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guix: backport glibc patch to prevent redundant librt link

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fanquake 2023-07-12 11:01:54 +01:00
parent e14473299c
commit 8f6f0d81ee
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2 changed files with 55 additions and 1 deletions
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3
contrib/guix/manifest.scm
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@ -558,7 +558,8 @@ inspecting signatures in Mach-O binaries.")
"0azpb9cvnbv25zg8019rqz48h8i2257ngyjg566dlnp74ivrs9vq"))
(patches (search-our-patches "glibc-2.27-riscv64-Use-__has_include-to-include-asm-syscalls.h.patch"
"glibc-2.27-fcommon.patch"
"glibc-2.27-guix-prefix.patch"))))))
"glibc-2.27-guix-prefix.patch"
"glibc-2.27-no-librt.patch"))))))
(packages->manifest
(append

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contrib/guix/patches/glibc-2.27-no-librt.patch Normal file
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@ -0,0 +1,53 @@
This patch can be dropped when we are building with glibc 2.30+.
commit 6e41ef56c9baab719a02f1377b1e7ce7bff61e73
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Feb 8 10:21:56 2019 +0100
rt: Turn forwards from librt to libc into compat symbols [BZ #24194]
As the result of commit 6e6249d0b461b952d0f544792372663feb6d792a
("BZ#14743: Move clock_* symbols from librt to libc."), in glibc 2.17,
clock_gettime, clock_getres, clock_settime, clock_getcpuclockid,
clock_nanosleep were added to libc, and the file rt/clock-compat.c
was added with forwarders to the actual implementations in libc.
These forwarders were wrapped in
#if SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_17)
so that they are not present for newer architectures (such as
powerpc64le) with a 2.17 or later ABI baseline. But the forwarders
were not marked as compatibility symbols. As a result, on older
architectures, historic configure checks such as
AC_CHECK_LIB(rt, clock_gettime)
still cause linking against librt, even though this is completely
unnecessary. It also creates a needless porting hazard because
architectures behave differently when it comes to symbol availability.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
diff --git a/rt/clock-compat.c b/rt/clock-compat.c
index f816973c05..11e71aa890 100644
--- a/rt/clock-compat.c
+++ b/rt/clock-compat.c
@@ -30,14 +30,16 @@
#if HAVE_IFUNC
# undef INIT_ARCH
# define INIT_ARCH()
-# define COMPAT_REDIRECT(name, proto, arglist) libc_ifunc (name, &__##name)
+# define COMPAT_REDIRECT(name, proto, arglist) libc_ifunc (name, &__##name) \
+ compat_symbol (librt, name, name, GLIBC_2_2);
#else
# define COMPAT_REDIRECT(name, proto, arglist) \
int \
name proto \
{ \
return __##name arglist; \
- }
+ } \
+ compat_symbol (librt, name, name, GLIBC_2_2);
#endif
COMPAT_REDIRECT (clock_getres,