Experimental Physics and
Industrial Control System

Geoff,

Janet added this option in 3.14.2 for the GNU loader to disallow
undefined symbols (not just warn about them) when building shared
libraries (see: "man ld").

Probably to avoid a situation where some EPICS core libraries would be
built (with unresolved symbols) without make stumbling, but applications
trying to use these libraries would not be guaranteed to work.

I just rebuild 3.14.2 and don't have problems building it (RedHat 8.0
running GNU ld version 2.13.90.0.2 20020802) - even with the "-z defs".

??!

Ralph

>>>>> "Geoff" == Geoff Savage <[email protected]> writes:

  > This line was added to configure/os/CONFIG.linux-x86.linux-x86 between 
  > R3.14.1 and R3.14.2.

  > SHRLIB_LDFLAGS +=  -shared -z defs

  > I can't find any simple explanation for the need for the -z defs part. 
  > After removing this option base builds on linux.  Any insights?

  > Thanks

  > Geoff

References:

R3.14.2 linker options for building on linux Geoff Savage

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