libphonenumber: prepare for llvm 21 (#13930)

ref:
#13915 (comment)

Signed-off-by: David Korczynski <[email protected]>

Author: DavidKorczynski

projects/libphonenumber/Dockerfile

@@ -22,17 +22,13 @@ RUN apt-get update && apt-get install -y autoconf automake \
       libgflags-dev libgoogle-glog-dev libssl-dev \
       protobuf-compiler libtool wget default-jre icu-devtools
 
-RUN apt-get install -y libgtest-dev && \
-    cd /usr/src/googletest/googletest && \
-		mkdir build && \
-		cd build && \
-		cmake .. && \
-		make && \
-		mkdir /usr/local/lib/googletest && \
-		ln -sn /usr/local/lib/googletest/libgtest.a /usr/lib/libgtest.a && \
-		ln -sn /usr/local/lib/googletest/libgtest_main.a /usr/lib/libgtest_main.a && \
-    rm /lib/x86_64-linux-gnu/libgtest.a && \
-    ln -sn /usr/local/lib/googletest/libgtest.a /lib/x86_64-linux-gnu/libgtest.a
+RUN git clone --depth 1 https://github.com/google/googletest && \
+   cd $SRC/googletest && \
+   mkdir build && \
+   cd build && \
+   cmake .. && \
+   make -j$(nproc) && \
+   make install
 RUN wget https://github.com/unicode-org/icu/releases/download/release-66-rc/icu4c-66rc-src.tgz && \
     tar xzvf icu4c-66rc-src.tgz
 RUN git clone https://github.com/google/protobuf.git && \

projects/libphonenumber/build.sh

@@ -15,7 +15,7 @@
 #
 ################################################################################
 
-export CXXFLAGS="$CXXFLAGS -std=c++14"
+export CXXFLAGS="$CXXFLAGS -std=c++17"
 
 # For coverage build we need to remove some flags when building protobuf and icu
 if [ "$SANITIZER" = "coverage" ]
@@ -69,7 +69,7 @@ fi
 # Build libphonenumber
 cd $SRC/libphonenumber/cpp
 sed -i 's/set (BUILD_SHARED_LIB true)/set (BUILD_SHARED_LIB false)/g' CMakeLists.txt
-sed -i 's/set(CMAKE_CXX_STANDARD 11/set(CMAKE_CXX_STANDARD 14/g' CMakeLists.txt
+sed -i 's/set(CMAKE_CXX_STANDARD 11/set(CMAKE_CXX_STANDARD 17/g' CMakeLists.txt
 sed -i 's/list (APPEND CMAKE_C_FLAGS "-pthread")/string (APPEND CMAKE_C_FLAGS " -pthread")/g' CMakeLists.txt
 sed -i 's/# Safeguarding/find_package(absl REQUIRED) # Safeguarding/g' CMakeLists.txt