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231 lines
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HTML
4 years ago
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<title>HPPA Options - Using the GNU Compiler Collection (GCC)</title>
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<meta name="description" content="Using the GNU Compiler Collection (GCC)">
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<link rel="up" href="Submodel-Options.html#Submodel-Options" title="Submodel Options">
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<link rel="prev" href="H8_002f300-Options.html#H8_002f300-Options" title="H8/300 Options">
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<link rel="next" href="IA_002d64-Options.html#IA_002d64-Options" title="IA-64 Options">
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Copyright (C) 1988-2015 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being ``Funding Free Software'', the Front-Cover
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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</head>
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<body>
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<div class="node">
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<a name="HPPA-Options"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="IA_002d64-Options.html#IA_002d64-Options">IA-64 Options</a>,
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Previous: <a rel="previous" accesskey="p" href="H8_002f300-Options.html#H8_002f300-Options">H8/300 Options</a>,
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Up: <a rel="up" accesskey="u" href="Submodel-Options.html#Submodel-Options">Submodel Options</a>
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<hr>
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</div>
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<h4 class="subsection">3.17.16 HPPA Options</h4>
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<p><a name="index-HPPA-Options-1699"></a>
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These ‘<samp><span class="samp">-m</span></samp>’ options are defined for the HPPA family of computers:
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<dl>
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<dt><code>-march=</code><var>architecture-type</var><dd><a name="index-march-1700"></a>Generate code for the specified architecture. The choices for
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<var>architecture-type</var> are ‘<samp><span class="samp">1.0</span></samp>’ for PA 1.0, ‘<samp><span class="samp">1.1</span></samp>’ for PA
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1.1, and ‘<samp><span class="samp">2.0</span></samp>’ for PA 2.0 processors. Refer to
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<samp><span class="file">/usr/lib/sched.models</span></samp> on an HP-UX system to determine the proper
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architecture option for your machine. Code compiled for lower numbered
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architectures runs on higher numbered architectures, but not the
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other way around.
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<br><dt><code>-mpa-risc-1-0</code><dt><code>-mpa-risc-1-1</code><dt><code>-mpa-risc-2-0</code><dd><a name="index-mpa_002drisc_002d1_002d0-1701"></a><a name="index-mpa_002drisc_002d1_002d1-1702"></a><a name="index-mpa_002drisc_002d2_002d0-1703"></a>Synonyms for <samp><span class="option">-march=1.0</span></samp>, <samp><span class="option">-march=1.1</span></samp>, and <samp><span class="option">-march=2.0</span></samp> respectively.
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<br><dt><code>-mjump-in-delay</code><dd><a name="index-mjump_002din_002ddelay-1704"></a>This option is ignored and provided for compatibility purposes only.
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<br><dt><code>-mdisable-fpregs</code><dd><a name="index-mdisable_002dfpregs-1705"></a>Prevent floating-point registers from being used in any manner. This is
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necessary for compiling kernels that perform lazy context switching of
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floating-point registers. If you use this option and attempt to perform
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floating-point operations, the compiler aborts.
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<br><dt><code>-mdisable-indexing</code><dd><a name="index-mdisable_002dindexing-1706"></a>Prevent the compiler from using indexing address modes. This avoids some
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rather obscure problems when compiling MIG generated code under MACH.
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<br><dt><code>-mno-space-regs</code><dd><a name="index-mno_002dspace_002dregs-1707"></a>Generate code that assumes the target has no space registers. This allows
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GCC to generate faster indirect calls and use unscaled index address modes.
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<p>Such code is suitable for level 0 PA systems and kernels.
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<br><dt><code>-mfast-indirect-calls</code><dd><a name="index-mfast_002dindirect_002dcalls-1708"></a>Generate code that assumes calls never cross space boundaries. This
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allows GCC to emit code that performs faster indirect calls.
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<p>This option does not work in the presence of shared libraries or nested
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functions.
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<br><dt><code>-mfixed-range=</code><var>register-range</var><dd><a name="index-mfixed_002drange-1709"></a>Generate code treating the given register range as fixed registers.
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A fixed register is one that the register allocator cannot use. This is
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useful when compiling kernel code. A register range is specified as
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two registers separated by a dash. Multiple register ranges can be
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specified separated by a comma.
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<br><dt><code>-mlong-load-store</code><dd><a name="index-mlong_002dload_002dstore-1710"></a>Generate 3-instruction load and store sequences as sometimes required by
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the HP-UX 10 linker. This is equivalent to the ‘<samp><span class="samp">+k</span></samp>’ option to
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the HP compilers.
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<br><dt><code>-mportable-runtime</code><dd><a name="index-mportable_002druntime-1711"></a>Use the portable calling conventions proposed by HP for ELF systems.
