inside docker

glibc.spec

%define glibcpath sclinux-glibc
Name     : fusa-glibc
Version  : 2.27
Release  : 1
Source0  : https://ftp.gnu.org/gnu/libc/sclinux-glibc.tar.gz 
Summary  : GNU C Library
Group    : Development/Tools
License  : BSD-3-Clause BSL-1.0 GFDL-1.2 GFDL-1.3 GPL-2.0 GPL-3.0 LGPL-2.1 LGPL-3.0 MIT
AutoProv : No


%description
GNU C library.

%prep
%setup -q -n %{glibcpath}

%build

rm -rf build
mkdir build
cd build

../configure \
    --prefix=%{buildroot}/opt/glibc \
    --with-pkgversion='FuSa Clear Linux OS for Intel Architecture'\
    --disable-werror\
    CFLAGS="-O2 -U_FORTIFY_SOURCE"

make %{?_smp_mflags} 

#%check
#pushd ../gcc-build
#export CHECK_TEST_FRAMEWORK=1
#make -k  %{?_smp_mflags} check  || :
#popd


%install
cd build
export CPATH=%{buildroot}/opt/glibc/include
export LIBRARY_PATH=%{buildroot}/opt/glibc/lib64
#%make_install
make install
cd -

%files
/opt/glibc/*