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r260043 - in /trunk/libstdc++-v3: ChangeLog inc...

From: redi at gcc dot gnu dot org
To: gcc-cvs at gcc dot gnu dot org
Date: Tue, 08 May 2018 13:05:05 -0000
Subject: r260043 - in /trunk/libstdc++-v3: ChangeLog inc...

Author: redi
Date: Tue May  8 13:05:04 2018
New Revision: 260043

URL: https://gcc.gnu.org/viewcvs?rev=260043&root=gcc&view=rev
Log:
PR libstdc++/85672 #undef _GLIBCXX_USE_FLOAT128 when not supported

Restore the behaviour in GCC 8 and earlier where _GLIBCXX_USE_FLOAT128
is not defined when configure detects support is missing. This avoids
having three states where the macro is either 1, 0, or undefined.

	PR libstdc++/85672
	* include/Makefile.am [!ENABLE_FLOAT128]: Change c++config.h entry
	to #undef _GLIBCXX_USE_FLOAT128 instead of defining it to zero.
	* include/Makefile.in: Regenerate.
	* include/bits/c++config (_GLIBCXX_USE_FLOAT128): Move definition
	within conditional block.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/Makefile.am
    trunk/libstdc++-v3/include/Makefile.in
    trunk/libstdc++-v3/include/bits/c++config

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