The difference between arm-linux-gcc .s and .S !-EEWORLD

Collect

Unix/Linux is case sensitive:

.s Operation: Assembly

.S operation: cpp + assembly

eg:

/* start.s */

#define rTEXT 0x12345678

LDR R0,=rTEXT

....

# arm-linux-gcc -g -c -nostdlib start.s -o start.o

# nm -u start.o

rTEXT

# arm-linux-objdump -S -t start.o > start.l

# cat start.i | grep ''R0"

LDR R0,【PC,#0】

Classic mistake:

arm-linux-gcc mistakenly treats the .s file as a file processed by cpp (file type is not ignored), so it regards rTEXT as a label. When arm-linux-ld reports undefined reference ....

Just rename .s to .S!!

# mv start.s start.S

# .....

You can

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