%global commit 3e895b49d05ea07e4c2133156cfa94369e19e409
%global shortcommit %(c=%{commit}; echo ${c:0:7})
%global snapdate 20200325

%global somajor 0

Name:           mikkelsen
Version:        1.0
Release:        1.%{snapdate}git%{shortcommit}%{?dist}
Summary:        Tangent space calculation library (MikkTSpace)

License:        Zlib
URL:            https://github.com/mmikk/MikkTSpace
Source0:        %{url}/archive/%{commit}/MikkTSpace-%{shortcommit}.tar.gz

BuildRequires:  gcc

%description
MikkTSpace is a common standard tangent space calculation library used in
baking tools to produce normal maps. It provides a unified tangent space
suitable for normal map baking, ensuring consistent results across different
tools and applications. The library supports both triangles and quads.

%package        devel
Summary:        Development files for %{name}
Requires:       %{name}%{?_isa} = %{version}-%{release}

%description    devel
Header files for developing applications that use MikkTSpace tangent space
calculation.

%prep
%autosetup -n MikkTSpace-%{commit}

%build
# MikkTSpace has no build system; compile manually
gcc %{optflags} -fPIC -shared -Wl,-soname,libmikktspace.so.%{somajor} \
    -o libmikktspace.so.%{somajor}.0.0 mikktspace.c

ln -s libmikktspace.so.%{somajor}.0.0 libmikktspace.so.%{somajor}
ln -s libmikktspace.so.%{somajor}.0.0 libmikktspace.so

# Also build a static library
gcc %{optflags} -fPIC -c -o mikktspace.o mikktspace.c
ar rcs libmikktspace.a mikktspace.o

%install
install -d %{buildroot}%{_libdir}
install -d %{buildroot}%{_includedir}

install -p -m 0755 libmikktspace.so.%{somajor}.0.0 %{buildroot}%{_libdir}/
ln -s libmikktspace.so.%{somajor}.0.0 %{buildroot}%{_libdir}/libmikktspace.so.%{somajor}
ln -s libmikktspace.so.%{somajor}.0.0 %{buildroot}%{_libdir}/libmikktspace.so

install -p -m 0644 libmikktspace.a %{buildroot}%{_libdir}/
install -p -m 0644 mikktspace.h %{buildroot}%{_includedir}/

%files
%license mikktspace.h
%doc README.md
%{_libdir}/libmikktspace.so.%{somajor}
%{_libdir}/libmikktspace.so.%{somajor}.*

%files devel
%{_includedir}/mikktspace.h
%{_libdir}/libmikktspace.so
%{_libdir}/libmikktspace.a

%changelog
* Tue Feb 11 2025 O3DE Builder <builder@o3de.org> - 1.0-1.20200325git3e895b4
- Initial package of MikkTSpace tangent space calculation library
- Built from git snapshot 3e895b4