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| Previous: <a href="Filesystem.html#Filesystem" accesskey="p" rel="prev">Filesystem</a>, Up: <a href="Host-Config.html#Host-Config" accesskey="u" rel="up">Host Config</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> |
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| <a name="Host-Misc-1"></a> |
| <h3 class="section">18.3 Host Misc</h3> |
| <a name="index-configuration-file-1"></a> |
| <a name="index-xm_002dmachine_002eh-1"></a> |
| |
| <dl compact="compact"> |
| <dt><code>FATAL_EXIT_CODE</code> |
| <a name="index-FATAL_005fEXIT_005fCODE"></a> |
| </dt> |
| <dd><p>A C expression for the status code to be returned when the compiler |
| exits after serious errors. The default is the system-provided macro |
| ‘<samp>EXIT_FAILURE</samp>’, or ‘<samp>1</samp>’ if the system doesn’t define that |
| macro. Define this macro only if these defaults are incorrect. |
| </p> |
| </dd> |
| <dt><code>SUCCESS_EXIT_CODE</code> |
| <a name="index-SUCCESS_005fEXIT_005fCODE"></a> |
| </dt> |
| <dd><p>A C expression for the status code to be returned when the compiler |
| exits without serious errors. (Warnings are not serious errors.) The |
| default is the system-provided macro ‘<samp>EXIT_SUCCESS</samp>’, or ‘<samp>0</samp>’ if |
| the system doesn’t define that macro. Define this macro only if these |
| defaults are incorrect. |
| </p> |
| </dd> |
| <dt><code>USE_C_ALLOCA</code> |
| <a name="index-USE_005fC_005fALLOCA"></a> |
| </dt> |
| <dd><p>Define this macro if GCC should use the C implementation of <code>alloca</code> |
| provided by <samp>libiberty.a</samp>. This only affects how some parts of the |
| compiler itself allocate memory. It does not change code generation. |
| </p> |
| <p>When GCC is built with a compiler other than itself, the C <code>alloca</code> |
| is always used. This is because most other implementations have serious |
| bugs. You should define this macro only on a system where no |
| stack-based <code>alloca</code> can possibly work. For instance, if a system |
| has a small limit on the size of the stack, GCC’s builtin <code>alloca</code> |
| will not work reliably. |
| </p> |
| </dd> |
| <dt><code>COLLECT2_HOST_INITIALIZATION</code> |
| <a name="index-COLLECT2_005fHOST_005fINITIALIZATION"></a> |
| </dt> |
| <dd><p>If defined, a C statement (sans semicolon) that performs host-dependent |
| initialization when <code>collect2</code> is being initialized. |
| </p> |
| </dd> |
| <dt><code>GCC_DRIVER_HOST_INITIALIZATION</code> |
| <a name="index-GCC_005fDRIVER_005fHOST_005fINITIALIZATION"></a> |
| </dt> |
| <dd><p>If defined, a C statement (sans semicolon) that performs host-dependent |
| initialization when a compilation driver is being initialized. |
| </p> |
| </dd> |
| <dt><code>HOST_LONG_LONG_FORMAT</code> |
| <a name="index-HOST_005fLONG_005fLONG_005fFORMAT"></a> |
| </dt> |
| <dd><p>If defined, the string used to indicate an argument of type <code>long |
| long</code> to functions like <code>printf</code>. The default value is |
| <code>"ll"</code>. |
| </p> |
| </dd> |
| <dt><code>HOST_LONG_FORMAT</code> |
| <a name="index-HOST_005fLONG_005fFORMAT"></a> |
| </dt> |
| <dd><p>If defined, the string used to indicate an argument of type <code>long</code> |
| to functions like <code>printf</code>. The default value is <code>"l"</code>. |
| </p> |
| </dd> |
| <dt><code>HOST_PTR_PRINTF</code> |
| <a name="index-HOST_005fPTR_005fPRINTF"></a> |
| </dt> |
| <dd><p>If defined, the string used to indicate an argument of type <code>void *</code> |
| to functions like <code>printf</code>. The default value is <code>"%p"</code>. |
| </p></dd> |
| </dl> |
| |
| <p>In addition, if <code>configure</code> generates an incorrect definition of |
| any of the macros in <samp>auto-host.h</samp>, you can override that |
| definition in a host configuration header. If you need to do this, |
| first see if it is possible to fix <code>configure</code>. |
| </p> |
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