# This is the recipe.sh script. It is executed by BPM in a temporary directory when compiling a source package
# BPM Expects the source code to be extracted into the automatically created 'source' directory which can be accessed using $BPM_SOURCE
# BPM Expects the output files to be present in the automatically created 'output' directory which can be accessed using $BPM_OUTPUT

# The build function is executed in the source directory
# This function is used to compile the source code
build() {
  mkdir -p build
  cd build

  # Install system binaries to /usr/sbin
  echo "rootsbindir=/usr/sbin" > configparms

  # _FORTIFY_SOURCE=3 can result in testsuite failures. It is instead enabled through --enable-fortify-source
  CFLAGS=${CFLAGS/-Wp,-D_FORTIFY_SOURCE=3/}

  ../configure --prefix=/usr                  \
              --with-headers=/usr/include     \
              --enable-bind-now               \
              --enable-fortify-source         \
              --enable-kernel=5.4             \
              --enable-cet                    \
              --enable-stack-protector=strong \
              --enable-multi-arch             \
              --disable-nscd                  \
              --disable-profile               \
              --disable-werror                \
              libc_cv_slibdir=/usr/lib
  make

  # Generate locales here because localedef does not work in fakeroot
  make -C "$BPM_SOURCE"/localedata objdir="$BPM_SOURCE"/build DESTDIR="${BPM_WORKDIR}"/locales install-locale-files
}

# The check function is executed in the source directory
# This function is used to run tests to verify the package has been compiled correctly
check() {
  # disable tests that cause issues
  sed -i "/\btst-ldconfig-cache /d" elf/Makefile
  sed -i "/\btst-thread-affinity-sched /d" nptl/Makefile
  sed -i '/\btst-resolv-res_init-multi /d' resolv/Makefile
  sed -i '/\btst-resolv-res_init-multi /d' resolv/Makefile

  cd build
  
  # adjust/remove buildflags that cause false-positive testsuite failures
  sed -i 's/-Werror=format-security/-Wformat-security/' config.make   # failure to build testsuite
  sed -i '/CFLAGS/s/-fno-plt//' config.make                           # 27 failures
  sed -i '/CFLAGS/s/-fexceptions//' config.make                       # 1 failure
  
  make check
}

# The package function is executed in the source directory
# This function is used to move the compiled files into the output directory
package() {
  cd build
  
  make DESTDIR="$BPM_OUTPUT" install

  # Fix hardcoded path
  sed '/RTLDLIST=/s@/usr@@g' -i "$BPM_OUTPUT"/usr/bin/ldd

  # Install locale-gen script
  install -Dm755 "$BPM_WORKDIR"/locale-gen "$BPM_OUTPUT"/usr/bin/locale-gen

  # Create locale.gen file
  install -dm755 "$BPM_OUTPUT"/etc
  touch "$BPM_OUTPUT"/etc/locale.gen
  sed -e '1,3d' -e 's|/| |g' -e 's|\\| |g' -e 's|^|#|g' "$BPM_SOURCE"/localedata/SUPPORTED >> "$BPM_OUTPUT"/etc/locale.gen

  # Create SUPPORTED file
  install -dm755 "$BPM_OUTPUT"/usr/share/i18n
  sed -e '1,3d' -e 's|/| |g' -e 's| \\||g' "$BPM_SOURCE"/localedata/SUPPORTED > "$BPM_OUTPUT"/usr/share/i18n/SUPPORTED
  
  # Install C.UTF-8 so that it is always available
  install -dm55 "$BPM_OUTPUT"/usr/lib/locale
  cp -r "$BPM_WORKDIR"/locales/usr/lib/locale/C.utf8 -t "$BPM_OUTPUT"/usr/lib/locale
  sed -i '/#C\.UTF-8 /d' "$BPM_OUTPUT"/etc/locale.gen

  # Symlink glibc dynamic linker to /lib64
  install -dm755 "$BPM_OUTPUT"/lib64/
  ln -sf ../lib/ld-linux-x86-64.so.2 "$BPM_OUTPUT"/lib64
  ln -sf ../lib/ld-linux-x86-64.so.2 "$BPM_OUTPUT"/lib64/ld-lsb-x86_64.so.3

  # Install package licenses
  install -Dm644 "$BPM_SOURCE"/LICENSES "$BPM_OUTPUT"/usr/share/licenses/glibc/LICENSES
  install -Dm644 "$BPM_SOURCE"/COPYING* -t "$BPM_OUTPUT"/usr/share/licenses/glibc
}