can not be used when making a shared object; recompile with -fPIC

[chengmo03013106]

Description

I face this error when I got the lasest source of master branch
WARNING: librdkafka-static.a: No static libraries available/enabled for inclusion in self-contained static library librdkafka-static.a: this library will be identical to librdkafka.a
WARNING: librdkafka-static.a: The following libraries were not available as static libraries and need to be linked dynamically: -lm -lcurl -lssl -lcrypto -lz -ldl -lpthread -lrt
cp librdkafka.a librdkafka-static.a
cp librdkafka-dbg.a librdkafka-static-dbg.a
cp librdkafka-static.a librdkafka-static-dbg.a
Generating pkg-config file rdkafka-static.pc
/usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libz.a(crc32.o): relocation R_X86_64_32 against .rodata' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libz.a(deflate.o): relocation R_X86_64_32S against hidden symbol _length_code' can not be used when making a shared object
/usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libz.a(inflate.o): relocation R_X86_64_32S against hidden symbol zcfree' can not be used when making a shared object /usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libz.a(inftrees.o): relocation R_X86_64_32 against .rodata' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libz.a(trees.o): relocation R_X86_64_32S against hidden symbol _length_code' can not be used when making a shared object /usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libz.a(zutil.o): relocation R_X86_64_32 against .rodata.str1.1' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libz.a(inffast.o): relocation R_X86_64_32S against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC

How to reproduce

I run configure as
./configure --prefix=dist/ --disable-shared --enable-static --enable-strip --CPPFLAGS=-fPIC

My env
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.8.5/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/cloog-install --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC)

IMPORTANT: Always try to reproduce the issue on the latest released version (see https://github.com/confluentinc/librdkafka/releases), if it can't be reproduced on the latest version the issue has been fixed.

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