diff --git a/gcc/config/float-m68k.h b/gcc/config/float-m68k.h
new file mode 100644
index 00000000000..b36d447cb87
--- /dev/null
+++ b/gcc/config/float-m68k.h
@@ -0,0 +1,97 @@
+/* float.h for target with IEEE 32 bit and 64 bit and Motorola style 96 bit
+   floating point formats */
+#ifndef _FLOAT_H_
+#define _FLOAT_H_
+/* Produced by enquire version 4.3, CWI, Amsterdam */
+
+   /* Radix of exponent representation */
+#undef FLT_RADIX
+#define FLT_RADIX 2
+   /* Number of base-FLT_RADIX digits in the significand of a float */
+#undef FLT_MANT_DIG
+#define FLT_MANT_DIG 24
+   /* Number of decimal digits of precision in a float */
+#undef FLT_DIG
+#define FLT_DIG 6
+   /* Addition rounds to 0: zero, 1: nearest, 2: +inf, 3: -inf, -1: unknown */
+#undef FLT_ROUNDS
+#define FLT_ROUNDS 1
+   /* Difference between 1.0 and the minimum float greater than 1.0 */
+#undef FLT_EPSILON
+#define FLT_EPSILON 1.19209290e-07F
+   /* Minimum int x such that FLT_RADIX**(x-1) is a normalised float */
+#undef FLT_MIN_EXP
+#define FLT_MIN_EXP (-125)
+   /* Minimum normalised float */
+#undef FLT_MIN
+#define FLT_MIN 1.17549435e-38F
+   /* Minimum int x such that 10**x is a normalised float */
+#undef FLT_MIN_10_EXP
+#define FLT_MIN_10_EXP (-37)
+   /* Maximum int x such that FLT_RADIX**(x-1) is a representable float */
+#undef FLT_MAX_EXP
+#define FLT_MAX_EXP 128
+   /* Maximum float */
+#undef FLT_MAX
+#define FLT_MAX 3.40282347e+38F
+   /* Maximum int x such that 10**x is a representable float */
+#undef FLT_MAX_10_EXP
+#define FLT_MAX_10_EXP 38
+
+   /* Number of base-FLT_RADIX digits in the significand of a double */
+#undef DBL_MANT_DIG
+#define DBL_MANT_DIG 53
+   /* Number of decimal digits of precision in a double */
+#undef DBL_DIG
+#define DBL_DIG 15
+   /* Difference between 1.0 and the minimum double greater than 1.0 */
+#undef DBL_EPSILON
+#define DBL_EPSILON 2.2204460492503131e-16
+   /* Minimum int x such that FLT_RADIX**(x-1) is a normalised double */
+#undef DBL_MIN_EXP
+#define DBL_MIN_EXP (-1021)
+   /* Minimum normalised double */
+#undef DBL_MIN
+#define DBL_MIN 2.2250738585072014e-308
+   /* Minimum int x such that 10**x is a normalised double */
+#undef DBL_MIN_10_EXP
+#define DBL_MIN_10_EXP (-307)
+   /* Maximum int x such that FLT_RADIX**(x-1) is a representable double */
+#undef DBL_MAX_EXP
+#define DBL_MAX_EXP 1024
+   /* Maximum double */
+#undef DBL_MAX
+#define DBL_MAX 1.7976931348623157e+308
+   /* Maximum int x such that 10**x is a representable double */
+#undef DBL_MAX_10_EXP
+#define DBL_MAX_10_EXP 308
+
+   /* Number of base-FLT_RADIX digits in the significand of a long double */
+#undef LDBL_MANT_DIG
+#define LDBL_MANT_DIG 64
+   /* Number of decimal digits of precision in a long double */
+#undef LDBL_DIG
+#define LDBL_DIG 18
+   /* Difference between 1.0 and the minimum long double greater than 1.0 */
+#undef LDBL_EPSILON
+#define LDBL_EPSILON 1.08420217248550443401e-19L
+   /* Minimum int x such that FLT_RADIX**(x-1) is a normalised long double */
+#undef LDBL_MIN_EXP
+#define LDBL_MIN_EXP (-16382)
+   /* Minimum normalised long double */
+#undef LDBL_MIN
+#define LDBL_MIN 1.68105157155604675313e-4932L
+   /* Minimum int x such that 10**x is a normalised long double */
+#undef LDBL_MIN_10_EXP
+#define LDBL_MIN_10_EXP (-4931)
