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This is a description of C preprocessor defines that readline accepts.
Most are passed in from the parent `make'; e.g. from the bash source
directory.
NO_SYS_FILE <sys/file.h> is not present
HAVE_UNISTD_H <unistd.h> exists
HAVE_STDLIB_H <stdlib.h> exists
HAVE_VARARGS_H <varargs.h> exists and is usable
HAVE_STRING_H <string.h> exists
HAVE_ALLOCA_H <alloca.h> exists and is needed for alloca()
HAVE_ALLOCA alloca(3) or a define for it exists
PRAGMA_ALLOCA use of alloca() requires a #pragma, as in AIX 3.x
VOID_SIGHANDLER signal handlers are void functions
HAVE_DIRENT_H <dirent.h> exists and is usable
HAVE_SYS_PTEM_H <sys/ptem.h> exists
HAVE_SYS_PTE_H <sys/pte.h> exists
HAVE_SYS_STREAM_H <sys/stream.h> exists
HAVE_SYS_SELECT_H <sys/select.h> exists
System-specific options:
GWINSZ_IN_SYS_IOCTL need to include <sys/ioctl.h> for TIOCGWINSZ
HAVE_GETPW_DECLS the getpw* functions are declared in <pwd.h> and cannot
be redeclared without compiler errors
HAVE_STRCASECMP the strcasecmp and strncasecmp functions are available
USG Running a variant of System V
USGr3 Running System V.3
XENIX_22 Xenix 2.2
Linux Linux
CRAY running a recent version of Cray UNICOS
SunOS4 Running SunOS 4.x
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