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<br><dt><code>-mgas</code><dd><a name="index-mgas-1712"></a>Enable the use of assembler directives only GAS understands.
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<br><dt><code>-mschedule=</code><var>cpu-type</var><dd><a name="index-mschedule-1713"></a>Schedule code according to the constraints for the machine type
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<var>cpu-type</var>. The choices for <var>cpu-type</var> are ‘<samp><span class="samp">700</span></samp>’
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‘<samp><span class="samp">7100</span></samp>’, ‘<samp><span class="samp">7100LC</span></samp>’, ‘<samp><span class="samp">7200</span></samp>’, ‘<samp><span class="samp">7300</span></samp>’ and ‘<samp><span class="samp">8000</span></samp>’. Refer
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to <samp><span class="file">/usr/lib/sched.models</span></samp> on an HP-UX system to determine the
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proper scheduling option for your machine. The default scheduling is
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‘<samp><span class="samp">8000</span></samp>’.
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<br><dt><code>-mlinker-opt</code><dd><a name="index-mlinker_002dopt-1714"></a>Enable the optimization pass in the HP-UX linker. Note this makes symbolic
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debugging impossible. It also triggers a bug in the HP-UX 8 and HP-UX 9
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linkers in which they give bogus error messages when linking some programs.
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<br><dt><code>-msoft-float</code><dd><a name="index-msoft_002dfloat-1715"></a>Generate output containing library calls for floating point.
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<strong>Warning:</strong> the requisite libraries are not available for all HPPA
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targets. Normally the facilities of the machine's usual C compiler are
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used, but this cannot be done directly in cross-compilation. You must make
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your own arrangements to provide suitable library functions for
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cross-compilation.
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<p><samp><span class="option">-msoft-float</span></samp> changes the calling convention in the output file;
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therefore, it is only useful if you compile <em>all</em> of a program with
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this option. In particular, you need to compile <samp><span class="file">libgcc.a</span></samp>, the
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library that comes with GCC, with <samp><span class="option">-msoft-float</span></samp> in order for
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this to work.
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<br><dt><code>-msio</code><dd><a name="index-msio-1716"></a>Generate the predefine, <code>_SIO</code>, for server IO. The default is
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<samp><span class="option">-mwsio</span></samp>. This generates the predefines, <code>__hp9000s700</code>,
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<code>__hp9000s700__</code> and <code>_WSIO</code>, for workstation IO. These
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options are available under HP-UX and HI-UX.
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<br><dt><code>-mgnu-ld</code><dd><a name="index-mgnu_002dld-1717"></a>Use options specific to GNU <samp><span class="command">ld</span></samp>.
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This passes <samp><span class="option">-shared</span></samp> to <samp><span class="command">ld</span></samp> when
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building a shared library. It is the default when GCC is configured,
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explicitly or implicitly, with the GNU linker. This option does not
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affect which <samp><span class="command">ld</span></samp> is called; it only changes what parameters
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are passed to that <samp><span class="command">ld</span></samp>.
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The <samp><span class="command">ld</span></samp> that is called is determined by the
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<samp><span class="option">--with-ld</span></samp> configure option, GCC's program search path, and
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finally by the user's <samp><span class="env">PATH</span></samp>. The linker used by GCC can be printed
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using ‘<samp><span class="samp">which `gcc -print-prog-name=ld`</span></samp>’. This option is only available
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on the 64-bit HP-UX GCC, i.e. configured with ‘<samp><span class="samp">hppa*64*-*-hpux*</span></samp>’.
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<br><dt><code>-mhp-ld</code><dd><a name="index-mhp_002dld-1718"></a>Use options specific to HP <samp><span class="command">ld</span></samp>.
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This passes <samp><span class="option">-b</span></samp> to <samp><span class="command">ld</span></samp> when building
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a shared library and passes <samp><span class="option">+Accept TypeMismatch</span></samp> to <samp><span class="command">ld</span></samp> on all
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links. It is the default when GCC is configured, explicitly or
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implicitly, with the HP linker. This option does not affect
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which <samp><span class="command">ld</span></samp> is called; it only changes what parameters are passed to that
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<samp><span class="command">ld</span></samp>.
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The <samp><span class="command">ld</span></samp> that is called is determined by the <samp><span class="option">--with-ld</span></samp>
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configure option, GCC's program search path, and finally by the user's
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<samp><span class="env">PATH</span></samp>. The linker used by GCC can be printed using ‘<samp><span class="samp">which
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`gcc -print-prog-name=ld`</span></samp>’. This option is only available on the 64-bit
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HP-UX GCC, i.e. configured with ‘<samp><span class="samp">hppa*64*-*-hpux*</span></samp>’.
