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<TITLE>Option: intrinsic</TITLE>
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<H2>Option: <font color=#FF0080>intrinsic</font></H2><P>
<A NAME="intrinsic"></A><DT><B><A HREF="intrinsic.html">-intrinsic</A>=</B><I>list</I>

<DD>
<DL COMPACT><DT><DD>
Controls whether <B>ftnchek</B> recognizes certain nonstandard
intrinsic functions as intrinsic.
The <I>list</I> consists of keywords
separated by commas or colons.  Some of the keywords control whether
to recognize certain groups of functions, and other keywords
control the expected syntax for invoking
some nonstandard intrinsics.
Include a keyword to turn on recognition of the corresponding
set of intrinsics or to allow the corresponding syntax.  Include a
keyword prefixed by
<B>no-</B> to turn off that recognition.
<P>

There are three special keywords: <B>all</B>  turns on recognition of
all the nonstandard intrinsics (listed below) and accepts either syntax for
those that have variations.
Use <B>none</B> to turn off recognition of all nonstandard intrinsics
except those noted below.
Use <B>help</B> to print the list of all the keywords with a brief
explanation of each.
If <I>list</I> is omitted, <B><A HREF="intrinsic.html">-intrinsic</A></B> is equivalent to
<B><A HREF="intrinsic.html">-intrinsic</A>=all</B>, and <B>-nointrinsic</B> is equivalent to
<B><A HREF="intrinsic.html">-intrinsic</A>=none</B>.
<P>

The nonstandard intrinsic functions needed to support the nonstandard
extended precision data types (double complex and quad precision) are
always recognized.  The intrinsics for the double complex data type are:

<CENTER><TABLE>
<TR VALIGN=top><TD>CDABS</TD><TD>CDSQRT</TD><TD>DREAL</TD><TD>ZLOG<BR></TD></TR>
<TR VALIGN=top><TD>CDCOS</TD><TD>DCMPLX</TD><TD>IMAG</TD><TD>ZSIN<BR></TD></TR>
<TR VALIGN=top><TD>CDEXP</TD><TD>DCONJG</TD><TD>ZABS</TD><TD>ZSQRT<BR></TD></TR>
<TR VALIGN=top><TD>CDLOG</TD><TD>DIMAG</TD><TD>ZEXP</TD><TD>ZCOS<BR></TD></TR>
<TR VALIGN=top><TD>CDSIN</TD><TD></TD><TD></TD><TD><BR></TD></TR>
</TABLE></CENTER>


The intrinsics for the quad precision and quad complex types are:

<CENTER><TABLE>
<TR VALIGN=top><TD>CQABS</TD><TD>QARCOS</TD><TD>QEXT</TD><TD>QNINT<BR></TD></TR>
<TR VALIGN=top><TD>CQCOS</TD><TD>QARSIN</TD><TD>QEXTD</TD><TD>QPROD<BR></TD></TR>
<TR VALIGN=top><TD>CQEXP</TD><TD>QATAN</TD><TD>QFLOAT</TD><TD>QREAL<BR></TD></TR>
<TR VALIGN=top><TD>CQLOG</TD><TD>QATAN2</TD><TD>QIMAG</TD><TD>QSIGN<BR></TD></TR>
<TR VALIGN=top><TD>CQSIN</TD><TD>QCMPLX</TD><TD>QINT</TD><TD>QSIN<BR></TD></TR>
<TR VALIGN=top><TD>CQSQRT</TD><TD>QCONJG</TD><TD>QLOG</TD><TD>QSINH<BR></TD></TR>
<TR VALIGN=top><TD>DBLEQ</TD><TD>QCOS</TD><TD>QLOG10</TD><TD>QSQRT<BR></TD></TR>
<TR VALIGN=top><TD>IQINT</TD><TD>QCOSH</TD><TD>QMAX1</TD><TD>QTAN<BR></TD></TR>
<TR VALIGN=top><TD>IQNINT</TD><TD>QDIM</TD><TD>QMIN1</TD><TD>QTANH<BR></TD></TR>
<TR VALIGN=top><TD>QABS</TD><TD>QEXP</TD><TD>QMOD</TD><TD>SNGLQ<BR></TD></TR>
</TABLE></CENTER>


The keywords controlling recognition of other nonstandard intrinsic
functions are as follows:
<DL COMPACT>
<DT><B>extra</B>:

<DD>
recognize the following commonly available nonstandard intrinsics (all
except EXIT and LOC are defined in MIL-STD 1753):

