Hello, I am trying to follow the steps described in http://cs107e.github.io/guides/gcc/ to build a freestanding application which is using functions from libgcc The code I am trying to compile can be found at https://github.com/ESultanik/mtwister I guess the problem comes from the usage of the "double" type in thise code. This is how I invoke compileer and linker: $ m68k-unknown-elf-gcc -ansi -std=c89 -pedantic -Wall -Wcast-align \ -Wstrict-prototypes \ -Wmissing-prototypes -Wnull-dereference \ -O2 -g -fno-toplevel-reorder -mcpu32 \ -ffreestanding -static-libgcc -lgcc \ -c -o mtwister.o mtwister.c $ m68k-unknown-elf-gcc -ansi -std=c89 -pedantic -Wall -Wcast-align \ -Wstrict-prototypes \ -Wmissing-prototypes -Wnull-dereference \ -O2 -g -fno-toplevel-reorder -mcpu32 \ -ffreestanding -static-libgcc -lgcc \ -Wl,--cref,--section-start=vectors=0 \ -nostdlib -Wl,-Ttext=0x400,--entry=entry \ -Wl,--oformat,elf32-m68k \ -Wl,--cref,-Map,bestd.map \ -Wl,-T,ldscript.ld \ -o output.elf `cat file.objs` The linker complains that it can't find __floatunsidf and __divdf3 I have tried to use -Wl,-lgcc instead, but this did not help. The map file says that libgcc is loaded: $ grep libgcc *.map LOAD /m68k-unknown-elf/lib/gcc/m68k-unknown-elf/9.3.0/mcpu32/libgcc.a LOAD /m68k-unknown-elf/lib/gcc/m68k-unknown-elf/9.3.0/mcpu32/libgcc.a And I can see that those functions are provided by libgcc: $ nm /m68k-unknown-elf/lib/gcc/m68k-unknown-elf/9.3.0/mcpu32/libgcc.a|egrep '(__divdf3|__floatunsidf)' 000005a4 T __divdf3 U __divdf3 U __divdf3 U __floatunsidf U __floatunsidf U __floatunsidf U __floatunsidf U __floatunsidf U __floatunsidf 000000ba T __floatunsidf U __divdf3 U __floatunsidf What am I missinghere? Any help? BTW: This is gcc-9.3.0 and binutils-2.34 -- Josef Wolf jw@xxxxxxxxxxxxx
