ARM Linking Arguments

[Joel Sherrill]

Hi

I am trying to compile some test code for an odd ARM with single precision.
I think I have successfully compiled a toolchain with libraries with only
32 bit float. But I think there need to be some arguments on the link that
gcc may not be passing through.

The CPU flags are "c -mcpu=cortex-m7 -mthumb -mlittle-endian
-mfloat-abi=hard -mfpu=fpv5-sp-d16 -march=armv7e-m+fpv5"

Based on the output, I think ld has a different idea of what the executable
"main" should be from what the input objects are.

Any thoughts on what would be a way to correct this?

 /home/joel/test-gcc/install-arm-eabi//bin/arm-rtems6-gcc -mcpu=cortex-m7
-mthumb -mlittle-endian -mfloat-abi=hard -mfpu=fpv5-sp-d16
-march=armv7e-m+fpv5 -c -o main.o main.c
/home/joel/test-gcc/install-arm-eabi//bin/arm-rtems6-gcc -mcpu=cortex-m7
-mthumb -mlittle-endian -mfloat-abi=hard -mfpu=fpv5-sp-d16
-march=armv7e-m+fpv5 -c -o crunch_f32.o crunch_f32.c
/home/joel/test-gcc/install-arm-eabi//bin/arm-rtems6-gcc -mcpu=cortex-m7
-mthumb -mlittle-endian -mfloat-abi=hard -mfpu=fpv5-sp-d16
-march=armv7e-m+fpv5 -c -o crunch_f64.o crunch_f64.c
/home/joel/test-gcc/install-arm-eabi//bin/arm-rtems6-gcc -mcpu=cortex-m7
-mthumb -mlittle-endian -mfloat-abi=hard -mfpu=fpv5-sp-d16
-march=armv7e-m+fpv5 -o main main.o crunch_f32.o crunch_f64.o

/home/joel/test-gcc/install-arm-eabi/lib/gcc/arm-rtems6/12.3.1/../../../../arm-rtems6/bin/ld:
error: main.o uses VFP register arguments, main does not

/home/joel/test-gcc/install-arm-eabi/lib/gcc/arm-rtems6/12.3.1/../../../../arm-rtems6/bin/ld:
failed to merge target specific data of file main.o

Thanks.

--joel
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