1 year ago
#150672
Fabio Dalla Libera
What is the correct way to enable soft floating point computation for 68000 with gcc and newlib?
I am using crosstool-ng to crosscompile for 68000 (version:crosstool-ng-1.24.0-rc2, host OS:Ubuntu 20.04)
My target is a 68000 (plain, not a 68020 or a cpu with floating point support).
I am compiling using a test program which multiplies two floats, using
-m68000 -mcpu=68000 -msoft-float -Wall -fno-builtin -O2
However, when I execute it, I get illegal instruction error (notice, this happens only if I use floats)
Suspecting newlib is targeting 68020, I tried adding
CT_LIBC_NEWLIB_TARGET_CFLAGS="-m68000 -msoft-float"
but that made no difference. What am I doing wrong? Do I need some code in the illegal instruction handler?
gcc
68000
newlib
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