use gcc8 to build otel in opensuse-leap

Author: scotthart

ci/cloudbuild/dockerfiles/demo-opensuse-leap.Dockerfile

@@ -27,17 +27,42 @@ ARG NCPU=4
 # ```bash
 RUN zypper refresh && \
     zypper install --allow-downgrade -y automake cmake curl \
-        gcc gcc-c++ gcc8 gcc8-c++ git gzip libtool make patch tar wget
+        gcc8 gcc8-c++ git gzip libtool make patch tar wget
 # ```
 
+RUN zypper refresh && \
+    zypper install --allow-downgrade -y gdb
+
+#RUN zypper refresh && \
+#    zypper install --allow-downgrade -y krb5-debuginfo-1.20.1-150600.11.14.1.x86_64 \
+#    libabsl2401_0_0-debuginfo-20240116.3-150600.19.3.15.x86_64  \
+#    libbrotlidec1-debuginfo-1.0.7-150200.3.5.1.x86_64  \
+#    libcares2-debuginfo-1.19.1-150000.3.26.1.x86_64  \
+#    libcom_err2-debuginfo-1.47.0-150600.4.6.2.x86_64  \
+#    libcrc32c1-debuginfo-1.1.2-150400.9.3.1.x86_64  \
+#    libcurl4-debuginfo-8.14.1-150600.4.31.1.x86_64  \
+#    libgcc_s1-debuginfo-15.2.0+git10201-150000.1.3.3.x86_64  \
+#    libgrpc++1_60-debuginfo-1.60.0-150600.15.3.1.x86_64  \
+#    libgrpc37-debuginfo-1.60.0-150600.15.3.1.x86_64  \
+#    libidn2-0-debuginfo-2.2.0-3.6.1.x86_64  \
+#    libjitterentropy3-debuginfo-3.4.1-150000.1.12.1.x86_64  \
+#    libkeyutils1-debuginfo-1.6.3-5.6.1.x86_64  \
+#    libldap-2_4-2-debuginfo-2.4.46-150600.23.21.x86_64  \
+#    libnghttp2-14-debuginfo-1.40.0-150600.23.2.x86_64  \
+#    libopenssl3-debuginfo-3.1.4-150600.5.39.1.x86_64 libpcre2-8-0-debuginfo-10.42-150600.1.26.x86_64 libprotobuf25_1_0-debuginfo-25.1-150600.16.13.1.x86_64 libpsl5-debuginfo-0.20.1-150000.3.3.1.x86_64 libre2-11-debuginfo-20240201-150600.14.2.x86_64 libsasl2-3-debuginfo-2.1.28-150600.7.14.1.x86_64 libselinux1-debuginfo-3.5-150600.3.3.1.x86_64 libstdc++6-debuginfo-15.2.0+git10201-150000.1.3.3.x86_64 libunistring2-debuginfo-0.9.10-1.1.x86_64 libupb37-debuginfo-1.60.0-150600.15.3.1.x86_64 libz1-debuginfo-1.2.13-150500.4.3.1.x86_64 libzstd1-debuginfo-1.5.5-150600.1.3.x86_64
+
 # Install some of the dependencies for `google-cloud-cpp`.
 
 # ```bash
+#RUN zypper refresh && \
+#    zypper install --allow-downgrade -y c-ares-devel \
+#        libcurl-devel libopenssl-devel libcrc32c-devel nlohmann_json-devel
+# ```
+
 RUN zypper refresh && \
     zypper install --allow-downgrade -y abseil-cpp-devel c-ares-devel \
         libcurl-devel libopenssl-devel libcrc32c-devel nlohmann_json-devel \
         grpc-devel libprotobuf-devel
-# ```
 
 # The following steps will install libraries and tools in `/usr/local`. openSUSE
 # does not search for shared libraries in these directories by default. There
@@ -50,6 +75,100 @@ ENV PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/usr/local/lib64/pkgconfig
 ENV PATH=/usr/local/bin:${PATH}
 # ```
 
