[MDEV-20233] Linking issue on Redhat 6 Created: 2019-08-01  Updated: 2021-04-26  Resolved: 2021-04-26

Status: Closed
Project: MariaDB Server
Component/s: Compiling, Platform RedHat
Affects Version/s: 10.3.17
Fix Version/s: N/A

Type: Bug Priority: Minor
Reporter: Matthew Goebel Assignee: Marko Mäkelä
Resolution: Won't Fix Votes: 2
Labels: regression
Environment:

Redhat 6 64bit

Attachments: HTML File maria     File rdtsc.patch    
Issue Links:
Problem/Incident
is caused by MDEV-19845 Adaptive spin loops Closed

 Description    

cmake . \
 
	-DMYSQL_DATADIR=/home/mysqldat \
 
	-DCMAKE_INSTALL_PREFIX=/usr/local \
 
	-DWITH_INNOBASE_STORAGE_ENGINE=on \
 
	-DWITH_ARCHIVE_STORAGE_ENGINE=on \
 
	-DMYSQL_UNIX_ADDR=/var/lib/mysql/mysql.sock \
 
	-DWITH_LIBWRAP=on

on redhat 6 results in the following : 10.3.16 compiled just fine...

[ 16%] Building C object unittest/mysys/CMakeFiles/lf-t.dir/lf-t.c.o
 
Linking CXX executable lf-t
 
../../mysys/libmysys.a(my_cpu.c.o): In function `my_cpu_init':
 
/usr/local/src/mariadb-10.3.17/mysys/my_cpu.c:86: undefined reference to `__rdtsc'
 
/usr/local/src/mariadb-10.3.17/mysys/my_cpu.c:88: undefined reference to `__rdtsc'
 
/usr/local/src/mariadb-10.3.17/mysys/my_cpu.c:90: undefined reference to `__rdtsc'
 
collect2: ld returned 1 exit status
 
make[2]: *** [unittest/mysys/lf-t] Error 1
 
make[1]: *** [unittest/mysys/CMakeFiles/lf-t.dir/all] Error 2
 
make: *** [all] Error 2



 Comments   
Comment by Kentaro Hayashi [ 2019-08-02 ]

It was occurred on CentOS 6 (64bit), too. It seems that CentOS 6 (32bit) is not affected.

I'm NOT sure but I guess MDEV-19845: Fix the build on some x86 targets is related.

Comment by Sergey Kokhan [ 2019-08-05 ]

Faced with the same problem and it is because that CentOS 6 and RedHat 6 x86-64 using gcc-4.4.
gcc-4.4 does not have support for rdtsc in x86intrin.h. It was added since gcc-4.5.

This patch helped me solve the problem. rdtsc.patch 

--- ./a/mysys/my_cpu.c<>2019-07-27 20:18:31.000000000 -0400
 
+++ ./b/mysys/my_cpu.c<>2019-08-05 07:16:48.780583139 -0400
 
@@ -31,6 +31,8 @@ unsigned my_cpu_relax_multiplier = 200;
 
 instead of being inlined. Let us fall back to my_timer_cycles(), which
 
 internally invokes rdtsc. */
 
 #  include <my_rdtsc.h>
 
+# elif GCC_VERSION < 4005
 
+#  include <my_rdtsc.h>
 
 # else
 
 #  include <x86intrin.h>
 
 #  define my_timer_cycles __rdtsc

Comment by Marko Mäkelä [ 2020-08-08 ]

Sorry, I did not notice the report until now. This ought to have been caused by MDEV-19845.

If I understand correctly, the 10.4 and later series should be unaffected, because it will require GCC 4.8.5 or later, for sufficient C++11 support.

However, is this fix still needed? Red Hat Enterprise Linux 6 should reach its End of Life (EOL) on November 30, 2020. I am a bit reluctant to add tweaks for very old compilers.

Comment by Matthew Goebel [ 2020-08-10 ]

Hey,

I don't seem to be able to log into the ticket, and probably lost my
password for this setup.

We have migrated off of Redhat Enterprise 6 so ahead and do whatever you
need to do with this.

Thanks,
Matt

–
Matthew Goebel : m <goebel@emunix.emich.edu>goebel@emich.edu : Unix Jockey
@ EMU : Hail Eris
Neo-Student, Net Lurker, Donut consumer, and procrastinating medher...
"Always with the negative waves, Moriarty" - Oddball
"Comfort the troubled, and trouble the comfortable." - Dietrich Bonhoeffer

Comment by Marko Mäkelä [ 2021-04-26 ]

I am closing this, because RHEL 6 (and CentOS 6) have reached their End of Life. It could be possible to work around this by installing a newer compiler on that system. That is what we do in order to be able to build tarballs of MariaDB 10.5 or 10.6 on our CI system.

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