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86005fdbf4
GCC 9 has a bug (PR90731) whereby __typeof does not correctly copy
exception specifiers[1]. Surprisingly, this can be quieted by declaring
"#pragma system_header", or if the headers are installed in a system
directory.
Work around this by using the pragma for any gcc version between
9.0 and 9.2 to ensure tests continue to compile.
[1] Example error from g++ 9.2.1:
In file included from ../include/sys/cdefs.h:3,
from ../include/features.h:465,
from ../bits/libc-header-start.h:33,
from ../math/math.h:27,
from ../include/math.h:7,
from test-math-isinff.cc:21:
../libio/bits/stdio-ldbl.h:25:20: error: declaration of ‘int sprintf(char*, const char*, ...)’ has a different exception specifier
25 | __LDBL_REDIR_DECL (sprintf)
| ^~~~~~~
../misc/sys/cdefs.h:461:26: note: in definition of macro ‘__LDBL_REDIR_DECL’
461 | extern __typeof (name) name __asm (__ASMNAME ("__" #name "ieee128"));
| ^~~~
In file included from ../include/stdio.h:5,
from test-math-isinff.cc:22:
../libio/stdio.h:334:12: note: from previous declaration ‘int sprintf(char*, const char*, ...) throw ()’
334 | extern int sprintf (char *__restrict __s,
| ^~~~~~~
Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
33 lines
908 B
C
33 lines
908 B
C
#ifndef _PRINTF_H
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/* Workaround PR90731 with GCC 9 when using ldbl redirects in C++. */
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#include <bits/floatn.h>
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#if defined __cplusplus && __LONG_DOUBLE_USES_FLOAT128 == 1
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# if __GNUC_PREREQ (9, 0) && !__GNUC_PREREQ (9, 3)
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# pragma GCC system_header
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# endif
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#endif
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#include <stdio-common/printf.h>
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# ifndef _ISOMAC
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#include <bits/types/locale_t.h>
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/* Now define the internal interfaces. */
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extern int __printf_fphex (FILE *, const struct printf_info *,
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const void *const *) attribute_hidden;
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extern int __printf_fp (FILE *, const struct printf_info *,
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const void *const *);
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libc_hidden_proto (__printf_fp)
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extern int __printf_fp_l (FILE *, locale_t, const struct printf_info *,
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const void *const *);
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libc_hidden_proto (__printf_fp_l)
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extern unsigned int __guess_grouping (unsigned int intdig_max,
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const char *grouping)
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attribute_hidden;
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# endif /* !_ISOMAC */
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#endif
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