[geos-devel] 3.9.0beta + GEOSwift + Linux

[Andrew Hershberger]

Seems like the macOS builds are getting their <vector> from llvm's libc++
but that the build in the Swift Docker container is using the GNU C++.
LLVM's vector
(Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/vector)
imports algorithm. The GNU C++ version doesn't (at least not directly). I
find this Swift Package Manager behavior on Linux strange because the
GEOSwift/geos package definition specifically requests "cxx11" (as opposed
to "gnucxx11"). I'll see whether someone from the Swift team can shed
some light on what's going on here.

On Mon, Nov 30, 2020 at 11:40 PM Andrew Hershberger <
andrew.d.hershberger at gmail.com> wrote:

> That works. I had to add it to KdTree.cpp as well. Agree that it's strange.
>
> On Mon, Nov 30, 2020 at 9:17 PM Paul Ramsey <pramsey at cleverelephant.ca>
> wrote:
>
>>
>>
>> > On Nov 30, 2020, at 7:15 PM, Andrew Hershberger <
>> andrew.d.hershberger at gmail.com> wrote:
>> >
>> > Found another issue with the beta when testing GEOSwift on Linux
>> (specifically, compiling in a Docker container using the Swift Docker
>> image). Here's what I'm doing:
>> >
>> > $ sudo docker run -it --rm swift /bin/bash
>> > # cd home
>> > # git clone https://github.com/GEOSwift/GEOSwift.git
>> > # cd GEOSwift
>> > # git checkout geos-3.9.0-testing
>> > # swift test --enable-test-discovery -v
>> >
>> > Among other things, this yields the following line for LineLimiter.cpp:
>> >
>> > /usr/bin/clang -target x86_64-unknown-linux-gnu -fPIC -g -O0
>> -DSWIFT_PACKAGE=1 -DDEBUG=1 -fblocks -fmodules -fmodule-name=geos -I
>> /home/GEOSwift/.build/checkouts/geos/Sources/geos/public
>> -fmodules-cache-path=/home/GEOSwift/.build/x86_64-unknown-linux-gnu/debug/ModuleCache
>> -DUSE_UNSTABLE_GEOS_CPP_API
>> -I/home/GEOSwift/.build/checkouts/geos/Sources/geos/include -MD -MT
>> dependencies -MF
>> /home/GEOSwift/.build/x86_64-unknown-linux-gnu/debug/geos.build/src/operation/overlayng/LineLimiter.cpp.d
>> -std=c++11 -c
>> /home/GEOSwift/.build/checkouts/geos/Sources/geos/src/operation/overlayng/LineLimiter.cpp
>> -o
>> /home/GEOSwift/.build/x86_64-unknown-linux-gnu/debug/geos.build/src/operation/overlayng/LineLimiter.cpp.o
>> >
>> > And this corresponding error:
>> >
>> >
>> /home/GEOSwift/.build/checkouts/geos/Sources/geos/src/operation/overlayng/LineLimiter.cpp:121:24:
>> error: no member named 'unique' in namespace 'std'
>> >     ptList->erase(std::unique(ptList->begin(), ptList->end()),
>> ptList->end());
>>
>> Add #include <algorithm>
>> to LineLimiter.cpp see if that helps?
>>
>> Not sure why only your version would have this problem. Maybe it's in
>> different headers sometimes?
>>
>>
>> >                   ~~~~~^
>> >
>> > Here's some clang version info:
>> >
>> > clang version 10.0.0 (git at github.com:apple/llvm-project.git
>> 3093af41dd65ad466dcd5603e9289244edfee4f5)
>> > Target: x86_64-unknown-linux-gnu
>> > Thread model: posix
>> > InstalledDir: /usr/bin
>> >
>> > Any idea what might be going on here?
>> >
>> > _______________________________________________
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>> > geos-devel at lists.osgeo.org
>> > https://lists.osgeo.org/mailman/listinfo/geos-devel
>>
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>
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