b2 ignores Iconv and disabled boost-locale lib, even though has_iconv.cpp passed

[hbadger@…]

Building boost from sources git tag 1.62.0 (4f2bdeb93a4be13ba0dc5e9f44920a2bf67191fc) I want to crossbuild it, on linux (ubuntu) host, for Mac OS X target.

Goal: crossbuild the lib boost, with boost-locale

Result: boost says that locale needs either ICU or iconv, and it does not build library for locale.

Expected result: it would build the library for boost locale.

Error messages:

...

• iconv (libc) : no
• iconv (separate) : no

...

• Boost.Locale needs either iconv or ICU library to be built.

... ls stage/lib/ libboost_atomic-mt-s.a libboost_filesystem-mt-s.a libboost_program_options-mt-s.a libboost_system-mt-s.a libboost_thread-mt-s.a libboost_atomic-mt-sd.a libboost_filesystem-mt-sd.a libboost_program_options-mt-sd.a libboost_system-mt-sd.a libboost_thread-mt-sd.a

Environment:

Crosscompiler and it's toolchain is built in /home/ubuntu/build/osxcross/target/bin/ and is proven to work (builds Mach-O executables, they work when copied ontop real Mac OS X).

Mac SDK is available in /home/ubuntu/build/macsdk/MacOSX10.11.sdk/ And it provides the iconv.h file (though I do not see any .a or other file for it - is that ok?)

find /home/ubuntu/build/macsdk/MacOSX10.11.sdk/usr/include | grep iconv /home/ubuntu/build/macsdk/MacOSX10.11.sdk/usr/include/iconv.h

Executed command (in place where I downloaded boost, with needed submodules)

export WITH_ICONV="/home/ubuntu/build/macsdk/MacOSX10.11.sdk/usr/" && git clean -xdf ; git submodule foreach git clean -xdf; ./bootstrap.sh --with-icu && ./b2 headers && export OSX_CPU_ARCH="core2" && export OSX_VERSION_MIN="10.8" && time ./b2 --toolset=clang --build-type=complete --with-filesystem --with-system --with-program_options --with-thread --with-locale cxxflags=-mmacosx-version-min=${OSX_VERSION_MIN} cxxflags=-march=${OSX_CPU_ARCH} target-os=darwin architecture=x86 address-model=64 --layout=tagged link=static runtime-link=static -sNO_BZIP2=1 --sNO_ZLIB=1 --prefix=/home/ubuntu/build/boost/build-osx/ threading=multi boost.locale.icu=off boost.locale.std=off boost.locale.iconv=on -sICONV_PATH="$WITH_ICONV"

Running strace debug (strace b2), I can confirm that Boost does try to build the has_ionv.cpp program, and it seems to work fine. All invocations I seen return with 0 exit code.

E.g:

[pid 22980] execve("/home/ubuntu/build/osxcross/target/bin/x86_64-apple-darwin15-clang++", ["/home/ubuntu/build/osxcross/target/bin/x86_64-apple-darwin15-clang++", "-c", "-x", "c++", "-march=core2", "-mmacosx-version-min=10.8", "-O0", "-g", "-fno-inline", "-Wall", "-g", "-fPIC", "-m64", "-march=core2", "-mmacosx-version-min=10.8", "-DBOOST_ALL_NO_LIB=1", "-I.", "-I/home/ubuntu/build/macsdk/MacOSX10.11.sdk/usr/include", "-o", "bin.v2/libs/locale/build/clang-linux-3.8.0/debug/target-os-darwin/has_iconv_libc_ext.o", "libs/locale/src/../build/has_iconv.cpp"], 22 vars */) = 0

Repeating this test manually also works, creates the .o file, and it is indeed in Mach-O format.

No idea why then it still tells me that iconv was not enabled, and as result does not build locale.

This bug disallows me from at all using Boost until fixed.

