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authorH.J. Lu <hjl.tools@gmail.com>2024-04-23 13:59:50 -0700
committerH.J. Lu <hjl.tools@gmail.com>2024-04-24 04:50:56 -0700
commit46c999741340ea559784c20a45077955b50aca43 (patch)
tree0884060cb97799eb444d0a3659e2709b6d5c683f /config.h.in
parent095067efdf68c8061d6f99a21a0300841bede999 (diff)
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x86: Define MINIMUM_X86_ISA_LEVEL in config.h [BZ #31676]
Define MINIMUM_X86_ISA_LEVEL at configure time to avoid

/usr/bin/ld: …/build/elf/librtld.os: in function `init_cpu_features':
…/git/elf/../sysdeps/x86/cpu-features.c:1202: undefined reference to `_dl_runtime_resolve_fxsave'
/usr/bin/ld: …/build/elf/librtld.os: relocation R_X86_64_PC32 against undefined hidden symbol `_dl_runtime_resolve_fxsave' can not be used when making a shared object
/usr/bin/ld: final link failed: bad value
collect2: error: ld returned 1 exit status

when glibc is built with -march=x86-64-v3 and configured with
--with-rtld-early-cflags=-march=x86-64, which is used to allow ld.so to
print an error message on unsupported CPUs:

Fatal glibc error: CPU does not support x86-64-v3

This fixes BZ #31676.
Reviewed-by: Sunil K Pandey <skpgkp2@gmail.com>
Diffstat (limited to 'config.h.in')
-rw-r--r--config.h.in3
1 files changed, 3 insertions, 0 deletions
diff --git a/config.h.in b/config.h.in
index 69ac450356..c4cc7d3b9a 100644
--- a/config.h.in
+++ b/config.h.in
@@ -285,6 +285,9 @@
 /* Define if x86 ISA level should be included in shared libraries.  */
 #undef INCLUDE_X86_ISA_LEVEL
 
+/* The x86 ISA level.  1 for baseline.  Undefined on non-x86.  */
+#undef MINIMUM_X86_ISA_LEVEL
+
 /* Define if -msahf is enabled by default on x86.  */
 #undef HAVE_X86_LAHF_SAHF