Linking against SDK fails when CRT is built as shared object

Describe the bug

When the CRT library is built as a shared object, applications fail to link against the SDK using pkgconfig because the aws-cpp-sdk-core.pc file doesn't include a dependency on the CRT shared libs (I think it should either be in the Libs: or Requires: entries).

This doesn't happen by default when the CRT is built as submodules within the main build (i.e. with BUILD_DEPS=ON) because in that case, CRT is linked statically into the aws-cpp-sdk-core.so file.

Expected Behavior

Applications and libraries can build against the SDK when CRT is linked dynamically.

Current Behavior

The link stage of building a gstreamer library that uses the SDK fails due to the error undefined reference to 'Aws::Crt::ApiAllocator()'. Full build logs:

root@localhost:/src/amazon-s3-gst-plugin# ninja -C build
ninja: Entering directory `build'
[5/12] Compiling C++ object src/libgstawscredentials-1.0.so.p/gstawscredentials.cpp.o
../src/gstawscredentials.cpp: In function ‘void _do_init(GType)’:
../src/gstawscredentials.cpp:223:3: warning: missing initializer for member ‘_GstValueTable::_gst_reserved’ [-Wmissing-field-initializers]
  223 |   };
      |   ^
[6/12] Linking target src/libgstawscredentials-1.0.so
FAILED: src/libgstawscredentials-1.0.so
c++  -o src/libgstawscredentials-1.0.so src/libgstawscredentials-1.0.so.p/gstawscredentials.cpp.o -Wl,--as-needed -Wl,--no-undefined -shared -fPIC -Wl,--start-group -Wl,-soname,libgstawscredentials-1.0.so -Wl,-rpath,/usr/local/lib -Wl,-rpath-link,/usr/local/lib /usr/local/lib/libaws-cpp-sdk-sts.so /usr/local/lib/libaws-cpp-sdk-core.so /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so /usr/lib/x86_64-linux-gnu/libgobject-2.0.so /usr/lib/x86_64-linux-gnu/libglib-2.0.so -Wl,--end-group
/usr/bin/ld: src/libgstawscredentials-1.0.so.p/gstawscredentials.cpp.o: in function `Aws::Endpoint::DefaultEndpointProvider<Aws::Client::GenericClientConfiguration<false>, Aws::Endpoint::BuiltInParameters, Aws::Endpoint::ClientContextParameters>::DefaultEndpointProvider(char const*, unsigned long)':
/usr/local/include/aws/core/endpoint/DefaultEndpointProvider.h:53: undefined reference to `Aws::Crt::ApiAllocator()'
/usr/bin/ld: /usr/local/include/aws/core/endpoint/DefaultEndpointProvider.h:54: undefined reference to `Aws::Crt::ByteCursorFromArray(unsigned char const*, unsigned long)'
/usr/bin/ld: /usr/local/include/aws/core/endpoint/DefaultEndpointProvider.h:53: undefined reference to `Aws::Crt::ByteCursorFromArray(unsigned char const*, unsigned long)'
/usr/bin/ld: /usr/local/include/aws/core/endpoint/DefaultEndpointProvider.h:53: undefined reference to `Aws::Crt::Endpoints::RuleEngine::RuleEngine(aws_byte_cursor const&, aws_byte_cursor const&, aws_allocator*)'
/usr/bin/ld: src/libgstawscredentials-1.0.so.p/gstawscredentials.cpp.o: in function `Aws::Endpoint::DefaultEndpointProvider<Aws::Client::GenericClientConfiguration<false>, Aws::Endpoint::BuiltInParameters, Aws::Endpoint::ClientContextParameters>::~DefaultEndpointProvider()':
/usr/local/include/aws/core/endpoint/DefaultEndpointProvider.h:63: undefined reference to `Aws::Crt::Endpoints::RuleEngine::~RuleEngine()'
/usr/bin/ld: /usr/local/include/aws/core/endpoint/DefaultEndpointProvider.h:63: undefined reference to `Aws::Crt::Endpoints::RuleEngine::~RuleEngine()'
/usr/bin/ld: /usr/local/include/aws/core/endpoint/DefaultEndpointProvider.h:63: undefined reference to `Aws::Crt::Endpoints::RuleEngine::~RuleEngine()'
collect2: error: ld returned 1 exit status
[7/12] Compiling C++ object src/libmultipartuploader.a.p/gsts3multipartuploader.cpp.o
ninja: build stopped: subcommand failed.

Reproduction Steps

The build failure can be reproduced using the below Dockerfile.

Create a file named Dockerfile containing:

FROM public.ecr.aws/lts/ubuntu:22.04

RUN apt-get update && apt-get -y -qq install \
        git curl cmake libcurl4-openssl-dev openssl libssl-dev \
        gstreamer1.0-plugins-base libgstreamer1.0-dev \
        python3-pip python3-setuptools \
    && pip3 install \
        meson ninja

RUN mkdir /crt
WORKDIR /crt
RUN git clone --depth 1 --recurse-submodules https://github.com/awslabs/aws-crt-cpp.git
RUN cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_PREFIX_PATH=/usr/local/lib -DBUILD_SHARED_LIBS=ON aws-crt-cpp
RUN make -j 4  && make install

RUN mkdir /sdk
WORKDIR /sdk
RUN git clone --depth 1 https://github.com/aws/aws-sdk-cpp.git
RUN cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_PREFIX_PATH=/usr/local/lib -DBUILD_DEPS=OFF -DENABLE_TESTING=OFF -DBUILD_SHARED_LIBS=ON -DBUILD_ONLY="s3;sts" aws-sdk-cpp
RUN make -j 4  && make install

RUN mkdir /src
WORKDIR /src
RUN git clone https://github.com/amzn/amazon-s3-gst-plugin.git

WORKDIR /src/amazon-s3-gst-plugin
RUN meson build

ENTRYPOINT /bin/bash

Then run these commands to reproduce the build:

$ docker build -t aws-sdk-cpp-build-issue:latest .
$ docker run -it aws-sdk-cpp-build-issue:latest
(inside container) ninja -C build

Possible Solution

No response

Additional Information/Context

No response

AWS CPP SDK version used

v1.10.30 (but also happens with latest)

Compiler and Version used

gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0

Operating System and version

Ubuntu 22.04

aws / aws-sdk-cpp