Lohit raj's questions

我正在安装 protobuf-c 1.3.2

./configure 之后显示

    protobuf-c 1.3.2

        CC:                     gcc
        CFLAGS:                 -g -O2
        CXX:                    g++ -std=c++11
        CXXFLAGS:               -g -O2
        LDFLAGS:                
        LIBS:                   

        prefix:                 /usr/local
        sysconfdir:             ${prefix}/etc
        libdir:                 ${exec_prefix}/lib
        includedir:             ${prefix}/include
        pkgconfigdir:           ${libdir}/pkgconfig

        bigendian:              no
        protobuf version:       libprotoc 3.8.0

但pkg-config --cflags 'libprotobuf >= 1.0.0'不工作。它说

Package libprotobuf was not found in the pkg-config search path.
Perhaps you should add the directory containing `libprotobuf.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libprotobuf' found

pkg-config --variable pc_path pkg-config节目

/usr/local/lib/x86_64-linux-gnu/pkgconfig:/usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/lib/x86_64-linux-gnu/pkgconfig:/usr/lib/pkgconfig:/usr/share/pkgconfig