On 04/12/20 00:35 +0000, Jonathan Wakely wrote:
On 03/12/20 20:07 -0300, Tulio Magno Quites Machado Filho via Libstdc++ wrote:
Jonathan Wakely via Libstdc++ <libstd...@gcc.gnu.org> writes:
diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
index cbfdf4c6bad..d25842fef35 100644
--- a/libstdc++-v3/configure.ac
+++ b/libstdc++-v3/configure.ac
@@ -421,12 +425,43 @@ case "$target" in
port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"
case "$target" in
powerpc*-*-linux*)
- LONG_DOUBLE_COMPAT_FLAGS="$LONG_DOUBLE_COMPAT_FLAGS -mno-gnu-attribute"
;;
+ LONG_DOUBLE_COMPAT_FLAGS="$LONG_DOUBLE_COMPAT_FLAGS -mno-gnu-attribute"
+ # Check for IEEE128 support in libm:
+ AC_CHECK_LIB(m, frexpf128,
I suggest to replace frexpf128 with __frexpieee128.
The former is available on a glibc that support _Float128 (since glibc 2.26).
The later is available on a glibc that supports binary128 long double (since
glibc 2.32)
Hmm, yes, you pointed me to __frexpieee128 a few months ago, but for
some reason I either didn't switch to using it, or lost a patch when
squashing and rebasing branches. Hopefully I just forgot to change it,
but I'll double check to make sure I haven't left any work on an old
branch. Thanks for suggesting it (again!)
As expected, it still works with a check for __frexpieee128 instead.
So are you happy for me to push this to master with that change?
(It won't be until Tuesday now, as I have some time off).
