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How do I build an arm interwork libgcc.a? FPA vs VFP?
- From: Larry Fast <lfast at yahoo dot com>
- To: gcc-help at gcc dot gnu dot org
- Date: Wed, 14 May 2003 20:54:34 -0400 (EDT)
- Subject: How do I build an arm interwork libgcc.a? FPA vs VFP?
- Reply-to: lfast at yahoo dot com
I'm trying to build a mixed arm-thumb system and need an interwork enabled
libgcc.a (I think).
Normal builds of gcc produce a libgcc/ and libgcc/thumb directories.
What configure options do I use to get an interwork library?
Or is my problem somewhere else?
Here are the linker errors I get when I use the existing libraries:
arm-thumb-elf-ld: ERROR: libgcc.a(_udivsi3.o) uses FPA instructions, whereas
demo_app.bin uses VFP instructions
arm-thumb-elf-ld: Warning: libgcc.a(_udivsi3.o) does not support
interworking, whereas demo_app.bin does
File format not recognized: failed to merge target specific data of file
libgcc.a(_udivsi3.o)
The gcc, as & ld commands I'm currently using are:
arm-thumb-elf-gcc -S -v -mcpu=arm7tdmi -Wa, -mthumb-interwork -mapcs
-mapcs-frame -mno-apcs-float -fno-gnu-linker -gdwarf-2 -mthumb -m \
-I../ghdr ../app/*.c ../rtos/*.c
arm-thumb-elf-as -D --gstabs -mapcs-32 -ahls -mthumb-interwork -EL -I../ghdr
-I../app -o limits.os ../rtos/limits.s
arm-thumb-elf-ld -EL -E -n -Map flash.map -T ../make/ldscript -o
demo_app.bin crt0.os1 *.o *.os *.a
Larry Fast