Defined in 2 files as a macro:

• gnu/lib/libstdc++/config.h, line 371 (as a macro)
• gnu/lib/libstdc++/config.h, line 1097 (as a macro)

Referenced in 3 files:

• contrib/libstdc++/libmath/mathconf.h, line 299
• contrib/libstdc++/libmath/stubs.c, line 441
• gnu/lib/libstdc++/config.h, line 1096