[Packaging][RPM] *.rpm have too much dependencies

[kou]

Describe the bug, including details regarding any error messages, version, and platform.

rpmbuild generates dependency information based of linked shared libraries automatically.

For example, arrow12-libs has the following dependency information:

$ rpm -qpR arrow12-libs-12.0.1-1.el8.x86_64.rpm
brotli
gflags
ld-linux-x86-64.so.2()(64bit)
ld-linux-x86-64.so.2(GLIBC_2.3)(64bit)
libbrotlicommon.so.1()(64bit)
libbrotlidec.so.1()(64bit)
libbrotlienc.so.1()(64bit)
libbz2.so.1()(64bit)
libc.so.6()(64bit)
libc.so.6(GLIBC_2.14)(64bit)
libc.so.6(GLIBC_2.17)(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
libc.so.6(GLIBC_2.28)(64bit)
libc.so.6(GLIBC_2.3)(64bit)
libc.so.6(GLIBC_2.3.2)(64bit)
libc.so.6(GLIBC_2.3.4)(64bit)
libc.so.6(GLIBC_2.4)(64bit)
libc.so.6(GLIBC_2.6)(64bit)
libc.so.6(GLIBC_2.9)(64bit)
libcrypto.so.1.1()(64bit)
libcrypto.so.1.1(OPENSSL_1_1_0)(64bit)
libcurl.so.4()(64bit)
libdl.so.2()(64bit)
libdl.so.2(GLIBC_2.2.5)(64bit)
libgcc_s.so.1()(64bit)
libgcc_s.so.1(GCC_3.0)(64bit)
libgcc_s.so.1(GCC_3.4)(64bit)
libgcc_s.so.1(GCC_7.0.0)(64bit)
liblz4.so.1()(64bit)
libm.so.6()(64bit)
libm.so.6(GLIBC_2.2.5)(64bit)
libm.so.6(GLIBC_2.27)(64bit)
libpthread.so.0()(64bit)
libpthread.so.0(GLIBC_2.12)(64bit)
libpthread.so.0(GLIBC_2.2.5)(64bit)
libpthread.so.0(GLIBC_2.3.2)(64bit)
libre2.so.0()(64bit)
librt.so.1()(64bit)
libsnappy.so.1()(64bit)
libssl.so.1.1()(64bit)
libstdc++.so.6()(64bit)
libstdc++.so.6(CXXABI_1.3)(64bit)
libstdc++.so.6(CXXABI_1.3.5)(64bit)
libstdc++.so.6(CXXABI_1.3.7)(64bit)
libstdc++.so.6(CXXABI_1.3.8)(64bit)
libstdc++.so.6(CXXABI_1.3.9)(64bit)
libstdc++.so.6(GLIBCXX_3.4)(64bit)
libstdc++.so.6(GLIBCXX_3.4.11)(64bit)
libstdc++.so.6(GLIBCXX_3.4.14)(64bit)
libstdc++.so.6(GLIBCXX_3.4.15)(64bit)
libstdc++.so.6(GLIBCXX_3.4.17)(64bit)
libstdc++.so.6(GLIBCXX_3.4.18)(64bit)
libstdc++.so.6(GLIBCXX_3.4.19)(64bit)
libstdc++.so.6(GLIBCXX_3.4.20)(64bit)
libstdc++.so.6(GLIBCXX_3.4.21)(64bit)
libstdc++.so.6(GLIBCXX_3.4.22)(64bit)
libstdc++.so.6(GLIBCXX_3.4.5)(64bit)
libstdc++.so.6(GLIBCXX_3.4.9)(64bit)
libz.so.1()(64bit)
libz.so.1(ZLIB_1.2.0)(64bit)
libzstd
libzstd.so.1()(64bit)
lz4-libs >= 1.8.0
re2
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsXz) <= 5.2-1
rtld(GNU_HASH)
snappy
zlib

If we have libzstd.so.1()(64bit) in it, we don't need to add Requires: libzstd to our arrow.spec explicitly.
But we need Requires: lz4-libs >= 1.8.0 even when we have liblz4.so.1()(64bit) because lz4 version information doesn't exist in liblz4.so.1()(64bit). (If LZ4 uses liblz4.so.2 for LZ4 1.8.0 or later, we don't need Requires: lz4-libs >= 1.8.0.)

The Zstandard dependency is harmless. It's just duplicated. But the gflags dependency is needless because arrow12-libs doesn't use it.

Component(s)

Packaging