[Boost-bugs] [Boost C++ Libraries] #12962: user overridden cxxflags are not honored for the compilation of some libraries

Subject: [Boost-bugs] [Boost C++ Libraries] #12962: user overridden cxxflags are not honored for the compilation of some libraries
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-04-12 08:42:03

#12962: user overridden cxxflags are not honored for the compilation of some
libraries
-----------------------------+------------------------------
 Reporter:  sascha.kratky@…  |       Type:  Bugs
   Status:  new              |  Milestone:  To Be Determined
Component:  Building Boost   |    Version:  Boost 1.63.0
 Severity:  Problem          |   Keywords:
-----------------------------+------------------------------
 Upon linking `libboost_regex-mt.a` to a shared library I am getting the
 error:

 {{{
 /usr/bin/ld: /usr/local/lib/libboost_regex-mt.a(instances.o): relocation
 R_X86_64_32S against `.rodata' can not be used when making a shared
 object; recompile with -fPIC
 /usr/local/lib/libboost_regex-mt.a: could not read symbols: Bad value
 }}}

 I am building boost with `-fPIC` by running bjam with the following
 options:

 {{{
 ./bjam '-sBUILD=<cflags>-fPIC <cxxflags>-fPIC <linkflags>-fPIC' --without-
 mpi --without-python --without-iostreams --layout=tagged
 link=shared,static
 }}}

 bjam does not seem to honor the `-fPIC` flag upon compilation of
 `libboost_regex-mt`:

 {{{
 gcc.compile.c++ bin.v2/libs/regex/build/gcc-4.8/release/link-static
 /threading-multi/instances.o

     "g++"  -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall
 -pedantic -pthread -m64  -DBOOST_ALL_NO_LIB=1 -DNDEBUG  -I"." -c -o
 "bin.v2/libs/regex/build/gcc-4.8/release/link-static/threading-
 multi/instances.o" "libs/regex/build/../src/instances.cpp"
 }}}

 Looking at the bjam debug log, there seem to be many libraries where user
 overridden cxxflags are not honored for the compilation. These include
 `libboost_math_tr1-mt.a`, `libboost_program_options-mt.a`,
 `libboost_signals-mt.a`, `libboost_locale-mt.a` and others.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12962>
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