Experimental Physics and
Industrial Control System

Sébastien Wertz via Core-talk <core-talk at aps.anl.gov> · Wed, 19 Aug 2020 11:54:20 -0000

Public bug reported:

I am trying to build EPICS base 7.0.4 inside a docker container based on
alpine linux, which uses musl in place of glibc.

The build options used are CXXFLAGS="-DIPPORT_USERRESERVED=5000 -fPIC".

The build fails because the "backtrace" function does not exist in musl:

/usr/bin/g++ -o iocLogServer  -L/EPICS/base/lib/linux-x86_64 -Wl,-rpath,/EPICS/base/lib/linux-x86_64           -rdynamic -m64         iocLogServer.o    -lCom
/usr/lib/gcc/x86_64-alpine-linux-musl/9.2.0/../../../../x86_64-alpine-linux-musl/bin/ld: /EPICS/base/lib/linux-x86_64/libCom.so: undefined reference to `backtrace'
collect2: error: ld returned 1 exit status

Looking into epics-
base/modules/libcom/src/osi/os/posix/osdExecinfoBackTrace.cpp, which is
the only file using that function, I was in the end able to successfully
build EPICS by adding "-D__UCLIBC_MAJOR__=0" to the build options.

However, it would be better to detect the presence of backtrace() by
testing the existence of __GLIBC__ or __GNU_LIBRARY__, or,
alternatively, to provide the user with the possibility of disabling
backtrace support.

** Affects: epics-base
     Importance: Undecided
         Status: New

** Summary changed:

- Building epics-case fails on musl based systems
+ Building epics-base fails on musl based systems

** Description changed:

  I am trying to build EPICS base 7.0.4 inside a docker container based on
  alpine linux, which uses musl in place of glibc.

  The build options used are CXXFLAGS="-DIPPORT_USERRESERVED=5000 -fPIC".

  The build fails because the "backtrace" function does not exist in musl:

- /usr/bin/g++ -o iocLogServer  -L/EPICS/base/lib/linux-x86_64 -Wl,-rpath,/EPICS/base/lib/linux-x86_64           -rdynamic -m64         iocLogServer.o    -lCom   
+ /usr/bin/g++ -o iocLogServer  -L/EPICS/base/lib/linux-x86_64 -Wl,-rpath,/EPICS/base/lib/linux-x86_64           -rdynamic -m64         iocLogServer.o    -lCom
  /usr/lib/gcc/x86_64-alpine-linux-musl/9.2.0/../../../../x86_64-alpine-linux-musl/bin/ld: /EPICS/base/lib/linux-x86_64/libCom.so: undefined reference to `backtrace'
  collect2: error: ld returned 1 exit status

  Looking into epics-
  base/modules/libcom/src/osi/os/posix/osdExecinfoBackTrace.cpp, which is
  the only file using that function, I was in the end able to successfully
  build EPICS by adding "-D__UCLIBC_MAJOR__=0" to the build options.

  However, it would be better to detect the presence of backtrace() by
- testing the existence of __GLIBC__, or, alternatively, to provide the
- user with the possibility of disabling backtrace support.
+ testing the existence of __GLIBC__ or __GNU_LIBRARY__, or,
+ alternatively, to provide the user with the possibility of disabling
+ backtrace support.

-- 
You received this bug notification because you are a member of EPICS
Core Developers, which is subscribed to EPICS Base.
Matching subscriptions: epics-core-list-subscription
https://bugs.launchpad.net/bugs/1892190

Title:
  Building epics-base fails on musl based systems

Status in EPICS Base:
  New

Bug description:
  I am trying to build EPICS base 7.0.4 inside a docker container based
  on alpine linux, which uses musl in place of glibc.

  The build options used are CXXFLAGS="-DIPPORT_USERRESERVED=5000
  -fPIC".

  The build fails because the "backtrace" function does not exist in
  musl:

  /usr/bin/g++ -o iocLogServer  -L/EPICS/base/lib/linux-x86_64 -Wl,-rpath,/EPICS/base/lib/linux-x86_64           -rdynamic -m64         iocLogServer.o    -lCom
  /usr/lib/gcc/x86_64-alpine-linux-musl/9.2.0/../../../../x86_64-alpine-linux-musl/bin/ld: /EPICS/base/lib/linux-x86_64/libCom.so: undefined reference to `backtrace'
  collect2: error: ld returned 1 exit status

  Looking into epics-
  base/modules/libcom/src/osi/os/posix/osdExecinfoBackTrace.cpp, which
  is the only file using that function, I was in the end able to
  successfully build EPICS by adding "-D__UCLIBC_MAJOR__=0" to the build
  options.

  However, it would be better to detect the presence of backtrace() by
  testing the existence of __GLIBC__ or __GNU_LIBRARY__, or,
  alternatively, to provide the user with the possibility of disabling
  backtrace support.

To manage notifications about this bug go to:
https://bugs.launchpad.net/epics-base/+bug/1892190/+subscriptions

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System