+   /* Maximum int x such that FLT_RADIX**(x-1) is a representable long double */
+#undef LDBL_MAX_EXP
+#define LDBL_MAX_EXP 16384
+   /* Maximum long double */
+#undef LDBL_MAX
+#define LDBL_MAX 1.18973149535723176502e+4932L
+   /* Maximum int x such that 10**x is a representable long double */
+#undef LDBL_MAX_10_EXP
+#define LDBL_MAX_10_EXP 4932
+
+#endif /*  _FLOAT_H_ */
diff --git a/gcc/configure.in b/gcc/configure.in
index 3d97e053d8d..d79c4dd0f82 100644
--- a/gcc/configure.in
+++ b/gcc/configure.in
@@ -1304,12 +1304,14 @@ for machine in $build $host $target; do
 			tm_file="${tm_file} m68k/auxas.h"
 		fi
 		tm_file="${tm_file} m68k/a-ux.h"
+		float_format=m68k
 		;;
 	m68k-apollo-*)
 		tm_file=m68k/apollo68.h
 		xmake_file=m68k/x-apollo68
 		use_collect2=yes
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-altos-sysv*)		   # Altos 3068
 		if [[ x$gas = xyes ]]
@@ -1347,6 +1349,7 @@ for machine in $build $host $target; do
 		tmake_file=t-svr4
 		extra_parts="crtbegin.o crtend.o"
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-motorola-sysv*)
 		tm_file=m68k/mot3300.h
@@ -1375,6 +1378,7 @@ for machine in $build $host $target; do
 		gdb_needs_out_file_path=yes
 		extra_parts="crt0.o mcrt0.o"
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-ncr-sysv*)			# NCR Tower 32 SVR3
 		tm_file=m68k/tower-as.h
@@ -1412,23 +1416,27 @@ for machine in $build $host $target; do
 		tmake_file=t-svr4
 		extra_parts="crtbegin.o crtend.o"
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-ccur-rtu)
 		tm_file=m68k/ccur-GAS.h
 		xmake_file=m68k/x-ccur
 		extra_headers=math-68881.h
 		use_collect2=yes
+		float_format=m68k
 		;;
 	m68k-hp-bsd4.4*)		# HP 9000/3xx running 4.4bsd
 		tm_file=m68k/hp3bsd44.h
 		xmake_file=m68k/x-hp3bsd44
 		use_collect2=yes
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-hp-bsd*)			# HP 9000/3xx running Berkeley Unix
 		tm_file=m68k/hp3bsd.h
 		use_collect2=yes
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-isi-bsd*)
 		if [[ x$with_fp = xno ]]
@@ -1436,6 +1444,7 @@ for machine in $build $host $target; do
 			tm_file=m68k/isi-nfp.h
 		else
 			tm_file=m68k/isi.h
+			float_format=m68k
 		fi
 		use_collect2=yes
 		extra_headers=math-68881.h
@@ -1454,6 +1463,7 @@ for machine in $build $host $target; do
 		install_headers_dir=install-headers-cpio
 		use_collect2=yes
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-hp-hpux*)	# HP 9000 series 300
 		xm_file="xm_alloca.h ${xm_file}"
@@ -1469,11 +1479,13 @@ for machine in $build $host $target; do
 		install_headers_dir=install-headers-cpio
 		use_collect2=yes
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-sun-mach*)
 		tm_file=m68k/sun3mach.h
 		use_collect2=yes
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-sony-newsos3*)
 		if [[ x$gas = xyes ]]
@@ -1484,6 +1496,7 @@ for machine in $build $host $target; do
 		fi
 		use_collect2=yes
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-sony-bsd* | m68k-sony-newsos*)
 		if [[ x$gas = xyes ]]
@@ -1494,6 +1507,7 @@ for machine in $build $host $target; do
 		fi
 		use_collect2=yes
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-next-nextstep2*)
 		tm_file=m68k/next21.h
@@ -1503,6 +1517,7 @@ for machine in $build $host $target; do
 		extra_objs=nextstep.o
 		extra_headers=math-68881.h
 		use_collect2=yes
+		float_format=m68k
                 ;;
 	m68k-next-nextstep3*)
