--- /dev/null
+#
+# Conditional build:
+%bcond_without static_libs # static library
+%bcond_without gomp # OpenMP support
+%bcond_without lcms # LCMS support
+%bcond_with sse # SSE instructions
+#
+%ifarch pentium3 pentium4 %{x8664} x32
+%define with_sse 1
+%endif
+Summary: PNG converter and lossy image compressor
+Summary(pl.UTF-8): Konwerter i stratny kompresor dla plików PNG
+Name: pngquant
+Version: 2.4.1
+Release: 1
+License: BSD
+Group: Libraries
+#Source0Download: https://pngquant.org/releases.html
+Source0: https://pngquant.org/%{name}-%{version}-src.tar.bz2
+# Source0-md5: 2809b10f8d183853c1283cfdfa292ab3
+Patch0: %{name}-soname.patch
+Patch1: %{name}-shared.patch
+URL: https://pngquant.org/
+%{?with_gomp:BuildRequires: gcc >= 6:4.2}
+%{?with_gomp:BuildRequires: libgomp-devel}
+%{?with_lcms:BuildRequires: lcms2-devel >= 2}
+BuildRequires: libpng-devel
+BuildRequires: pkgconfig
+BuildRequires: zlib-devel
+Requires: libimagequant = %{version}-%{release}
+BuildRoot: %{tmpdir}/%{name}-%{version}-root-%(id -u -n)
+
+%description
+PNG converter and lossy image compressor.
+
+%description -l pl.UTF-8
+Konwerter i stratny kompresor dla plików PNG.
+
+%package -n libimagequant
+Summary: Image Quantization library
+Summary(pl.UTF-8): Biblioteka do kwantyzacji obrazów
+Group: Libraries
+URL: https://pngquant.org/lib/
+
+%description -n libimagequant
+Image Quantization library.
+
+%description -n libimagequant -l pl.UTF-8
+Biblioteka do kwantyzacji obrazów.
+
+%package -n libimagequant-devel
+Summary: Header files for libimagequant library
+Summary(pl.UTF-8): Pliki nagłówkowe biblioteki libimagequant
+Group: Development/Libraries
+URL: https://pngquant.org/lib/
+Requires: libimagequant = %{version}-%{release}
+
+%description -n libimagequant-devel
+Header files for libimagequant library.
+
+%description -n libimagequant-devel -l pl.UTF-8
+Pliki nagłówkowe biblioteki libimagequant.
+
+%package -n libimagequant-static
+Summary: Static libimagequant library
+Summary(pl.UTF-8): Statyczna biblioteka libimagequant
+Group: Development/Libraries
+URL: https://pngquant.org/lib/
+Requires: libimagequant-devel = %{version}-%{release}
+
+%description -n libimagequant-static
+Static libimagequant library.
+
+%description -n libimagequant-static -l pl.UTF-8
+Statyczna biblioteka libimagequant.
+
+%prep
+%setup -q
+%patch0 -p1
+%patch1 -p1
+
+%build
+# not autoconf configure
+./configure \
+ CC="%{__cc}" \
+ CFLAGS="%{rpmcflags} %{rpmcppflags}" \
+ LDFLAGS="%{rpmldflags}" \
+ --prefix=%{_prefix} \
+ %{?with_sse:--enable-sse} \
+ %{?with_lcms:--with-lcms2} \
+ %{?with_gomp:--with-openmp}
+
+%{__make} -C lib %{!?with_static_libs:shared}
+
+%{__make}
+
+%install
+rm -rf $RPM_BUILD_ROOT
+install -d $RPM_BUILD_ROOT{%{_libdir},%{_includedir}}
+
+%{__make} install \
+ DESTDIR=$RPM_BUILD_ROOT
+
+cp -a lib/libimagequant.so* $RPM_BUILD_ROOT%{_libdir}
+%if %{with static_libs}
+cp -p lib/libimagequant.a $RPM_BUILD_ROOT%{_libdir}
+%endif
+cp -p lib/libimagequant.h $RPM_BUILD_ROOT%{_includedir}
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+%post -n libimagequant -p /sbin/ldconfig
+%postun -n libimagequant -p /sbin/ldconfig
+
+%files
+%defattr(644,root,root,755)
+%doc CHANGELOG COPYRIGHT README.md
+%attr(755,root,root) %{_bindir}/pngquant
+
+%files -n libimagequant
+%defattr(644,root,root,755)
+%doc lib/{COPYRIGHT,MANUAL.md}
+%attr(755,root,root) %{_libdir}/libimagequant.so.0
+
+%files -n libimagequant-devel
+%defattr(644,root,root,755)
+%attr(755,root,root) %{_libdir}/libimagequant.so
+%{_includedir}/libimagequant.h
+
+%if %{with static_libs}
+%files -n libimagequant-static
+%defattr(644,root,root,755)
+%{_libdir}/libimagequant.a
+%endif