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Difference between revisions of "Newlib Library"
Steven Solie (talk | contribs) (Created page with "= Newlib Library = The built-in AmigaOS C library is a variant of the [http://sourceware.org/newlib/ Newlib C standard library] implementation. This section describes feature...") |
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Newlib is a rather unique in that is uses a shared interface pointer name INewlib (struct Interface* type). This is only a concern when you are not using the standard C startup code and opening newlib.library directly. One consequence of using a shared interface pointer is that you must specify the NP_Child tag when using IDOS->CreateNewProc() if you child process is to share the parent process' newlib context information (e.g. stdin, stdout and stderr). |
Newlib is a rather unique in that is uses a shared interface pointer name INewlib (struct Interface* type). This is only a concern when you are not using the standard C startup code and opening newlib.library directly. One consequence of using a shared interface pointer is that you must specify the NP_Child tag when using IDOS->CreateNewProc() if you child process is to share the parent process' newlib context information (e.g. stdin, stdout and stderr). |
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| + | == Startup Code == |
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| + | The standard C startup code provides information on whether your application was launched from Workbench or the Shell console. Your program always starts using the standard '''argc''' and '''argv''' parameters: |
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| + | <syntaxhighlight> |
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| + | int main(int argc, char **argv) |
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| + | </syntaxhighlight> |
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| + | If '''argc''' is equal to zero that means the application was started from the Workbench. In this case, the '''argv''' parameter is a pointer to a struct WBStartup. |
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| + | |||
| + | If '''argc''' is non-zero then it means the application was started from the Shell console and the normal C startup rules apply. |
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Revision as of 06:29, 8 March 2013
Newlib Library
The built-in AmigaOS C library is a variant of the Newlib C standard library implementation. This section describes features of Newlib which are unique to AmigaOS.
Newlib is a rather unique in that is uses a shared interface pointer name INewlib (struct Interface* type). This is only a concern when you are not using the standard C startup code and opening newlib.library directly. One consequence of using a shared interface pointer is that you must specify the NP_Child tag when using IDOS->CreateNewProc() if you child process is to share the parent process' newlib context information (e.g. stdin, stdout and stderr).
Startup Code
The standard C startup code provides information on whether your application was launched from Workbench or the Shell console. Your program always starts using the standard argc and argv parameters:
int main(int argc, char **argv)
If argc is equal to zero that means the application was started from the Workbench. In this case, the argv parameter is a pointer to a struct WBStartup.
If argc is non-zero then it means the application was started from the Shell console and the normal C startup rules apply.
