Source: ghc Version: 9.4.7-5 Severity: important Tags: patch User: debian-powe...@lists.debian.org Usertags: powerpc X-Debbugs-Cc: debian-powe...@lists.debian.org
Hi, after debugging the segmentation faults with the unregisterised GHC on powerpc for a long time, I finally found the culprit which is the fact that GHC is built to default to the gold linker by default. The gold linker is known to be broken on some architectures which is unlikely to change in the future as the project has been abandoned by Google [1], so it has been long disabled for several architectures in debian/rules by passing the flag --disable-ld-override in EXTRA_CONFIGURE_FLAGS. However, as I learnt today, this only affects the linker choice when building GHC but not the default linker for the actual binary packages which still defaulted to gold in /usr/lib/ghc/lib/settings. As one of the upstream developers explained to me today [2], it's necessary to pass --disable-ld-override in EXTRA_INSTALL_CONFIGURE_FLAGS as well in order to disable gold for the binary distribution, i.e. what will end up in the Debian package. Thus, please modify debian/rules to also include the flag --disable-ld-override in EXTRA_INSTALL_CONFIGURE_FLAGS: --- debian/rules.orig 2024-06-13 11:01:23.450199875 -0700 +++ debian/rules 2024-06-13 11:01:26.318242288 -0700 @@ -76,6 +76,7 @@ # See also https://bugs.debian.org/1056636 ifneq (,$(filter mips mipsel powerpc powerpcspe sparc64, $(DEB_HOST_ARCH))) EXTRA_CONFIGURE_FLAGS += --disable-ld-override + EXTRA_INSTALL_CONFIGURE_FLAGS += --disable-ld-override endif ifneq (,$(filter armhf, $(DEB_HOST_ARCH))) Also attaching a patch. Thanks, Adrian > [1] https://en.wikipedia.org/wiki/Gold_(linker) > [2] https://gitlab.haskell.org/ghc/ghc/-/issues/24986#note_570504 -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
--- debian/rules.orig 2024-06-13 11:01:23.450199875 -0700 +++ debian/rules 2024-06-13 11:01:26.318242288 -0700 @@ -76,6 +76,7 @@ # See also https://bugs.debian.org/1056636 ifneq (,$(filter mips mipsel powerpc powerpcspe sparc64, $(DEB_HOST_ARCH))) EXTRA_CONFIGURE_FLAGS += --disable-ld-override + EXTRA_INSTALL_CONFIGURE_FLAGS += --disable-ld-override endif ifneq (,$(filter armhf, $(DEB_HOST_ARCH)))
