https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118981
--- Comment #25 from Erich Löw <Erich.Loew at outlook dot com> ---
With system GCC 15.0.1 I do as below....
I created: main.cc
#include <stdio.h>
#include <stdlib.h>
struct A { A() { } };
[[gnu::init_priority(99)]] A a;
[[gnu::init_priority(99)]] A a2;
struct B { B() { } };
[[gnu::init_priority(99)]] B b;
int main(int argc, char* argv[])
{
void const *const addrA1 = (void const *const)&a;
void const *const addrA2 = (void const *const)&a2;
void const *const addrB = (void const *const)&b;
printf("Addr(a) == 0x%016Xu\n", addrA1);
printf("Addr(a2) == 0x%016Xu\n", addrA2);
printf("Addr(b) == 0x%016Xu\n", addrB);
return 0;
}
The obligatory Makefile
# MAKE file
CXX = g++
LD = g++ -s
INC = -I./
test: all
all: 118981
clean:
-rm -f *.o *.so
-rm -f 118981
118981 : main.cc
$(CXX) $(INC) -c -o main.o main.cc
$(LD) -o 118981 main.o
------------------------------------------------
Compiling with close to LATEST system GCC 15.0.1
root:/home/SETUP/Examples/GNU-118981> g++ --version
g++ (GCC) 15.0.1 20250218 (experimental)
Copyright (C) 2025 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
shows results a you predicted
root:/home/SETUP/Examples/GNU-118981> make clean
rm -f *.o *.so
rm -f 118981
root:/home/SETUP/Examples/GNU-118981> make all
g++ -I./ -c -o main.o main.cc
main.cc:6:30: warning: requested ‘init_priority’ 99 is reserved for internal
use [-Wprio-ctor-dtor]
6 | [[gnu::init_priority(99)]] A a;
| ^
main.cc:7:30: warning: requested ‘init_priority’ 99 is reserved for internal
use [-Wprio-ctor-dtor]
7 | [[gnu::init_priority(99)]] A a2;
| ^~
main.cc:10:30: warning: requested ‘init_priority’ 99 is reserved for internal
use [-Wprio-ctor-dtor]
10 | [[gnu::init_priority(99)]] B b;
| ^
g++ -s -o 118981 main.o
Hence using 99 multiple times with system GCC works.
Now I check with interim xgcc in next comment slice.
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