# topdir: EpollShim-0.20241207
%global debug_package %{nil}

Name:           EpollShim
Version:        0.20241207
Release:        1%{?dist}
Summary:        Small epoll implementation using kqueue

License:        MIT
URL:            https://github.com/jiixyj/epoll-shim
Source0:        https://github.com/jiixyj/epoll-shim/archive/18159584bb3d17e601b9315a7398ace018251bdc.tar.gz#/EpollShim-%{version}.tar.gz

Group:          Development/Libraries
Packager:       openEuler Builder <builder@openeuler.org>

%description
epoll-shim is a small library that implements epoll on top of kqueue.
On Linux, where epoll is natively available, this package provides
compatibility headers and build integration files for cross-platform
projects that detect epoll-shim via pkg-config or CMake find_package.

%package devel
Summary:        Development files for %{name}
Group:          Development/Libraries
Packager:       openEuler Builder <builder@openeuler.org>
Provides:       %{name}-static = %{version}-%{release}
Provides:       epoll-shim-devel = %{version}-%{release}
Provides:       pkgconfig(epoll-shim)
Provides:       cmake(epoll-shim)

%description devel
Header files, pkgconfig, and CMake configuration for %{name}.
On Linux, epoll is natively available; this package provides the
shim headers and build integration files for cross-platform projects
that unconditionally detect epoll-shim.

%prep
%autosetup -n %{name}-%{version} -p1

%build
# On Linux, epoll is natively available. epoll-shim's CMakeLists.txt
# creates INTERFACE-only targets (no .so) and returns early, skipping
# all install rules. No compilation is needed — the library code uses
# kqueue which is BSD/macOS-only.

%install
# CMake install is a no-op on Linux (early return in CMakeLists.txt).
# Manually install headers, pkgconfig, and CMake config files.
mkdir -p %{buildroot}%{_includedir}/libepoll-shim/sys
mkdir -p %{buildroot}%{_includedir}/libepoll-shim/epoll-shim/detail
mkdir -p %{buildroot}%{_libdir}/pkgconfig
mkdir -p %{buildroot}%{_libdir}/cmake/epoll-shim

# Install headers (substitute @POLLRDHUP_VALUE@ with 0x2000 on Linux)
# On Linux, HAVE_EVENTFD and HAVE_TIMERFD are true, so sys/eventfd.h
# and sys/timerfd.h are not installed (Linux provides them natively).
sed 's/@POLLRDHUP_VALUE@/0x2000/g' include/sys/epoll.h \
  > %{buildroot}%{_includedir}/libepoll-shim/sys/epoll.h
install -p -m 644 include/sys/signalfd.h \
  %{buildroot}%{_includedir}/libepoll-shim/sys/signalfd.h
install -p -m 644 include/epoll-shim/detail/common.h \
  %{buildroot}%{_includedir}/libepoll-shim/epoll-shim/detail/common.h
install -p -m 644 include/epoll-shim/detail/poll.h \
  %{buildroot}%{_includedir}/libepoll-shim/epoll-shim/detail/poll.h
install -p -m 644 include/epoll-shim/detail/read.h \
  %{buildroot}%{_includedir}/libepoll-shim/epoll-shim/detail/read.h
install -p -m 644 include/epoll-shim/detail/write.h \
  %{buildroot}%{_includedir}/libepoll-shim/epoll-shim/detail/write.h

# Create pkgconfig files (empty Libs since epoll is native on Linux)
cat > %{buildroot}%{_libdir}/pkgconfig/epoll-shim.pc << PCEOF
prefix=/usr
exec_prefix=\${prefix}
libdir=\${exec_prefix}/%{_lib}
includedir=\${prefix}/include

Name: epoll-shim
URL: https://github.com/jiixyj/epoll-shim
Description: Small epoll implementation using kqueue
Version: %{version}
Cflags: -I\${includedir}/libepoll-shim
PCEOF

cat > %{buildroot}%{_libdir}/pkgconfig/epoll-shim-interpose.pc << PCEOF
prefix=/usr
exec_prefix=\${prefix}
libdir=\${exec_prefix}/%{_lib}
includedir=\${prefix}/include

Name: epoll-shim-interpose
URL: https://github.com/jiixyj/epoll-shim
Description: Small epoll implementation using kqueue (interposing wrapper)
Version: %{version}
Requires: epoll-shim
Cflags: -I\${includedir}/libepoll-shim -DEPOLL_SHIM_DISABLE_WRAPPER_MACROS
PCEOF

# Create CMake config files (INTERFACE IMPORTED targets for Linux)
cat > %{buildroot}%{_libdir}/cmake/epoll-shim/epoll-shim-config.cmake << 'CMEOF'
# epoll-shim CMake config for Linux (INTERFACE-only, epoll is native)
include("${CMAKE_CURRENT_LIST_DIR}/epoll-shim-targets.cmake")
CMEOF

cat > %{buildroot}%{_libdir}/cmake/epoll-shim/epoll-shim-targets.cmake << 'CMEOF'
# On Linux, epoll is natively available. These are INTERFACE IMPORTED
# targets providing include directories for cross-platform compatibility.
set(_IMPORT_PREFIX "/usr")

if(NOT TARGET epoll-shim::epoll-shim)
  add_library(epoll-shim::epoll-shim INTERFACE IMPORTED)
  set_target_properties(epoll-shim::epoll-shim PROPERTIES
    INTERFACE_INCLUDE_DIRECTORIES "${_IMPORT_PREFIX}/include/libepoll-shim")
endif()

if(NOT TARGET epoll-shim::epoll-shim-interpose)
  add_library(epoll-shim::epoll-shim-interpose INTERFACE IMPORTED)
  set_target_properties(epoll-shim::epoll-shim-interpose PROPERTIES
    INTERFACE_INCLUDE_DIRECTORIES "${_IMPORT_PREFIX}/include/libepoll-shim"
    INTERFACE_COMPILE_DEFINITIONS "EPOLL_SHIM_DISABLE_WRAPPER_MACROS")
endif()
CMEOF

cat > %{buildroot}%{_libdir}/cmake/epoll-shim/epoll-shim-config-version.cmake << 'CMEOF'
set(PACKAGE_VERSION "0.20241207")
set(PACKAGE_VERSION_EXACT FALSE)
set(PACKAGE_VERSION_COMPATIBLE TRUE)
set(PACKAGE_VERSION_UNSUITABLE FALSE)
CMEOF

%files devel
%license LICENSE
%doc README.md
%{_includedir}/libepoll-shim/
%{_libdir}/pkgconfig/epoll-shim.pc
%{_libdir}/pkgconfig/epoll-shim-interpose.pc
%{_libdir}/cmake/epoll-shim/

%changelog
* Wed Sep 23 2026 openEuler Builder <builder@openeuler.org> - 0.20241207-1
- Initial package