#! /bin/bash

# libepoxy
# Source: https://download.gnome.org/sources/libepoxy/1.5/libepoxy-1.5.10.tar.xz
#
# $BUILD = Directory to temporarily install
# $PKGS  = Directory to store built packages
#
# DEPS
# Required:     Mesa or libglvnd
# Recommended:  NONE
# Optional:     Doxygen

# If optimizing, use flags with GCC
export  CFLAGS="-march=native -pipe "
export CFLAGS+="-O3 -Ofast -falign-functions=32 "
export CFLAGS+="-ffat-lto-objects -flto=auto -fno-semantic-interposition "
export CFLAGS+="-mprefer-vector-width=256 "
export LDFLAGS="-flto=auto -Wl,-O2 -Wl,--as-needed "

export PVER="1.5.10"

# If GL is not missing from mesa set -Dglx=yes

# if building on a pure wayland system, add these flags:
export   CFLAGS="-DEGL_NO_X11 -DMESA_EGL_NO_X11_HEADERS" 
export CXXFLAGS="-DEGL_NO_X11 -DMESA_EGL_NO_X11_HEADERS"
# ... and apply patch:
patch -Np1 -i ../patches/libepoxy-mlfs/fallback-to-libOpenGL-when-GLX-is-disabled.patch

meson setup --prefix=/usr \
      -Ddocs=false  \
      -Degl=yes     \
      -Dx11=false    \
      -Dtests=true  \
      -Dglx=no OUT &&
read -p "Compile?" && ninja -C OUT -j2 &&

unset CFLAGS CXXFLAGS

sudo -S DESTDIR=$BUILD ninja -C OUT install &&

cd $BUILD && sudo -S mkdir -v ${BUILD}/install &&
cat > /tmp/slack-desc << "EOF"
# HOW TO EDIT THIS FILE:
# The "handy ruler" below makes it easier to edit a package description.  Line
# up the first '|' above the ':' following the base package name, and the '|'
# on the right side marks the last column you can put a character in.  You must
# make exactly 11 lines for the formatting to be correct.  It's also
# customary to leave one space after the ':' except on otherwise blank lines.

        |-----handy-ruler------------------------------------------------------|
libepoxy: libepoxy (OpenGL function pointer management library)
libepoxy:
libepoxy: Epoxy is a library for handling OpenGL function pointer management.
libepoxy:
libepoxy: Homepage: https://github.com/anholt/libepoxy
libepoxy:
libepoxy:
libepoxy:
libepoxy:
libepoxy:
libepoxy:
EOF
sudo -S mv -v /tmp/slack-desc install/ &&
sudo -S makepkg -l y -c n $PKGS/libepoxy-$PVER-$PSUFFIX &&
sudo -S rm -rf ${BUILD}/*