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| <title>Using the GNU Compiler Collection (GCC): Solaris 2 Options</title> |
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| <h4 class="subsection">3.17.43 Solaris 2 Options</h4> |
| <a name="index-Solaris-2-options"></a> |
| |
| <p>These ‘<samp>-m</samp>’ options are supported on Solaris 2: |
| </p> |
| <dl compact="compact"> |
| <dt><code>-mclear-hwcap</code></dt> |
| <dd><a name="index-mclear_002dhwcap"></a> |
| <p><samp>-mclear-hwcap</samp> tells the compiler to remove the hardware |
| capabilities generated by the Solaris assembler. This is only necessary |
| when object files use ISA extensions not supported by the current |
| machine, but check at runtime whether or not to use them. |
| </p> |
| </dd> |
| <dt><code>-mimpure-text</code></dt> |
| <dd><a name="index-mimpure_002dtext"></a> |
| <p><samp>-mimpure-text</samp>, used in addition to <samp>-shared</samp>, tells |
| the compiler to not pass <samp>-z text</samp> to the linker when linking a |
| shared object. Using this option, you can link position-dependent |
| code into a shared object. |
| </p> |
| <p><samp>-mimpure-text</samp> suppresses the “relocations remain against |
| allocatable but non-writable sections” linker error message. |
| However, the necessary relocations trigger copy-on-write, and the |
| shared object is not actually shared across processes. Instead of |
| using <samp>-mimpure-text</samp>, you should compile all source code with |
| <samp>-fpic</samp> or <samp>-fPIC</samp>. |
| </p> |
| </dd> |
| </dl> |
| |
| <p>These switches are supported in addition to the above on Solaris 2: |
| </p> |
| <dl compact="compact"> |
| <dt><code>-pthreads</code></dt> |
| <dd><a name="index-pthreads"></a> |
| <p>Add support for multithreading using the POSIX threads library. This |
| option sets flags for both the preprocessor and linker. This option does |
| not affect the thread safety of object code produced by the compiler or |
| that of libraries supplied with it. |
| </p> |
| </dd> |
| <dt><code>-pthread</code></dt> |
| <dd><a name="index-pthread-1"></a> |
| <p>This is a synonym for <samp>-pthreads</samp>. |
| </p></dd> |
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