+# Use the following environment variables to configure the compiler used by
+# CMake.
+
+#ENV CC=gcc-8
+#ENV CXX=g++-8
+
+# #### Abseil
+
+# ```bash
+#WORKDIR /var/tmp/build/abseil-cpp
+#RUN curl -fsSL https://github.com/abseil/abseil-cpp/archive/20250127.1.tar.gz | \
+#    tar -xzf - --strip-components=1 && \
+#    cmake \
+#      -DCMAKE_BUILD_TYPE=Release \
+#      -DCMAKE_CXX_STANDARD=17 \
+#      -DABSL_BUILD_TESTING=OFF \
+#      -DABSL_PROPAGATE_CXX_STD=ON \
+#      -DBUILD_SHARED_LIBS=yes \
+#      -S . -B cmake-out && \
+#    cmake --build cmake-out -- -j ${NCPU:-4} && \
+#    cmake --build cmake-out --target install -- -j ${NCPU:-4} && \
+#    ldconfig
+# ```
+
+# #### Protobuf
+
+# Unless you are only using the Google Cloud Storage library the project
+# needs Protobuf and gRPC. Unfortunately the version of Protobuf that ships
+# with Debian 11 is not recent enough to support the protos published by
+# Google Cloud. We need to build from source:
+
+# ```bash
+#WORKDIR /var/tmp/build/protobuf
+#RUN curl -fsSL https://github.com/protocolbuffers/protobuf/archive/v31.1.tar.gz | \
+#    tar -xzf - --strip-components=1 && \
+#    cmake \
+#        -DCMAKE_BUILD_TYPE=Release \
+#        -DCMAKE_CXX_STANDARD=17 \
+#        -DBUILD_SHARED_LIBS=yes \
+#        -Dprotobuf_BUILD_TESTS=OFF \
+#        -Dprotobuf_ABSL_PROVIDER=package \
+#        -S . -B cmake-out && \
+#    cmake --build cmake-out --target install -- -j ${NCPU:-4} && \
+#    ldconfig
+# ```
+
+# #### RE2
+
+# The version of RE2 included with this distro hard-codes C++11 in its
+# pkg-config file. You can skip this build and use the system's package if
+# you are not planning to use pkg-config.
+
+# ```bash
+#WORKDIR /var/tmp/build/re2
+#RUN curl -fsSL https://github.com/google/re2/archive/2025-07-22.tar.gz | \
+#    tar -xzf - --strip-components=1 && \
+#    cmake -DCMAKE_BUILD_TYPE=Release \
+#        -DCMAKE_CXX_STANDARD=17 \
+#        -DBUILD_SHARED_LIBS=ON \
+#        -DRE2_BUILD_TESTING=OFF \
+#        -S . -B cmake-out && \
+#    cmake --build cmake-out -- -j ${NCPU:-4} && \
+#    cmake --build cmake-out --target install -- -j ${NCPU:-4} && \
+#    ldconfig
+# ```
+
+# #### gRPC
+
+# Finally, we build gRPC from source:
+
+# ```bash
+#WORKDIR /var/tmp/build/grpc
+#RUN curl -fsSL https://github.com/grpc/grpc/archive/v1.74.1.tar.gz | \
+#    tar -xzf - --strip-components=1 && \
+#    cmake \
+#        -DCMAKE_BUILD_TYPE=Release \
+#        -DCMAKE_CXX_STANDARD=17 \
+#        -DBUILD_SHARED_LIBS=yes \
+#        -DgRPC_INSTALL=ON \
+#        -DgRPC_BUILD_TESTS=OFF \
+#        -DgRPC_ABSL_PROVIDER=package \
+#        -DgRPC_CARES_PROVIDER=package \
+#        -DgRPC_PROTOBUF_PROVIDER=package \
+#        -DgRPC_RE2_PROVIDER=package \
+#        -DgRPC_SSL_PROVIDER=package \
+#        -DgRPC_ZLIB_PROVIDER=package \
+#        -S . -B cmake-out && \
+#    cmake --build cmake-out --target install -- -j ${NCPU:-4} && \
+#    ldconfig
+# ```
+
+ENV CC=gcc-8
+ENV CXX=g++-8
+
 # #### opentelemetry-cpp
 
 # The project has an **optional** dependency on the OpenTelemetry library.
@@ -67,7 +186,6 @@ RUN curl -fsSL https://github.com/open-telemetry/opentelemetry-cpp/archive/v1.24
         -DBUILD_SHARED_LIBS=yes \
         -DWITH_EXAMPLES=OFF \
         -DWITH_STL=CXX17 \
-        -DWITH_ABSEIL=ON \
         -DBUILD_TESTING=OFF \
         -DOPENTELEMETRY_INSTALL=ON \
         -DOPENTELEMETRY_ABI_VERSION_NO=2 \
@@ -76,13 +194,6 @@ RUN curl -fsSL https://github.com/open-telemetry/opentelemetry-cpp/archive/v1.24
     ldconfig
 # ```
 
-# Use the following environment variables to configure the compiler used by
-# CMake.
-
-ENV CXX=g++-8
-
-ENV CC=gcc-8
-
 ## [DONE packaging.md]
 
 WORKDIR /var/tmp/sccache