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FATAL_EXIT_CODE ¶A C expression for the status code to be returned when the compilerexits after serious errors. The default is the system-provided macro‘EXIT_FAILURE’, or ‘1’ if the system doesn’t define thatmacro. Define this macro only if these defaults are incorrect.
SUCCESS_EXIT_CODE ¶A C expression for the status code to be returned when the compilerexits without serious errors. (Warnings are not serious errors.) Thedefault is the system-provided macro ‘EXIT_SUCCESS’, or ‘0’ ifthe system doesn’t define that macro. Define this macro only if thesedefaults are incorrect.
USE_C_ALLOCA ¶Define this macro if GCC should use the C implementation ofallocaprovided bylibiberty.a. This only affects how some parts of thecompiler itself allocate memory. It does not change code generation.
When GCC is built with a compiler other than itself, the Callocais always used. This is because most other implementations have seriousbugs. You should define this macro only on a system where nostack-basedalloca can possibly work. For instance, if a systemhas a small limit on the size of the stack, GCC’s builtinallocawill not work reliably.
COLLECT2_HOST_INITIALIZATION ¶If defined, a C statement (sans semicolon) that performs host-dependentinitialization whencollect2 is being initialized.
GCC_DRIVER_HOST_INITIALIZATION ¶If defined, a C statement (sans semicolon) that performs host-dependentinitialization when a compilation driver is being initialized.
HOST_LONG_LONG_FORMAT ¶If defined, the string used to indicate an argument of typelonglong to functions likeprintf. The default value is"ll".
HOST_LONG_FORMAT ¶If defined, the string used to indicate an argument of typelongto functions likeprintf. The default value is"l".
HOST_PTR_PRINTF ¶If defined, the string used to indicate an argument of typevoid *to functions likeprintf. The default value is"%p".
In addition, ifconfigure generates an incorrect definition ofany of the macros inauto-host.h, you can override thatdefinition in a host configuration header. If you need to do this,first see if it is possible to fixconfigure.
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