 		tm_file=m68k/next.h
@@ -1511,6 +1526,7 @@ for machine in $build $host $target; do
 		xmake_file=m68k/x-next
 		extra_objs=nextstep.o
 		extra_headers=math-68881.h
+		float_format=m68k
  		if [[ x$enable_threads = xyes ]]; then
 			thread_file='mach'
 		fi
@@ -1521,6 +1537,7 @@ for machine in $build $host $target; do
 			tm_file=m68k/sun3n3.h
 		else
 			tm_file=m68k/sun3o3.h
+			float_format=m68k
 		fi
 		use_collect2=yes
 		extra_headers=math-68881.h
@@ -1531,6 +1548,7 @@ for machine in $build $host $target; do
 			tm_file=m68k/sun3n.h
 		else
 			tm_file=m68k/sun3.h
+			float_format=m68k
 		fi
 		use_collect2=yes
 		extra_headers=math-68881.h
@@ -1540,16 +1558,19 @@ for machine in $build $host $target; do
 		tmake_file=m68k/t-vxworks68
 		extra_headers=math-68881.h
 		thread_file='vxworks'
+		float_format=m68k
 		;;
 	m68k-*-aout*)
 		tmake_file=m68k/t-m68kbare
 		tm_file="m68k/m68k-aout.h libgloss.h"
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-*-coff*)
 		tmake_file=m68k/t-m68kbare
 		tm_file="m68k/m68k-coff.h dbx.h libgloss.h"
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-*-lynxos*)
 		if [[ x$gas = xyes ]]
@@ -1562,12 +1583,14 @@ for machine in $build $host $target; do
 		xmake_file=x-lynx
 		tmake_file=m68k/t-lynx
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-*-netbsd*)
 		tm_file=m68k/netbsd.h
 		# On NetBSD, the headers are already okay, except for math.h.
 		fixincludes=fixinc.wrap
 		tmake_file=t-netbsd
+		float_format=m68k
 		;;
 	m68k-*-sysv3*)			# Motorola m68k's running system V.3
 		xm_file="xm-alloca.h ${xm_file}"
@@ -1575,6 +1598,7 @@ for machine in $build $host $target; do
 		xmake_file=m68k/x-m68kv
 		extra_parts="crtbegin.o crtend.o"
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-*-sysv4*)			# Motorola m68k's running system V.4
 		tm_file=m68k/m68kv4.h
@@ -1583,6 +1607,7 @@ for machine in $build $host $target; do
 		tmake_file=t-svr4
 		extra_parts="crtbegin.o crtend.o"
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-*-linux-gnuaout*)		# Motorola m68k's running GNU/Linux
 					# with a.out format
@@ -1591,6 +1616,7 @@ for machine in $build $host $target; do
 		tmake_file="t-linux-aout m68k/t-linux-aout"
 		fixincludes=Makefile.in # The headers are ok already.
 		extra_headers=math-68881.h
+		float_format=m68k
 		gnu_ld=yes
 		;;
 	m68k-*-linux-gnulibc1)		# Motorola m68k's running GNU/Linux
@@ -1602,6 +1628,7 @@ for machine in $build $host $target; do
 		extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
 		fixincludes=Makefile.in # The headers are ok already.
 		extra_headers=math-68881.h
+		float_format=m68k
 		gnu_ld=yes
 		;;
 	m68k-*-linux-gnu*)		# Motorola m68k's running GNU/Linux
@@ -1613,6 +1640,7 @@ for machine in $build $host $target; do
 		extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
 		fixincludes=Makefile.in # The headers are ok already.
 		extra_headers=math-68881.h
+		float_format=m68k
 		gnu_ld=yes
 		if [[ x$enable_threads = xyes ]]; then
 			thread_file='posix'
@@ -1622,11 +1650,13 @@ for machine in $build $host $target; do
 		tmake_file=m68k/t-m68kbare
 		tm_file=m68k/m68k-psos.h
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 	m68k-*-rtems*)
 		tmake_file="m68k/t-m68kbare t-rtems"
 		tm_file=m68k/rtems.h
 		extra_headers=math-68881.h
+		float_format=m68k
 		;;
 
 	m88k-dg-dgux*)