CHECK_INCLUDE_FILE("strings.h" HAVE_STRINGS_H)
CHECK_INCLUDE_FILE("string.h" HAVE_STRING_H)
CHECK_INCLUDE_FILE("ucontext.h" HAVE_UCONTEXT_H)
CHECK_INCLUDE_FILE("strings.h" HAVE_STRINGS_H)
CHECK_INCLUDE_FILE("string.h" HAVE_STRING_H)
CHECK_INCLUDE_FILE("ucontext.h" HAVE_UCONTEXT_H)