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author | Paul E. Murphy <murphyp@linux.vnet.ibm.com> | 2020-03-06 09:41:03 -0600 |
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committer | Paul E. Murphy <murphyp@linux.vnet.ibm.com> | 2020-04-30 08:52:08 -0500 |
commit | 86005fdbf40d6fc84d84c824d75c656e7c1398e3 (patch) | |
tree | f2db5cb76956d7bcedeb4e6b721dfa18f4ce367d /include/monetary.h | |
parent | ab54e26415ea82444a9529041427137bf27c615c (diff) | |
download | glibc-86005fdbf40d6fc84d84c824d75c656e7c1398e3.tar.gz glibc-86005fdbf40d6fc84d84c824d75c656e7c1398e3.tar.xz glibc-86005fdbf40d6fc84d84c824d75c656e7c1398e3.zip |
ldbl-128ibm-compat: workaround GCC 9 C++ PR90731
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>
Diffstat (limited to 'include/monetary.h')
-rw-r--r-- | include/monetary.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/monetary.h b/include/monetary.h index 240925e87d..bddc660ce2 100644 --- a/include/monetary.h +++ b/include/monetary.h @@ -1,3 +1,11 @@ +/* Workaround PR90731 with GCC 9 when using ldbl redirects in C++. */ +#include <bits/floatn.h> +#if defined __cplusplus && __LONG_DOUBLE_USES_FLOAT128 == 1 +# if __GNUC_PREREQ (9, 0) && !__GNUC_PREREQ (9, 3) +# pragma GCC system_header +# endif +#endif + #include <stdlib/monetary.h> #ifndef _ISOMAC #include <stdarg.h> |