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| <h4 class="subsection">3.17.14 HPPA Options</h4> |
| |
| <p><a name="index-HPPA-Options-1271"></a> |
| These ‘<samp><span class="samp">-m</span></samp>’ options are defined for the HPPA family of computers: |
| |
| <dl> |
| <dt><code>-march=</code><var>architecture-type</var><dd><a name="index-march-1272"></a>Generate code for the specified architecture. The choices for |
| <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 |
| 1.1, and ‘<samp><span class="samp">2.0</span></samp>’ for PA 2.0 processors. Refer to |
| <samp><span class="file">/usr/lib/sched.models</span></samp> on an HP-UX system to determine the proper |
| architecture option for your machine. Code compiled for lower numbered |
| architectures will run on higher numbered architectures, but not the |
| other way around. |
| |
| <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_002d0-1273"></a><a name="index-mpa_002drisc_002d1_002d1-1274"></a><a name="index-mpa_002drisc_002d2_002d0-1275"></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. |
| |
| <br><dt><code>-mbig-switch</code><dd><a name="index-mbig_002dswitch-1276"></a>Generate code suitable for big switch tables. Use this option only if |
| the assembler/linker complain about out of range branches within a switch |
| table. |
| |
| <br><dt><code>-mjump-in-delay</code><dd><a name="index-mjump_002din_002ddelay-1277"></a>Fill delay slots of function calls with unconditional jump instructions |
| by modifying the return pointer for the function call to be the target |
| of the conditional jump. |
| |
| <br><dt><code>-mdisable-fpregs</code><dd><a name="index-mdisable_002dfpregs-1278"></a>Prevent floating point registers from being used in any manner. This is |
| necessary for compiling kernels which perform lazy context switching of |
| floating point registers. If you use this option and attempt to perform |
| floating point operations, the compiler will abort. |
| |
| <br><dt><code>-mdisable-indexing</code><dd><a name="index-mdisable_002dindexing-1279"></a>Prevent the compiler from using indexing address modes. This avoids some |
| rather obscure problems when compiling MIG generated code under MACH. |
| |
| <br><dt><code>-mno-space-regs</code><dd><a name="index-mno_002dspace_002dregs-1280"></a>Generate code that assumes the target has no space registers. This allows |
| GCC to generate faster indirect calls and use unscaled index address modes. |
| |
| <p>Such code is suitable for level 0 PA systems and kernels. |
| |
| <br><dt><code>-mfast-indirect-calls</code><dd><a name="index-mfast_002dindirect_002dcalls-1281"></a>Generate code that assumes calls never cross space boundaries. This |
| allows GCC to emit code which performs faster indirect calls. |
| |
| <p>This option will not work in the presence of shared libraries or nested |
| functions. |
| |
| <br><dt><code>-mfixed-range=</code><var>register-range</var><dd><a name="index-mfixed_002drange-1282"></a>Generate code treating the given register range as fixed registers. |
| A fixed register is one that the register allocator can not use. This is |
| useful when compiling kernel code. A register range is specified as |
| two registers separated by a dash. Multiple register ranges can be |
| specified separated by a comma. |
| |
| <br><dt><code>-mlong-load-store</code><dd><a name="index-mlong_002dload_002dstore-1283"></a>Generate 3-instruction load and store sequences as sometimes required by |
| the HP-UX 10 linker. This is equivalent to the ‘<samp><span class="samp">+k</span></samp>’ option to |
| the HP compilers. |
| |
| <br><dt><code>-mportable-runtime</code><dd><a name="index-mportable_002druntime-1284"></a>Use the portable calling conventions proposed by HP for ELF systems. |
| |
| <br><dt><code>-mgas</code><dd><a name="index-mgas-1285"></a>Enable the use of assembler directives only GAS understands. |
| |
| <br><dt><code>-mschedule=</code><var>cpu-type</var><dd><a name="index-mschedule-1286"></a>Schedule code according to the constraints for the machine type |
| <var>cpu-type</var>. The choices for <var>cpu-type</var> are ‘<samp><span class="samp">700</span></samp>’ |
