Follow-up Comment #3, bug #32650 (project avr-libc):
Please note that this error occurs when the header is included, regardless of
whether a constant or a variable is passed (in my case, it was actually a
constant), even to the extent that if no calls are made to the delay
functions, and the header is included, it fails.
The attached trivial testcase will produce the following error using GCC
4.5.2:
make all
Building file: ../Testcase.cpp
Invoking: AVR C++ Compiler
avr-g++ -I"A:eclipsemhvlib" -Wall -Os -fpack-struct -fshort-enums
-ffunction-sections -fdata-sections -funsigned-char -funsigned-bitfields
-fno-exceptions -mmcu=atmega1280 -DF_CPU=16000000UL -MMD -MP -MF"Testcase.d"
-MT"Testcase.d" -c -o"Testcase.o" "../Testcase.cpp"
In file included from ../Testcase.cpp:3:0:
c:mhvavrtoolsbin../lib/gcc/avr/4.5.2/../../../../avr/include/util/delay.h: In
function 'void _delay_ms(double)':
c:mhvavrtoolsbin../lib/gcc/avr/4.5.2/../../../../avr/include/util/delay.h:149:42:
error: 'fabs' was not declared in this scope
c:mhvavrtoolsbin../lib/gcc/avr/4.5.2/../../../../avr/include/util/delay.h:149:43:
error: 'ceil' was not declared in this scope
c:mhvavrtoolsbin../lib/gcc/avr/4.5.2/../../../../avr/include/util/delay.h: In
function 'void _delay_us(double)':
c:mhvavrtoolsbin../lib/gcc/avr/4.5.2/../../../../avr/include/util/delay.h:226:42:
error: 'fabs' was not declared in this scope
c:mhvavrtoolsbin../lib/gcc/avr/4.5.2/../../../../avr/include/util/delay.h:226:43:
error: 'ceil' was not declared in this scope
make: *** [Testcase.o] Error 1
(file #22840)
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