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stdio: Remove the usage of $(fno-unit-at-a-time) for errlist.c

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The errlist.c is built with -fno-toplevel-reorder to avoid compiler to
reorder the compat assembly directives due an assembler issue [1]
(fixed on 2.39).

This patch removes the compiler flags by split the compat symbol
generation in two phases.  First the _sys_errlist_internal internal
without any compat symbol directive is preprocessed to generate an
assembly source code.  This generate assembly is then used as input
on a platform agnostic errlist-data.S which then creates the compat
definitions.  This prevents compiler to move any compat directive
prior the _sys_errlist_internal definition itself.

Checked on a make check run-built-tests=no on all affected ABIs.

[1] https://sourceware.org/bugzilla/show_bug.cgi?id=29012
This commit is contained in:
Adhemerval Zanella
2022-04-06 12:09:42 -03:00
parent 111254f3e1
commit 900fa25736
16 changed files with 120 additions and 33 deletions
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7
stdio-common/errlist-data.S Normal file
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@@ -0,0 +1,7 @@
#ifdef SHARED
# include "errlist-data-aux-shared.S"
#else
# include "errlist-data-aux.S"
#endif
#include <errlist-compat-data.h>