| ‘<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 |
| to <samp><span class="file">/usr/lib/sched.models</span></samp> on an HP-UX system to determine the |
| proper scheduling option for your machine. The default scheduling is |
| ‘<samp><span class="samp">8000</span></samp>’. |
| |
| <br><dt><code>-mlinker-opt</code><dd><a name="index-mlinker_002dopt-1287"></a>Enable the optimization pass in the HP-UX linker. Note this makes symbolic |
| debugging impossible. It also triggers a bug in the HP-UX 8 and HP-UX 9 |
| linkers in which they give bogus error messages when linking some programs. |
| |
| <br><dt><code>-msoft-float</code><dd><a name="index-msoft_002dfloat-1288"></a>Generate output containing library calls for floating point. |
| <strong>Warning:</strong> the requisite libraries are not available for all HPPA |
| targets. Normally the facilities of the machine's usual C compiler are |
| used, but this cannot be done directly in cross-compilation. You must make |
| your own arrangements to provide suitable library functions for |
| cross-compilation. |
| |
| <p><samp><span class="option">-msoft-float</span></samp> changes the calling convention in the output file; |
| therefore, it is only useful if you compile <em>all</em> of a program with |
| this option. In particular, you need to compile <samp><span class="file">libgcc.a</span></samp>, the |
| library that comes with GCC, with <samp><span class="option">-msoft-float</span></samp> in order for |
| this to work. |
| |
| <br><dt><code>-msio</code><dd><a name="index-msio-1289"></a>Generate the predefine, <code>_SIO</code>, for server IO. The default is |
| <samp><span class="option">-mwsio</span></samp>. This generates the predefines, <code>__hp9000s700</code>, |
| <code>__hp9000s700__</code> and <code>_WSIO</code>, for workstation IO. These |
| options are available under HP-UX and HI-UX. |
| |
| <br><dt><code>-mgnu-ld</code><dd><a name="index-mgnu_002dld-1290"></a>Use GNU ld specific options. This passes <samp><span class="option">-shared</span></samp> to ld when |
| building a shared library. It is the default when GCC is configured, |
| explicitly or implicitly, with the GNU linker. This option does not |
| have any affect on which ld is called, it only changes what parameters |
| are passed to that ld. The ld that is called is determined by the |
| <samp><span class="option">--with-ld</span></samp> configure option, GCC's program search path, and |
| finally by the user's <samp><span class="env">PATH</span></samp>. The linker used by GCC can be printed |
| using ‘<samp><span class="samp">which `gcc -print-prog-name=ld`</span></samp>’. This option is only available |
| on the 64 bit HP-UX GCC, i.e. configured with ‘<samp><span class="samp">hppa*64*-*-hpux*</span></samp>’. |
| |
| <br><dt><code>-mhp-ld</code><dd><a name="index-mhp_002dld-1291"></a>Use HP ld specific options. This passes <samp><span class="option">-b</span></samp> to ld when building |
| a shared library and passes <samp><span class="option">+Accept TypeMismatch</span></samp> to ld on all |
| links. It is the default when GCC is configured, explicitly or |
| implicitly, with the HP linker. This option does not have any affect on |
| which ld is called, it only changes what parameters are passed to that |
| ld. The ld that is called is determined by the <samp><span class="option">--with-ld</span></samp> |
| configure option, GCC's program search path, and finally by the user's |
| <samp><span class="env">PATH</span></samp>. The linker used by GCC can be printed using ‘<samp><span class="samp">which |
| `gcc -print-prog-name=ld`</span></samp>’. This option is only available on the 64 bit |
| HP-UX GCC, i.e. configured with ‘<samp><span class="samp">hppa*64*-*-hpux*</span></samp>’. |
| |
| <br><dt><code>-mlong-calls</code><dd><a name="index-mno_002dlong_002dcalls-1292"></a>Generate code that uses long call sequences. This ensures that a call |
| is always able to reach linker generated stubs. The default is to generate |
| long calls only when the distance from the call site to the beginning |
| of the function or translation unit, as the case may be, exceeds a |
| predefined limit set by the branch type being used. The limits for |
