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106 lines
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<link rel="up" href="Host-Config.html#Host-Config" title="Host Config">
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<a name="Host-Misc"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="Filesystem.html#Filesystem">Filesystem</a>,
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Up: <a rel="up" accesskey="u" href="Host-Config.html#Host-Config">Host Config</a>
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<h3 class="section">18.3 Host Misc</h3>
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<p><a name="index-configuration-file-5042"></a><a name="index-g_t_0040file_007bxm_002d_0040var_007bmachine_007d_002eh_007d-5043"></a>
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<dl>
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<dt><code>FATAL_EXIT_CODE</code><a name="index-FATAL_005fEXIT_005fCODE-5044"></a><dd>A C expression for the status code to be returned when the compiler
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exits after serious errors. The default is the system-provided macro
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‘<samp><span class="samp">EXIT_FAILURE</span></samp>’, or ‘<samp><span class="samp">1</span></samp>’ if the system doesn't define that
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macro. Define this macro only if these defaults are incorrect.
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<br><dt><code>SUCCESS_EXIT_CODE</code><a name="index-SUCCESS_005fEXIT_005fCODE-5045"></a><dd>A C expression for the status code to be returned when the compiler
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exits without serious errors. (Warnings are not serious errors.) The
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default is the system-provided macro ‘<samp><span class="samp">EXIT_SUCCESS</span></samp>’, or ‘<samp><span class="samp">0</span></samp>’ if
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the system doesn't define that macro. Define this macro only if these
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defaults are incorrect.
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<br><dt><code>USE_C_ALLOCA</code><a name="index-USE_005fC_005fALLOCA-5046"></a><dd>Define this macro if GCC should use the C implementation of <code>alloca</code>
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provided by <samp><span class="file">libiberty.a</span></samp>. This only affects how some parts of the
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compiler itself allocate memory. It does not change code generation.
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<p>When GCC is built with a compiler other than itself, the C <code>alloca</code>
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is always used. This is because most other implementations have serious
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bugs. You should define this macro only on a system where no
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stack-based <code>alloca</code> can possibly work. For instance, if a system
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has a small limit on the size of the stack, GCC's builtin <code>alloca</code>
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will not work reliably.
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<br><dt><code>COLLECT2_HOST_INITIALIZATION</code><a name="index-COLLECT2_005fHOST_005fINITIALIZATION-5047"></a><dd>If defined, a C statement (sans semicolon) that performs host-dependent
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initialization when <code>collect2</code> is being initialized.
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<br><dt><code>GCC_DRIVER_HOST_INITIALIZATION</code><a name="index-GCC_005fDRIVER_005fHOST_005fINITIALIZATION-5048"></a><dd>If defined, a C statement (sans semicolon) that performs host-dependent
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initialization when a compilation driver is being initialized.
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<br><dt><code>HOST_LONG_LONG_FORMAT</code><a name="index-HOST_005fLONG_005fLONG_005fFORMAT-5049"></a><dd>If defined, the string used to indicate an argument of type <code>long
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long</code> to functions like <code>printf</code>. The default value is
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<code>"ll"</code>.
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<br><dt><code>HOST_LONG_FORMAT</code><a name="index-HOST_005fLONG_005fFORMAT-5050"></a><dd>If defined, the string used to indicate an argument of type <code>long</code>
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to functions like <code>printf</code>. The default value is <code>"l"</code>.
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<br><dt><code>HOST_PTR_PRINTF</code><a name="index-HOST_005fPTR_005fPRINTF-5051"></a><dd>If defined, the string used to indicate an argument of type <code>void *</code>
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to functions like <code>printf</code>. The default value is <code>"%p"</code>.
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</dl>
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<p>In addition, if <samp><span class="command">configure</span></samp> generates an incorrect definition of
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any of the macros in <samp><span class="file">auto-host.h</span></samp>, you can override that
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definition in a host configuration header. If you need to do this,
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first see if it is possible to fix <samp><span class="command">configure</span></samp>.
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