https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101115
Bug ID: 101115
Summary: ld.bfd: warning: .init_array section has zero size
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: judge.packham at gmail dot com
Target Milestone: ---
When cross-compiling for arm using GCC 11.1.0 the linker complains that
.init_array and .fini_array have a zero size.
x-tool@063c4281c760:~$ rm -f test test.o; make CC=arm-unknown-linux-gnueabi-gcc
test
arm-unknown-linux-gnueabi-gcc test.c -o test
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/../../../../arm-unknown-linux-gnueabi/bin/ld.bfd:
warning: .init_array section has zero size
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/../../../../arm-unknown-linux-gnueabi/bin/ld.bfd:
warning: .fini_array section has zero size
The program being compiled is a simple "hello world".
I've also seen the same problem with GCC 10.3.0. I do not see the problem with
GCC 9.3.0.
Based on some debugging with the help of the bintutils mailing list[1] it seems
that crtbegin.o has a zero sized init_array/.fini_array
find . -name 'crtbegin.o' | xargs readelf -SW
File:
./x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/crtbegin.o
There are 13 section headers, starting at offset 0x2bc:
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf
Al
[ 0] NULL 00000000 000000 000000 00 0 0
0
[ 1] .text PROGBITS 00000000 000034 000000 00 AX 0 0
1
[ 2] .data PROGBITS 00000000 000034 000004 00 WA 0 0
4
[ 3] .bss NOBITS 00000000 000038 000000 00 WA 0 0
1
[ 4] .rodata PROGBITS 00000000 000038 000090 00 A 0 0
4
[ 5] .init_array INIT_ARRAY 00000000 0000c8 000000 04 WA 0 0
1
[ 6] .fini_array FINI_ARRAY 00000000 0000c8 000000 04 WA 0 0
1
[ 7] .comment PROGBITS 00000000 0000c8 00002f 01 MS 0 0
1
[ 8] .note.GNU-stack PROGBITS 00000000 0000f7 000000 00 0 0
1
[ 9] .ARM.attributes ARM_ATTRIBUTES 00000000 0000f7 000031 00 0 0
1
[10] .symtab SYMTAB 00000000 000128 0000f0 10 11 14
4
[11] .strtab STRTAB 00000000 000218 00002e 00 0 0
1
[12] .shstrtab STRTAB 00000000 000246 000075 00 0 0
1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
L (link order), O (extra OS processing required), G (group), T (TLS),
C (compressed), x (unknown), o (OS specific), E (exclude),
y (purecode), p (processor specific)
With GCC 9.3.0 it does not
File:
./x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/9.3.0/crtbegin.o
There are 16 section headers, starting at offset 0x518:
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf
Al
[ 0] NULL 00000000 000000 000000 00 0 0
0
[ 1] .text PROGBITS 00000000 000034 000090 00 AX 0 0
4
[ 2] .rel.text REL 00000000 000444 000038 08 I 13 1
4
[ 3] .data PROGBITS 00000000 0000c4 000004 00 WA 0 0
4
[ 4] .bss NOBITS 00000000 0000c8 000001 00 WA 0 0
1
[ 5] .init_array INIT_ARRAY 00000000 0000c8 000004 04 WA 0 0
4
[ 6] .rel.init_array REL 00000000 00047c 000008 08 I 13 5
4
[ 7] .fini_array FINI_ARRAY 00000000 0000cc 000004 04 WA 0 0
4
readelf: Warning: [ 8]: Info field (7) should index a relocatable section.
[ 8] .rel.fini_array REL 00000000 000484 000008 08 I 13 7
4
[ 9] .tm_clone_table PROGBITS 00000000 0000d0 000000 00 WA 0 0
4
[10] .comment PROGBITS 00000000 0000d0 00002e 01 MS 0 0
1
[11] .note.GNU-stack PROGBITS 00000000 0000fe 000000 00 0 0
1
[12] .ARM.attributes ARM_ATTRIBUTES 00000000 0000fe 00002a 00 0 0
1
[13] .symtab SYMTAB 00000000 000128 000220 10 14 30
4
[14] .strtab STRTAB 00000000 000348 0000fa 00 0 0
1
[15] .shstrtab STRTAB 00000000 00048c 000089 00 0 0
1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
L (link order), O (extra OS processing required), G (group), T (TLS),
C (compressed), x (unknown), o (OS specific), E (exclude),
y (purecode), p (processor specific)
I'm also tracking this problem on the crosstool-ng issue tracker[2] there is a
little bit more info there. I'll try to keep these two issues in sync so no
need to follow the link.
For completeness here's the output with the -v flag passed to GCC.
x-tool@063c4281c760:~$ rm -f test test.o; make CC=arm-unknown-linux-gnueabi-gcc
CFLAGS=-v test
arm-unknown-linux-gnueabi-gcc -v test.c -o test
Using built-in specs.
