https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119077
Bug ID: 119077
Summary: gcc option -mint8 leads to undefined reference to
`__builtin_avr_delay_cycles'
Product: gcc
Version: 14.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: [email protected]
Target Milestone: ---
Created attachment 60625
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60625&action=edit
example
If the avr-gcc option -mint8 is used with a _delay_ms() or _delay_us()
function, ld exits with the error-message "undefined reference to
`__builtin_avr_delay_cycles'".
GCC version and build flags:
$ avr-gcc -v
Using built-in specs.
Reading specs from /usr/local/avr/lib/gcc/avr/14.2.0/device-specs/specs-avr2
COLLECT_GCC=avr-gcc
COLLECT_LTO_WRAPPER=/usr/local/avr/libexec/gcc/avr/14.2.0/lto-wrapper
Target: avr
Configured with: ../configure --prefix=/usr/local/avr --target=avr
--enable-languages=c,c++ --disable-nls --disable-libssp --with-dwarf2
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 14.2.0 (GCC)
Compilation:
avr-gcc -mint8 -Os -fwhole-program -mrelax -Wall -Wextra --save-temps
-mmcu=avr25 -DF_CPU=1000000 main.c -o main.elf
Error message:
/usr/local/avr/lib/gcc/avr/14.2.0/../../../../avr/bin/ld: main.elf-main.o: in
function `main':
main.c:(.text.startup+0x4): undefined reference to `__builtin_avr_delay_cycles'
collect2: error: ld returned 1 exit status
