS_TYPES_H 1)
   set(HAVE_SYSEXITS_H 1)
   set(HAVE_TERMIOS_H 1)
   set(HAVE_UNISTD_H 1)
 elseif (APPLE)
   set(HAVE_DLFCN_H 1)
-  set(HAVE_ERRNO_H 1)
-  set(HAVE_FCNTL_H 1)
-  set(HAVE_FENV_H 1)
   set(HAVE_MACH_MACH_H 1)
   set(HAVE_MALLOC_MALLOC_H 1)
   set(HAVE_PTHREAD_H 1)
@@ -51,15 +44,11 @@ elseif (APPLE)
   set(HAVE_SYS_RESOURCE_H 1)
   set(HAVE_SYS_STAT_H 1)
   set(HAVE_SYS_TIME_H 1)
-  set(HAVE_SYS_TYPES_H 1)
   set(HAVE_SYSEXITS_H 1)
   set(HAVE_TERMIOS_H 1)
   set(HAVE_UNISTD_H 1)
 elseif (PURE_WINDOWS)
   set(HAVE_DLFCN_H 0)
-  set(HAVE_ERRNO_H 1)
-  set(HAVE_FCNTL_H 1)
-  set(HAVE_FENV_H 1)
   set(HAVE_MACH_MACH_H 0)
   set(HAVE_MALLOC_MALLOC_H 0)
   set(HAVE_PTHREAD_H 0)
@@ -70,17 +59,13 @@ elseif (PURE_WINDOWS)
   set(HAVE_SYS_RESOURCE_H 0)
   set(HAVE_SYS_STAT_H 1)
   set(HAVE_SYS_TIME_H 0)
-  set(HAVE_SYS_TYPES_H 1)
   set(HAVE_SYSEXITS_H 0)
   set(HAVE_TERMIOS_H 0)
   set(HAVE_UNISTD_H 0)
 elseif (ZOS)
   # Confirmed in
   # https://github.com/llvm/llvm-project/pull/104706#issuecomment-2297109613
   set(HAVE_DLFCN_H 1)
-  set(HAVE_ERRNO_H 1)
-  set(HAVE_FCNTL_H 1)
-  set(HAVE_FENV_H 1)
   set(HAVE_MACH_MACH_H 0)
   set(HAVE_MALLOC_MALLOC_H 0)
   set(HAVE_PTHREAD_H 1)
@@ -91,16 +76,12 @@ elseif (ZOS)
   set(HAVE_SYS_RESOURCE_H 1)
   set(HAVE_SYS_STAT_H 1)
   set(HAVE_SYS_TIME_H 1)
-  set(HAVE_SYS_TYPES_H 1)
   set(HAVE_SYSEXITS_H 0)
   set(HAVE_TERMIOS_H 1)
   set(HAVE_UNISTD_H 1)
 else()
   # Other platforms that we don't promise support for.
   check_include_file(dlfcn.h HAVE_DLFCN_H)
-  check_include_file(errno.h HAVE_ERRNO_H)
-  check_include_file(fcntl.h HAVE_FCNTL_H)
-  check_include_file(fenv.h HAVE_FENV_H)
   check_include_file(mach/mach.h HAVE_MACH_MACH_H)
   check_include_file(malloc/malloc.h HAVE_MALLOC_MALLOC_H)
   check_include_file(pthread.h HAVE_PTHREAD_H)
@@ -111,7 +92,6 @@ else()
   check_include_file(sys/resource.h HAVE_SYS_RESOURCE_H)
   check_include_file(sys/stat.h HAVE_SYS_STAT_H)
   check_include_file(sys/time.h HAVE_SYS_TIME_H)
-  check_include_file(sys/types.h HAVE_SYS_TYPES_H)
   check_include_file(sysexits.h HAVE_SYSEXITS_H)
   check_include_file(termios.h HAVE_TERMIOS_H)
   check_include_file(unistd.h HAVE_UNISTD_H)