<CENTER><TABLE>
<TR VALIGN=top><TD>BTEST</TD><TD>IBCLR</TD><TD>IEOR</TD><TD>ISHFTC<BR></TD></TR>
<TR VALIGN=top><TD>EXIT</TD><TD>IBITS</TD><TD>IOR</TD><TD>LOC<BR></TD></TR>
<TR VALIGN=top><TD>IAND</TD><TD>IBSET</TD><TD>ISHFT</TD><TD>NOT<BR></TD></TR>
</TABLE></CENTER>


<DT><B>unix</B>:

<DD>
recognize these common Unix-specific intrinsic functions:

<CENTER><TABLE>
<TR VALIGN=top><TD>ABORT</TD><TD>GMTIME</TD><TD>LTIME</TD><TD>SRAND<BR></TD></TR>
<TR VALIGN=top><TD>AND</TD><TD>IARGC</TD><TD>OR</TD><TD>SYSTEM<BR></TD></TR>
<TR VALIGN=top><TD>GETARG</TD><TD>IRAND</TD><TD>RAND</TD><TD>TIME<BR></TD></TR>
<TR VALIGN=top><TD>GETENV</TD><TD>LSHIFT</TD><TD>RSHIFT</TD><TD>XOR<BR></TD></TR>
</TABLE></CENTER>


<DT><B>vms</B>:

<DD>
recognize these common VMS-specific intrinsic functions:

<CENTER><TABLE>
<TR VALIGN=top><TD>DATE</TD><TD>IDATE</TD><TD>SECNDS</TD><TD>TIME<BR></TD></TR>
<TR VALIGN=top><TD>ERRSNS</TD><TD>RAN</TD><TD>SIZEOF</TD><TD><BR></TD></TR>
</TABLE></CENTER>


<DT><B>iargc-no-argument</B>:

<DD>
specify that IARGC may be invoked with no arguments.
<DT><B>iargc-one-argument</B>:

<DD>
specify that IARGC may be invoked with one argument.
<DT><B>rand-no-argument</B>:

<DD>
specify that RAND and IRAND may be invoked with no
arguments.
<DT><B>rand-one-argument</B>:

<DD>
specify that RAND and IRAND may be invoked with one
argument.
</DL>
<P>

The <B>no-argument</B> and <B>one-argument</B> keywords work as
follows: turning the option on causes <B>ftnchek</B> to accept the
corresponding syntax for invocation of the function, without excluding
the possibility of the alternative syntax.  Turning the option off
causes the corresponding syntax not to be accepted.  If both options
are turned on at once (the default), then either syntax is accepted.
Turning both options off at once would not be meaningful.
These options have no effect if recognition of Unix intrinsics has
been turned off.
<P>

Note that this setting does not control whether non-standard warnings
are issued about these functions.  It controls whether the
functions are assumed to be intrinsic or not, which determines how their
usage is checked.  When functions in any of these sets are
included, their invocations will be checked according to the rules
for the intrinsic functions; otherwise they will be checked as normal
(user-written) external functions.  The non-standard warnings
are controlled by the <B><A HREF="f77.html">-f77</A>=intrinsic</B> option.
<P>

The default value of this setting is equivalent to
<B><A HREF="intrinsic.html">-intrinsic</A>=all</B> followed by <B><A HREF="intrinsic.html">-intrinsic</A>=no-vms</B> for the
Unix version, <B><A HREF="intrinsic.html">-intrinsic</A>=no-unix</B> for the VMS version,
and <B><A HREF="intrinsic.html">-intrinsic</A>=no-unix,no-vms</B> for other versions.
<P>

Note: In versions of <B>ftnchek</B> prior to 2.10, the
<B><A HREF="intrinsic.html">-intrinsic</A></B> flag took a numeric argument instead of a list of
options.
For the sake of users who may have written scripts invoking
<B>ftnchek</B> in this way, the numeric form is still
accepted.  The numeric form of the setting consists of three digits.
The
ones digit selects the set of intrinsic functions to be supported.
The digit 0 selects only Fortran 77 standard intrinsics plus those needed to
support the nonstandard extended precision data types.  The digit 1 is
equivalent to <B>extra</B>, 2 is
equivalent to <B>extra,unix</B>, and 3 is equivalent to
<B>extra,vms</B>.
The tens digit of this setting controls the syntax of the RAND
intrinsic function, and the hundreds
digit controls the syntax of the IARGC function.
For these digits,
specify 0 to require invocation with no argument,
1 to require one argument, and 2 to allow either form.
<P>

See also: <B><A HREF="f77.html">-f77</A></B>.
</DL>

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