https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114441
Bug ID: 114441
Summary: Relocation issues when compiling with -O1,-O2,and -Os
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: njuwy at smail dot nju.edu.cn
Target Milestone: ---
The source file is:
root@ubuntu:~/test/111# cat 222.cpp
#include <stdio.h>
int a[1][1][1][1][1];
short b[6268435456];
void c() {
for (size_t d;;)
for (size_t e;;)
for (size_t f;;)
for (size_t g;;)
for (size_t i = 0; i < 16; ++i)
a[d][e][f][g][i] = 2;
}
main() {}
The version of g++:
root@ubuntu:~/test/111# /root/software/IP-gcc/gcc-trunk/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/root/software/IP-gcc/gcc-trunk/bin/g++
COLLECT_LTO_WRAPPER=/root/software/IP-gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/14.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure --prefix=/root/software/IP-gcc/gcc-trunk
--enable-languages=c,c++ --disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.1 20240318 (experimental) (GCC)
The issue I had when compiling at different optimization level.At the -O0 and
-O3 optimization level, the compilation proceeded without any errors, but any
attempt to compile with other three optimization levels (-01, -O2 and -Os)
resulted in relocation-related errors, which is also present in exsiting
releases:
root@ubuntu:~/test/111# /root/software/IP-gcc/gcc-trunk/bin/g++ 222.cpp -o test
-w -O0
root@ubuntu:~/test/111# /root/software/IP-gcc/gcc-trunk/bin/g++ 222.cpp -o test
-w -O3
root@ubuntu:~/test/111# /root/software/IP-gcc/gcc-trunk/bin/g++ 222.cpp -o test
-w -O1
/tmp/ccizb4WS.o: In function `c()':
222.cpp:(.text+0xd): relocation truncated to fit: R_X86_64_32S against symbol
`a' defined in .bss section in /tmp/ccizb4WS.o
collect2: error: ld returned 1 exit status
root@ubuntu:~/test/111# /root/software/IP-gcc/gcc-trunk/bin/g++ 222.cpp -o test
-w -O2
/tmp/cchi03vq.o: In function `c()':
222.cpp:(.text+0x13): relocation truncated to fit: R_X86_64_32S against symbol
`a' defined in .bss section in /tmp/cchi03vq.o
collect2: error: ld returned 1 exit status
root@ubuntu:~/test/111# /root/software/IP-gcc/gcc-trunk/bin/g++ 222.cpp -o test
-w -Os
/tmp/ccHbxau8.o: In function `c()':
222.cpp:(.text+0x7): relocation truncated to fit: R_X86_64_32S against symbol
`a' defined in .bss section in /tmp/ccHbxau8.o
collect2: error: ld returned 1 exit status
