Name:       wasi-libc
Summary:    C library implementation for WebAssembly System Interface
Version:    19
Release:    1%{?dist}

License:    Apache-2.0 WITH LLVM-exception AND Apache-2.0 AND MIT AND BSD-2-Clause
URL:        https://github.com/WebAssembly/wasi-libc/
Source:     %{url}/archive/refs/tags/wasi-sdk-%{version}.tar.gz#/%{name}-wasi-sdk-%{version}.tar.gz

Patch:      0001-make-don-t-rebuild-files-on-make-install.patch

# Although this packages provides binaries, they are not targeted
# for the build platform, but for wasm32-wasi.
# See the relevant discussion (for similar case) here:
# https://www.redhat.com/archives/fedora-devel-list/2009-February/msg02261.html
%global     _binaries_in_noarch_packages_terminate_build 0
BuildArch:  noarch

# This contains parts of the musl C library; specify as bundled so we get notified about potentional vulnerabilities
%global     musl_version 1.2.3
Provides:   bundled(musl) = %{musl_version}

BuildRequires:  clang >= 10
BuildRequires:  git
BuildRequires:  llvm >= 10
BuildRequires:  make

%global     toolchain clang
# WASI is a specific architecture; host (build machine) arch flags should not apply by default
%global     build_cflags --target=wasm32-wasi -fstack-protector
# Define cross-compiling prefix
%global     wasi_prefix %{_prefix}/wasm32-wasi
%global     wasi_datadir %{wasi_prefix}/share
%global     wasi_includedir %{wasi_prefix}/include
%global     wasi_libdir %{wasi_prefix}/lib
%global     wasi_make_flags MALLOC_IMPL=emmalloc INSTALL_DIR='%{buildroot}%{wasi_prefix}' SYSROOT='%{_builddir}/sysroot'

%description
WASI Libc is a libc for WebAssembly programs built on top of WASI system calls.
It provides a wide array of POSIX-compatible C APIs, including support for
standard I/O, file I/O, filesystem manipulation, memory management, time,
string, environment variables, program startup, and many other APIs.

%prep
%autosetup -n %{name}-wasi-sdk-%{version} -S git_am

%build
%make_build %{wasi_make_flags}
make %{wasi_make_flags} check-symbols

%install
%make_install %{wasi_make_flags}

%check
# Bundled version checks
xargs test '%{musl_version}' = <libc-top-half/musl/VERSION

%files
%doc README.md
%license LICENSE LICENSE-APACHE LICENSE-APACHE-LLVM LICENSE-MIT
%dir %{wasi_prefix}
%{wasi_datadir}
%{wasi_includedir}
%{wasi_libdir}

%changelog
* Mon Jan 30 2023 Jan Staněk <jstanek@redhat.com> - 19-1
- Initial package