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| author | Michael Meissner <meissner@linux.vnet.ibm.com> | 2018-01-11 23:31:09 +0000 |
|---|---|---|
| committer | Michael Meissner <meissner@gcc.gnu.org> | 2018-01-11 23:31:09 +0000 |
| commit | 8c7a27d566e7144451d1f0eb79d6b5866035995f (patch) | |
| tree | 866629ef524c5989733eec997136715953b1a31e /gcc/config | |
| parent | 02a03501e439cd92b741034c32ce7238a927dff1 (diff) | |
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configure.ac (--with-long-double-format): Add support for the configuration option to change the default long double...
2018-01-11 Michael Meissner <meissner@linux.vnet.ibm.com>
* configure.ac (--with-long-double-format): Add support for the
configuration option to change the default long double format on
PowerPC systems.
* config.gcc (powerpc*-linux*-*): Likewise.
* configure: Regenerate.
* config/rs6000/rs6000-c.c (rs6000_cpu_cpp_builtins): If long
double is IEEE, define __KC__ and __KF__ to allow floatn.h to be
used without modification.
From-SVN: r256558
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/rs6000/rs6000-c.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/config/rs6000/rs6000-c.c b/gcc/config/rs6000/rs6000-c.c index 7a6954a..b7693d0 100644 --- a/gcc/config/rs6000/rs6000-c.c +++ b/gcc/config/rs6000/rs6000-c.c @@ -708,7 +708,18 @@ rs6000_cpu_cpp_builtins (cpp_reader *pfile) builtin_define ("__LONGDOUBLE128"); if (TARGET_IEEEQUAD) - builtin_define ("__LONG_DOUBLE_IEEE128__"); + { + /* Older versions of GLIBC used __attribute__((__KC__)) to create the + IEEE 128-bit floating point complex type for C++ (which does not + support _Float128 _Complex). If the default for long double is + IEEE 128-bit mode, the library would need to use + __attribute__((__TC__)) instead. Defining __KF__ and __KC__ + is a stop-gap to build with the older libraries, until we + get an updated library. */ + builtin_define ("__LONG_DOUBLE_IEEE128__"); + builtin_define ("__KF__=__TF__"); + builtin_define ("__KC__=__TC__"); + } else builtin_define ("__LONG_DOUBLE_IBM128__"); } |