| normal calls are 7,600,000 and 240,000 bytes, respectively for the |
| PA 2.0 and PA 1.X architectures. Sibcalls are always limited at |
| 240,000 bytes. |
| |
| <p>Distances are measured from the beginning of functions when using the |
| <samp><span class="option">-ffunction-sections</span></samp> option, or when using the <samp><span class="option">-mgas</span></samp> |
| and <samp><span class="option">-mno-portable-runtime</span></samp> options together under HP-UX with |
| the SOM linker. |
| |
| <p>It is normally not desirable to use this option as it will degrade |
| performance. However, it may be useful in large applications, |
| particularly when partial linking is used to build the application. |
| |
| <p>The types of long calls used depends on the capabilities of the |
| assembler and linker, and the type of code being generated. The |
| impact on systems that support long absolute calls, and long pic |
| symbol-difference or pc-relative calls should be relatively small. |
| However, an indirect call is used on 32-bit ELF systems in pic code |
| and it is quite long. |
| |
| <br><dt><code>-munix=</code><var>unix-std</var><dd><a name="index-march-1293"></a>Generate compiler predefines and select a startfile for the specified |
| UNIX standard. The choices for <var>unix-std</var> are ‘<samp><span class="samp">93</span></samp>’, ‘<samp><span class="samp">95</span></samp>’ |
| 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>’ |
| is available on HP-UX 10.10 and later. ‘<samp><span class="samp">98</span></samp>’ is available on HP-UX |
| 11.11 and later. The default values are ‘<samp><span class="samp">93</span></samp>’ for HP-UX 10.00, |
| ‘<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 |
| and later. |
| |
| <p><samp><span class="option">-munix=93</span></samp> provides the same predefines as GCC 3.3 and 3.4. |
| <samp><span class="option">-munix=95</span></samp> provides additional predefines for <code>XOPEN_UNIX</code> |
| and <code>_XOPEN_SOURCE_EXTENDED</code>, and the startfile <samp><span class="file">unix95.o</span></samp>. |
| <samp><span class="option">-munix=98</span></samp> provides additional predefines for <code>_XOPEN_UNIX</code>, |
| <code>_XOPEN_SOURCE_EXTENDED</code>, <code>_INCLUDE__STDC_A1_SOURCE</code> and |
| <code>_INCLUDE_XOPEN_SOURCE_500</code>, and the startfile <samp><span class="file">unix98.o</span></samp>. |
| |
| <p>It is <em>important</em> to note that this option changes the interfaces |
| for various library routines. It also affects the operational behavior |
| of the C library. Thus, <em>extreme</em> care is needed in using this |
| option. |
| |
| <p>Library code that is intended to operate with more than one UNIX |
| standard must test, set and restore the variable <var>__xpg4_extended_mask</var> |
| as appropriate. Most GNU software doesn't provide this capability. |
| |
| <br><dt><code>-nolibdld</code><dd><a name="index-nolibdld-1294"></a>Suppress the generation of link options to search libdld.sl when the |
| <samp><span class="option">-static</span></samp> option is specified on HP-UX 10 and later. |
| |
| <br><dt><code>-static</code><dd><a name="index-static-1295"></a>The HP-UX implementation of setlocale in libc has a dependency on |
| libdld.sl. There isn't an archive version of libdld.sl. Thus, |
| when the <samp><span class="option">-static</span></samp> option is specified, special link options |
| are needed to resolve this dependency. |
| |
| <p>On HP-UX 10 and later, the GCC driver adds the necessary options to |
| link with libdld.sl when the <samp><span class="option">-static</span></samp> option is specified. |
| This causes the resulting binary to be dynamic. On the 64-bit port, |
| the linkers generate dynamic binaries by default in any case. The |
| <samp><span class="option">-nolibdld</span></samp> option can be used to prevent the GCC driver from |
| adding these link options. |
| |
| <br><dt><code>-threads</code><dd><a name="index-threads-1296"></a>Add support for multithreading with the <dfn>dce thread</dfn> library |
| under HP-UX. This option sets flags for both the preprocessor and |
| linker. |
| </dl> |
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