This patch solves the issue I had with building perl natively on Hurd. It seems PAGE_COPY_THRESHOLD was causing a not properly tested PAGE_COPY_FWD_MAYBE to be used, which caused the error "miniperl: memmove.c:72: memmove: Assertion `len == 0' failed."
OK to apply to wip-hurd? Manolis
From b4ea96e2b8b5c6e8dcfff9d46ccb9f963d338c7d Mon Sep 17 00:00:00 2001 From: Manolis Ragkousis <[email protected]> Date: Fri, 31 Jul 2015 19:08:39 +0300 Subject: [PATCH] gnu: base: Disable bogus code in Hurd's glibc. * gnu/packages/patches/glibc-hurd-libs.patch: New patch. --- gnu/packages/patches/glibc-hurd-libs.patch | 31 ++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/gnu/packages/patches/glibc-hurd-libs.patch b/gnu/packages/patches/glibc-hurd-libs.patch index 2102f77..73e1e99 100644 --- a/gnu/packages/patches/glibc-hurd-libs.patch +++ b/gnu/packages/patches/glibc-hurd-libs.patch @@ -41,3 +41,34 @@ Index: eglibc-2.18/sysdeps/generic/symbol-hacks.h asm ("memset = __GI_memset"); +# endif #endif + +We need to disable this, or else memmove will not work properly in Hurd's glibc. + +From 69f807d6a4afa43e7a596e04f22923567b235ce9 Mon Sep 17 00:00:00 2001 +From: Samuel Thibault <[email protected]> +Date: Wed, 29 Jul 2015 10:34:01 +0200 +Subject: [PATCH] Disable the fix for now, the resulting code seems bogus + +--- + .topmsg | 11 +++++++++++ + sysdeps/mach/pagecopy.h | 3 +++ + 2 files changed, 14 insertions(+) + +diff --git a/sysdeps/mach/pagecopy.h b/sysdeps/mach/pagecopy.h +index 29b73ce..9d1f4de 100644 +--- a/sysdeps/mach/pagecopy.h ++++ b/sysdeps/mach/pagecopy.h +@@ -20,7 +20,10 @@ + + /* Threshold at which vm_copy is more efficient than well-optimized copying + by words. This parameter should be tuned as necessary. */ ++#define PAGE_THRESHOLD (16384) /* XXX Tune this. */ ++#if 0 + #define PAGE_COPY_THRESHOLD (16384) /* XXX Tune this. */ ++#endif + + #define PAGE_SIZE __vm_page_size + #define PAGE_COPY_FWD(dstp, srcp, nbytes_left, nbytes) \ +-- +2.4.6 + -- 2.4.6
