Bug#1050641: gcl: FTBFS on riscv64: Unknown reloc type 57
Source: gcl
Version: 2.6.14-4
Severity: important
Tags: ftbfs
User: debian-riscv@lists.debian.org
Usertags: riscv64
X-Debbugs-Cc: debian-riscv@lists.debian.org
Dear maintainer,
gcl fails to build from source on riscv64 while it was building in the
past. This is the relevant part of the build log:
| echo '(load "../tkl.o")(TK::GET-AUTOLOADS (directory "*.lisp"))' | ../../unixport/saved_gcl)
| GCL (GNU Common Lisp) 2.6.14 Fri Jan 13 10:47:56 AM EST 2023 CLtL1 profiling git: Version_2_6_15pre3
| Source License: LGPL(gcl,gmp), GPL(unexec,bfd,xgcl)
| Binary License: GPL due to GPL'ed components: (XGCL UNEXEC)
| Modifications of this banner must retain notice of a compatible license
| Dedicated to the memory of W. Schelter
|
| Use (help) to get some basic information on how to use GCL.
| Temporary directory for compiler files:
| /tmp/
|
| >;; Loading "../tkl.o"
| Unknown reloc type 57
|
| Error: ERROR "The assertion !emsg(\"Unknown reloc type %lu\\n\", tp) on line 186 of sfaslelf.c in function relocate failed: Success"
| Fast links are on: do (si::use-fast-links nil) for debugging
| Signalled by LOAD.
| ERROR "The assertion !emsg(\"Unknown reloc type %lu\\n\", tp) on line 186 of sfaslelf.c in function relocate failed: Success"
|
| Broken at LOAD. Type :H for Help.
| 1 Return to top level.
| >>
| Error: UNDEFINED-FUNCTION :NAME TK::GET-AUTOLOADS
| Fast links are on: do (si::use-fast-links nil) for debugging
| Signalled by LOAD.
|
| UNDEFINED-FUNCTION :NAME TK::GET-AUTOLOADS
|
| Broken at LOAD.
| 1 (abort) Return to debug level 1.
| 2 Return to top level.
| >>>make[2]: *** [makefile:24: all] Error 255
| make[2]: Leaving directory '/<<PKGBUILDDIR>>/gcl-tk'
| make[1]: *** [makefile:114: do-gcl-tk] Error 2
| rm h/mcompdefs.h
| make[1]: Leaving directory '/<<PKGBUILDDIR>>'
| make: *** [debian/rules:122: build-gprof-stamp] Error 2
| dpkg-buildpackage: error: debian/rules build-arch subprocess returned exit status 2
The full build log is available there:
https://buildd.debian.org/status/fetch.php?pkg=gcl&arch=riscv64&ver=2.6.14-4&stamp=1692963268&raw=0
I have tracked down the issue to the switch to gcc-13, which enabled
-fasynchronous-unwind-tables by default at the upstream level. This
causes a new section .rela.eh_frame to be added, using various type of
relocations that are not handled by GCL.
As a first test I have tried just ignore those relocations with the
following patch, which allowed me to build GCL successfully:
--- gcl-2.6.14.orig/h/elf64_riscv64_reloc.h
+++ gcl-2.6.14/h/elf64_riscv64_reloc.h
@@ -28,3 +28,15 @@
case R_RISCV_32:
store_val(where,MASK(32),(s+a));
break;
+
+ /* Relocations for .rela.eh_frame */
+ case R_RISCV_32_PCREL:
+ case R_RISCV_ADD32:
+ case R_RISCV_SET6:
+ case R_RISCV_SET8:
+ case R_RISCV_SET16:
+ case R_RISCV_SUB6:
+ case R_RISCV_SUB8:
+ case R_RISCV_SUB16:
+ case R_RISCV_SUB32:
+ break;
It's not clear to me if it is safe to do so, or if we should add the
code for these relocations. Or maybe just ignore the .rela.eh_frame
section.
Regards
Aurelien
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