libproxy @0.4.17_0+python27: Error building with GCC 4.2

[evanmiller (Evan Miller)]

Log snippet:

:info:build [ 65%] Building CXX object libproxy/CMakeFiles/libproxy.dir/url.cpp.o
:info:build cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libproxy/libproxy/work/build/libproxy && /opt/local/bin/g++-apple-4.2 -D_POSIX_C_SOURCE=200112L -Dlibproxy_EXPORTS -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libproxy/libproxy/work/libproxy-0.4.17 -I/opt/local/include/glib-2.0 -I/opt/local/lib/glib-2.0/include -fvisibility=hidden -pipe -Os -DNDEBUG -I/opt/local/include -D_DARWIN_C_SOURCE=1 -arch ppc -mmacosx-version-min=10.4 -fPIC -o CMakeFiles/libproxy.dir/url.cpp.o -c /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libproxy/libproxy/work/libproxy-0.4.17/libproxy/url.cpp
:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libproxy/libproxy/work/libproxy-0.4.17/libproxy/url.cpp: In member function 'char* libproxy::url::get_pac()':
:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libproxy/libproxy/work/libproxy-0.4.17/libproxy/url.cpp:514: error: 'class std::vector<char, std::allocator<char> >' has no member named 'data'
:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libproxy/libproxy/work/libproxy-0.4.17/libproxy/url.cpp:537: error: 'class std::vector<char, std::allocator<char> >' has no member named 'data'

System info:

:debug:sysinfo Mac OS X 10.4.11 (darwin/8.11.0) arch powerpc
:debug:sysinfo MacPorts 2.7.1
:debug:sysinfo Xcode 2.5
:debug:sysinfo SDK 10.4
:debug:sysinfo MACOSX_DEPLOYMENT_TARGET: 10.4

Environment:

:debug:configure CC='/opt/local/bin/gcc-apple-4.2'
:debug:configure CC_PRINT_OPTIONS='YES'
:debug:configure CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_libproxy/libproxy/work/.CC_PRINT_OPTIONS'
:debug:configure CFLAGS='-pipe -Os -DNDEBUG -I/opt/local/include -D_DARWIN_C_SOURCE=1'
:debug:configure CPATH='/opt/local/include'
:debug:configure CXX='/opt/local/bin/g++-apple-4.2'
:debug:configure CXXFLAGS='-pipe -Os -DNDEBUG -I/opt/local/include -D_DARWIN_C_SOURCE=1'
:debug:configure DEVELOPER_DIR='/Developer'
:debug:configure F90FLAGS='-pipe -Os -m32'
:debug:configure FCFLAGS='-pipe -Os -m32'
:debug:configure FFLAGS='-pipe -Os -m32'
:debug:configure INSTALL='/usr/bin/install -c'
:debug:configure LDFLAGS='-L/opt/local/lib -Wl,-headerpad_max_install_names'
:debug:configure LIBRARY_PATH='/opt/local/lib'
:debug:configure MACOSX_DEPLOYMENT_TARGET='10.4'
:debug:configure OBJC='/opt/local/bin/gcc-apple-4.2'
:debug:configure OBJCFLAGS='-pipe -Os -I/opt/local/include -D_DARWIN_C_SOURCE=1'
:debug:configure OBJCXX='/opt/local/bin/g++-apple-4.2'
:debug:configure OBJCXXFLAGS='-pipe -Os -DNDEBUG -I/opt/local/include -I/opt/local/include -D_DARWIN_C_SOURCE=1'

Full log to follow.

[evanmiller (Evan Miller)]

Complete install log

[evanmiller (Evan Miller)]

libproxy does compile successfully on the same platform with configure.compiler=macports-gcc-7.

[evanmiller (Evan Miller)]

According to this thread:

​https://lists.isocpp.org/std-discussion/2021/08/1372.php

The "data" member of std::vector was not included in Apple GCC 4.2, and was not standardized until C++11.

[kencu (Ken)]

looks like you nailed it. Our usual next step would be to add *.gcc-4.* to the compiler blacklist for the port, referencing this ticket.

[evanmiller (Evan Miller)]

Pull request here: ​https://github.com/macports/macports-ports/pull/11997

[evanmiller (Evan Miller)]

In 2a8dfb96d7ae36a50db7286b04c6f5b26cb3360b/macports-ports (master):

libproxy: blacklist older gcc compilers (​https://github.com/macports/macports-ports/pull/11997)

Closes: #63267

[kencu (Ken)]

std::vector.data first appeared in mainline GCC 4.1, but was absent from Apple GCC 4.2, and not standardized until C++11.

See the complete discussion beginning with the message: ​https://lists.isocpp.org/std-discussion/2021/08/1370.php

[ken-cunningham-webuse]

In ffb07038fe613a2c3df0f8bdeedbe33b1355fc72/macports-ports (master):

libproxy: needs c++11

the previous blacklisting of older gcc versions
was an incomplete fix; it did force gcc7 on PPC,
but with 10.5 Intel, it forces a build with clang-7.0
against the old non-c++11 libstdc++, which fails.

if we use our compiler.cxx_standard, all is well.

see: #63267