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%define oname nanopb
Name: libnanopb
Version: 0.4.6
Release: alt1

Summary: Nanopb - Protocol Buffers for Embedded Systems

License: BSD-like
Group: System/Libraries
Url: https://jpa.kapsi.fi/nanopb/

# Source-url: https://github.com/nanopb/nanopb/archive/%version/%oname-%version.tar.gz
Source: %name-%version.tar

BuildRequires(pre): rpm-macros-cmake
BuildRequires(pre): rpm-build-python3
BuildRequires: cmake python3

BuildRequires: protobuf-compiler

%description
Nanopb is a small code-size Protocol Buffers implementation in ANSI C.
It is especially suitable for use in microcontrollers, but fits any
memory restricted system.

%package devel
Summary: Header files for Nanopb library
Group: Development/C
Requires: %name = %EVR

%description devel
Header files for Nanopb library.


%prep
%setup
subst "s|PythonInterp 2.7|PythonInterp 3|" CMakeLists.txt

%build
%cmake \
-DBUILD_SHARED_LIBS=ON \
-DBUILD_STATIC_LIBS=OFF \
-Dnanopb_BUILD_GENERATOR=OFF \
-DCMAKE_C_FLAGS=-DPB_ENABLE_MALLOC=1 -DPB_NO_PACKED_STRUCTS=1 \
-DCMAKE_POSITION_INDEPENDENT_CODE=ON

%cmake_build

%install
%cmakeinstall_std
#rm -rv %buildroot/usr/lib/python3/site-packages/

%files
%doc AUTHORS.txt CHANGELOG.txt LICENSE.txt README.md
%_libdir/libprotobuf-nanopb.so.0

%files devel
%doc docs/{*.md,*.css,logo}
%_bindir/nanopb_generator.py
%_bindir/protoc-gen-nanopb
%_libdir/libprotobuf-nanopb.so
%_includedir/pb*.h
%_libdir/cmake/nanopb/

%changelog
…
Full changelog you can see here