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authorStefan Liebler <stli@linux.ibm.com>2020-12-15 15:18:03 +0100
committerStefan Liebler <stli@linux.ibm.com>2020-12-17 16:18:04 +0100
commit844b4d8b4b937fe6943d2c0c80ce7d871cdb1eb5 (patch)
treee1b9009fe7c5b66a726fb47369b9da4d054521a9 /NEWS
parent29a4db291b1282f4088e549391d86b6b470f22be (diff)
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s390x: Require GCC 7.1 or later to build glibc.
GCC 6.5 fails to correctly build ldconfig with recent ld.so.cache
commits, e.g.:
785969a047ad2f23f758901c6816422573544453
elf: Implement a string table for ldconfig, with tail merging

If glibc is build with gcc 6.5.0:
__builtin_add_overflow is used in
<glibc>/elf/stringtable.c:stringtable_finalize()
which leads to ldconfig failing with "String table is too large".
This is also recognizable in following tests:
FAIL: elf/tst-glibc-hwcaps-cache
FAIL: elf/tst-glibc-hwcaps-prepend-cache
FAIL: elf/tst-ldconfig-X
FAIL: elf/tst-ldconfig-bad-aux-cache
FAIL: elf/tst-ldconfig-ld_so_conf-update
FAIL: elf/tst-stringtable

See gcc "Bug 98269 - gcc 6.5.0 __builtin_add_overflow() with small
uint32_t values incorrectly detects overflow"
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98269)
Diffstat (limited to 'NEWS')
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diff --git a/NEWS b/NEWS
index 0820984547..86e05fb023 100644
--- a/NEWS
+++ b/NEWS
@@ -67,6 +67,8 @@ Changes to build and runtime requirements:
   (and pseudo-terminals are supported), a devpts file system is mounted
   on /dev/pts.  Current systems already meet these requirements.
 
+* s390x requires GCC 7.1 or newer.  See gcc Bug 98269.
+
 Security related changes:
 
   CVE-2020-27618: An infinite loop has been fixed in the iconv program when