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<br><dt><code>-mlong-calls</code><dd><a name="index-mno_002dlong_002dcalls-1719"></a>Generate code that uses long call sequences. This ensures that a call
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is always able to reach linker generated stubs. The default is to generate
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long calls only when the distance from the call site to the beginning
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of the function or translation unit, as the case may be, exceeds a
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predefined limit set by the branch type being used. The limits for
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normal calls are 7,600,000 and 240,000 bytes, respectively for the
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PA 2.0 and PA 1.X architectures. Sibcalls are always limited at
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240,000 bytes.
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<p>Distances are measured from the beginning of functions when using the
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<samp><span class="option">-ffunction-sections</span></samp> option, or when using the <samp><span class="option">-mgas</span></samp>
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and <samp><span class="option">-mno-portable-runtime</span></samp> options together under HP-UX with
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the SOM linker.
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<p>It is normally not desirable to use this option as it degrades
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performance. However, it may be useful in large applications,
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particularly when partial linking is used to build the application.
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<p>The types of long calls used depends on the capabilities of the
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assembler and linker, and the type of code being generated. The
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impact on systems that support long absolute calls, and long pic
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symbol-difference or pc-relative calls should be relatively small.
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However, an indirect call is used on 32-bit ELF systems in pic code
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and it is quite long.
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<br><dt><code>-munix=</code><var>unix-std</var><dd><a name="index-march-1720"></a>Generate compiler predefines and select a startfile for the specified
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UNIX standard. The choices for <var>unix-std</var> are ‘<samp><span class="samp">93</span></samp>’, ‘<samp><span class="samp">95</span></samp>’
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and ‘<samp><span class="samp">98</span></samp>’. ‘<samp><span class="samp">93</span></samp>’ is supported on all HP-UX versions. ‘<samp><span class="samp">95</span></samp>’
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is available on HP-UX 10.10 and later. ‘<samp><span class="samp">98</span></samp>’ is available on HP-UX
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11.11 and later. The default values are ‘<samp><span class="samp">93</span></samp>’ for HP-UX 10.00,
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‘<samp><span class="samp">95</span></samp>’ for HP-UX 10.10 though to 11.00, and ‘<samp><span class="samp">98</span></samp>’ for HP-UX 11.11
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and later.
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<p><samp><span class="option">-munix=93</span></samp> provides the same predefines as GCC 3.3 and 3.4.
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<samp><span class="option">-munix=95</span></samp> provides additional predefines for <code>XOPEN_UNIX</code>
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and <code>_XOPEN_SOURCE_EXTENDED</code>, and the startfile <samp><span class="file">unix95.o</span></samp>.
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<samp><span class="option">-munix=98</span></samp> provides additional predefines for <code>_XOPEN_UNIX</code>,
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<code>_XOPEN_SOURCE_EXTENDED</code>, <code>_INCLUDE__STDC_A1_SOURCE</code> and
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<code>_INCLUDE_XOPEN_SOURCE_500</code>, and the startfile <samp><span class="file">unix98.o</span></samp>.
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<p>It is <em>important</em> to note that this option changes the interfaces
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for various library routines. It also affects the operational behavior
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of the C library. Thus, <em>extreme</em> care is needed in using this
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option.
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<p>Library code that is intended to operate with more than one UNIX
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standard must test, set and restore the variable <code>__xpg4_extended_mask</code>
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as appropriate. Most GNU software doesn't provide this capability.
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<br><dt><code>-nolibdld</code><dd><a name="index-nolibdld-1721"></a>Suppress the generation of link options to search libdld.sl when the
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<samp><span class="option">-static</span></samp> option is specified on HP-UX 10 and later.
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<br><dt><code>-static</code><dd><a name="index-static-1722"></a>The HP-UX implementation of setlocale in libc has a dependency on
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libdld.sl. There isn't an archive version of libdld.sl. Thus,
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when the <samp><span class="option">-static</span></samp> option is specified, special link options
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are needed to resolve this dependency.
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<p>On HP-UX 10 and later, the GCC driver adds the necessary options to
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link with libdld.sl when the <samp><span class="option">-static</span></samp> option is specified.
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This causes the resulting binary to be dynamic. On the 64-bit port,
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the linkers generate dynamic binaries by default in any case. The
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<samp><span class="option">-nolibdld</span></samp> option can be used to prevent the GCC driver from
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adding these link options.
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<br><dt><code>-threads</code><dd><a name="index-threads-1723"></a>Add support for multithreading with the <dfn>dce thread</dfn> library
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under HP-UX. This option sets flags for both the preprocessor and
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linker.
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</dl>
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</body></html>
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