[hbadger@…]

Actually, the .tbd library files are there too, in addition to iconv.h

usr/lib/ | grep iconv /home/ubuntu/build/macsdk/MacOSX10.11.sdk/usr/lib/libiconv.2.4.0.tbd /home/ubuntu/build/macsdk/MacOSX10.11.sdk/usr/lib/libiconv.tbd /home/ubuntu/build/macsdk/MacOSX10.11.sdk/usr/lib/libiconv.2.tbd

[hbadger@…]

When forcing build of locale (by editing libs/locale/build/Jamfile.v2 and disabling result += <build>no ; in line 274) I get following errors:

clang-linux.compile.c++.without-pth bin.v2/libs/locale/build/clang-linux-3.8.0/release/boost.locale.iconv-on/boost.locale.icu-off/boost.locale.std-off/link-static/runtime-link-static/target-os-darwin/threading-multi/encoding/codepage.o
libs/locale/src/encoding/codepage.cpp:42:35: error: use of undeclared identifier 'converter_between'; did you mean 'convert_between'?
                    std::auto_ptr<converter_between> cvt;
                                  ^~~~~~~~~~~~~~~~~
                                  convert_between
libs/locale/src/encoding/codepage.cpp:36:29: note: 'convert_between' declared here
                std::string convert_between(char const *begin,
                            ^
libs/locale/src/encoding/codepage.cpp:42:35: error: template argument for template type parameter must be a type
                    std::auto_ptr<converter_between> cvt;
                                  ^~~~~~~~~~~~~~~~~
/home/ubuntu/build/osxcross/target/bin/../SDK/MacOSX10.11.sdk/usr/include/c++/4.2.1/memory:173:21: note: template parameter is declared here
  template<typename _Tp>
                    ^
libs/locale/src/encoding/codepage.cpp:68:35: error: use of undeclared identifier 'converter_to_utf'
                    std::auto_ptr<converter_to_utf<CharType> > cvt;
                                  ^
libs/locale/src/encoding/codepage.cpp:68:52: error: 'CharType' does not refer to a value
                    std::auto_ptr<converter_to_utf<CharType> > cvt;
                                                   ^
libs/locale/src/encoding/codepage.cpp:61:35: note: declared here
                template<typename CharType>
                                  ^
libs/locale/src/encoding/codepage.cpp:68:62: error: expected unqualified-id
                    std::auto_ptr<converter_to_utf<CharType> > cvt;
                                                             ^
libs/locale/src/encoding/codepage.cpp:94:35: error: no template named 'converter_from_utf'; did you mean 'convert_from'?
                    std::auto_ptr<converter_from_utf<CharType> > cvt;
                                  ^~~~~~~~~~~~~~~~~~
                                  convert_from
libs/locale/src/encoding/codepage.cpp:88:29: note: 'convert_from' declared here
                std::string convert_from(
                            ^
libs/locale/src/encoding/codepage.cpp:94:35: error: template argument for template type parameter must be a type
                    std::auto_ptr<converter_from_utf<CharType> > cvt;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/ubuntu/build/osxcross/target/bin/../SDK/MacOSX10.11.sdk/usr/include/c++/4.2.1/memory:173:21: note: template parameter is declared here
  template<typename _Tp>
                    ^
7 errors generated.

[hbadger@…]

If any more information is required, please contact the email, or on IRC chat (freenode server) poke user "rafalcpp" (we can debug it together on a configured box that shows the problem).

[hbadger@…]

Following work-around resolves this problem for me - by advice from jhunold1:

Copy the lines 225 & 226 between 228 and 229.

After this change, the library files are created, and appear correct:

stage/lib/libboost_locale-mt-s.a: current ar archive stage/lib/libboost_locale-mt-sd.a: current ar archive

and unpacked (ar x) :

codecvt.o: Mach-O 64-bit x86_64 object

[hbadger@…]

This above change is to be applied in file libs/locale/build/Jamfile.v2

[hbadger@…]

patch to work around this bug

[hbadger@…]

Hi, I will buy a beer (send 20$ in Bitcoin) to who ever solves this issue if this leads to boost locale working on Mac OS X in crossbuild (so that of course a cross-builded progra using cross-builded libboost can work using boost::locale).

Please notify me on email, thanks. hbadger /at\ protonmail \dot/ com