[PATCH] Configure failes when CFLAGS contains -flto

[r.schuetze at yahoo.de]

Version number:
	6.0.0.0a
Configure flags:
	CFLAGS="-flto-fuse-linker-plugin"
GCC version:
	gcc version 4.9.2 (Debian 4.9.2-10)
	Target: i586-linux-gnu
Uname:
	Linux debian 4.0.2 #1 PREEMPT
	Fri May 15 16:26:36 CEST 2015 i686 GNU/Linux

Description: The floating-point type check failes.

Have a nice day CoffeeJ
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