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Changes to existing code:
* Make explicit comparison against NULL.
* Adjust debug message for readability.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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Rename the file to match the header it implements functions from.
Changes to existing code:
* Fix the return value from backtrace (off by one).
* Use __builtin_extract_return_addr as recommended in gcc documentation.
* Document header usage.
* Document where the functions are referenced in the LSB standard.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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* Remove -DPIC as it is unused (and PIC is always enabled).
* Export the loader name as a macro (this will be used in the future).
* Enable compiler warnings, except the expected ones.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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* Prefer providing the underscore-prefixed symbol as the strong
definition.
* Do not use a weak alias if the alias is also underscore-prefixed.
* Make libgcompat objects depend on the new header.
[NOTE: I originally took the weak_alias macro from musl's libc.h, but
it's trivial and the same pattern already in use. If desired, I
can add the musl copyright notice.]
Signed-off-by: Samuel Holland <samuel@sholland.org>
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The settings here are based on the current code style documentation.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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On GCC 4.9.4, at least backtrace.c fails to compile because of variable
declaration in a for statement, which requires -std=c99 or -std=c11.
Since we are using ISO C mode instead of a GNU standard, we additionally
must define _BSD_SOURCE to expose Dl_info for the dl code.
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