COLLECT_GCC=arm-unknown-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/home/x-tool/x-tools/arm-unknown-linux-gnueabi/libexec/gcc/arm-unknown-linux-gnueabi/11.1.0/lto-wrapper
Target: arm-unknown-linux-gnueabi
Configured with:
/home/x-tool/.build/arm-unknown-linux-gnueabi/src/gcc/configure
--build=x86_64-build_pc-linux-gnu --host=x86_64-build_pc-linux-gnu
--target=arm-unknown-linux-gnueabi
--prefix=/home/x-tool/x-tools/arm-unknown-linux-gnueabi
--exec_prefix=/home/x-tool/x-tools/arm-unknown-linux-gnueabi
--with-sysroot=/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot
--enable-languages=c,c++ --with-float=soft --with-pkgversion='crosstool-NG
1.24.0.373_5ab29fb' --disable-sjlj-exceptions --enable-__cxa_atexit
--disable-tm-clone-registry --disable-libmudflap --disable-libgomp
--disable-libssp --disable-libquadmath --disable-libquadmath-support
--disable-libsanitizer --disable-libmpx
--with-gmp=/home/x-tool/.build/arm-unknown-linux-gnueabi/buildtools
--with-mpfr=/home/x-tool/.build/arm-unknown-linux-gnueabi/buildtools
--with-mpc=/home/x-tool/.build/arm-unknown-linux-gnueabi/buildtools
--with-isl=/home/x-tool/.build/arm-unknown-linux-gnueabi/buildtools
--enable-lto --with-host-libstdcxx='-static-libgcc
-Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --enable-threads=posix
--enable-target-optspace --enable-plugin --enable-gold --disable-nls
--disable-multilib
--with-local-prefix=/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot
--enable-long-long
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 11.1.0 (crosstool-NG 1.24.0.373_5ab29fb)
COLLECT_GCC_OPTIONS='-v' '-o' 'test' '-mcpu=arm10tdmi' '-mfloat-abi=soft'
'-mtls-dialect=gnu' '-marm' '-march=armv5t'
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/libexec/gcc/arm-unknown-linux-gnueabi/11.1.0/cc1
-quiet -v test.c -quiet -dumpbase test.c -dumpbase-ext .c -mcpu=arm10tdmi
-mfloat-abi=soft -mtls-dialect=gnu -marm -march=armv5t -version -o
/tmp/cc4QsweE.s
GNU C17 (crosstool-NG 1.24.0.373_5ab29fb) version 11.1.0
(arm-unknown-linux-gnueabi)
compiled by GNU C version 8.3.0, GMP version 6.2.1, MPFR version 4.1.0,
MPC version 1.2.0, isl version isl-0.24-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot/include"
#include "..." search starts here:
#include <...> search starts here:
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/include
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/include-fixed
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/../../../../arm-unknown-linux-gnueabi/include
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot/usr/include
End of search list.
GNU C17 (crosstool-NG 1.24.0.373_5ab29fb) version 11.1.0
(arm-unknown-linux-gnueabi)
compiled by GNU C version 8.3.0, GMP version 6.2.1, MPFR version 4.1.0,
MPC version 1.2.0, isl version isl-0.24-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: e9288bd94a72e0d2532aee1fd8ebe463
COLLECT_GCC_OPTIONS='-v' '-o' 'test' '-mcpu=arm10tdmi' '-mfloat-abi=soft'
'-mtls-dialect=gnu' '-marm' '-march=armv5t'
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/../../../../arm-unknown-linux-gnueabi/bin/as
-v -march=armv5t -mfloat-abi=soft -meabi=5 -o /tmp/ccjAz6OZ.o /tmp/cc4QsweE.s
GNU assembler version 2.36.1 (arm-unknown-linux-gnueabi) using BFD version
(crosstool-NG 1.24.0.373_5ab29fb) 2.36.1
COMPILER_PATH=/home/x-tool/x-tools/arm-unknown-linux-gnueabi/libexec/gcc/arm-unknown-linux-gnueabi/11.1.0/:/home/x-tool/x-tools/arm-unknown-linux-gnueabi/libexec/gcc/arm-unknown-linux-gnueabi/11.1.0/:/home/x-tool/x-tools/arm-unknown-linux-gnueabi/libexec/gcc/arm-unknown-linux-gnueabi/:/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/:/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/:/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/../../../../arm-unknown-linux-gnueabi/bin/
LIBRARY_PATH=/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/:/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/../../../../arm-unknown-linux-gnueabi/lib/:/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot/lib/:/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-o' 'test' '-mcpu=arm10tdmi' '-mfloat-abi=soft'
'-mtls-dialect=gnu' '-marm' '-march=armv5t' '-dumpdir' 'test.'
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/libexec/gcc/arm-unknown-linux-gnueabi/11.1.0/collect2
-plugin
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/libexec/gcc/arm-unknown-linux-gnueabi/11.1.0/liblto_plugin.so
-plugin-opt=/home/x-tool/x-tools/arm-unknown-linux-gnueabi/libexec/gcc/arm-unknown-linux-gnueabi/11.1.0/lto-wrapper
-plugin-opt=-fresolution=/tmp/ccUgJcql.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s
--sysroot=/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot
--eh-frame-hdr -dynamic-linker /lib/ld-linux.so.3 -X -m armelf_linux_eabi -o
test
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot/usr/lib/crt1.o
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot/usr/lib/crti.o
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/crtbegin.o
-L/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0
-L/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/../../../../arm-unknown-linux-gnueabi/lib
-L/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot/lib
-L/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot/usr/lib
/tmp/ccjAz6OZ.o -lgcc --push-state --as-needed -lgcc_s --pop-state -lc -lgcc
--push-state --as-needed -lgcc_s --pop-state
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/crtend.o
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot/usr/lib/crtn.o
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/../../../../arm-unknown-linux-gnueabi/bin/ld.bfd:
warning: .init_array section has zero size
/home/x-tool/x-tools/arm-unknown-linux-gnueabi/lib/gcc/arm-unknown-linux-gnueabi/11.1.0/../../../../arm-unknown-linux-gnueabi/bin/ld.bfd:
warning: .fini_array section has zero size
COLLECT_GCC_OPTIONS='-v' '-o' 'test' '-mcpu=arm10tdmi' '-mfloat-abi=soft'
'-mtls-dialect=gnu' '-marm' '-march=armv5t' '-dumpdir' 'test.'
--
[1] - https://sourceware.org/pipermail/binutils/2021-June/116962.html
[2] - https://github.com/crosstool-ng/crosstool-ng/issues/1531
