On Sat, 2022-10-22 at 16:06 +0200, Samuel Thibault wrote: > Hello, > > We're seeing a missing _DYNAMIC symbol here: > > https://buildd.debian.org/status/fetch.php?pkg=gnupg2&arch=hurd-i386&ver=2.2.40-1&stamp=1666261690&raw=0 > > which is leaving me completely confused. > > > gcc -I/usr/include -I/usr/include -Wall -Wno-format-zero-length - > Wno-pointer-sign -Wpointer-arith -g -O2 -ffile-prefix- > map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat - > Werror=format-security -Wl,-z,relro -Wl,-z,now -pie -static -o gpgv > gpgv.o build-packet.o compress.o free-packet.o getkey.o keydb.o > keyring.o seskey.o kbnode.o mainproc.o armor.o mdfilter.o textfilter.o > progress.o misc.o rmd160.o openfile.o keyid.o parse-packet.o cpr.o > plaintext.o sig-check.o keylist.o pkglue.o ecdh.o verify.o > ../kbx/libkeybox.a ../common/libcommon.a ../regexp/libregexp.a > ../common/libgpgrl.a -lz -L/usr/lib/i386-gnu -lgcrypt - > L/usr/lib/i386-gnu -lgpg-error > [...] > /usr/bin/ld: /usr/lib/i386-gnu/libcrt.a(dl-reloc-static-pie.o): in > function `_dl_relocate_static_pie': > (.text+0x31): undefined reference to `_DYNAMIC' > > So this is static pie (-pie -static)
No it's not. The GCC option for static PIE is -static-pie (no whitespace between -static and -pie), not -pie -static. See the example: $ cc hw.c -pie -static $ file a.out a.out: ELF 64-bit LSB executable, x86-64, version 1 (GNU/Linux), statically linked, for GNU/Linux 5.19.0, with debug_info, not stripped $ cc hw.c -static-pie $ file a.out a.out: ELF 64-bit LSB pie executable, x86-64, version 1 (GNU/Linux), static-pie linked, for GNU/Linux 5.19.0, with debug_info, not stripped > and I'm getting just the same > issue with a mere int main(void) {} built with -static -pie. > > > When debugging a bit on Debian Hurd: > > $ gcc test.o -o test -pie -static -v > [...] > /usr/lib/gcc/i686-gnu/12/collect2 -plugin /usr/lib/gcc/i686- > gnu/12/liblto_plugin.so -plugin-opt=/usr/lib/gcc/i686-gnu/12/lto- > wrapper -plugin-opt=-fresolution=/tmp/ccR0YAaP.res -plugin-opt=-pass- > through=-lgcc -plugin-opt=-pass-through=-lgcc_eh -plugin-opt=-pass- > through=-lc --build-id -m elf_i386 --hash-style=gnu --as-needed - > static -o test /usr/lib/gcc/i686-gnu/12/../../../i386-gnu/Scrt1.o > /usr/lib/gcc/i686-gnu/12/../../../i386-gnu/crti.o /usr/lib/gcc/i686- > gnu/12/crtbeginT.o -L/usr/lib/gcc/i686-gnu/12 -L/usr/lib/gcc/i686- > gnu/12/../../../i386-gnu -L/usr/lib/gcc/i686-gnu/12/../../.. - > L/lib/i386-gnu -L/usr/lib/i386-gnu test.o --start-group -lgcc -lgcc_eh > -lc --end-group /usr/lib/gcc/i686-gnu/12/crtend.o /usr/lib/gcc/i686- > gnu/12/../../../i386-gnu/crtn.o > > So this is using Scrt1.o A static PIE should use rcrt1.o. If you pass the correct -static-pie option to GCC, GCC will use it. -- Xi Ruoyao <xry...@xry111.site> School of Aerospace Science and Technology, Xidian University