glplanet, an OpenGL-based planetary rendererHEADmain

glplanet draws Earth like it currently appears from space, putting
nighttime areas in shadow and daytime areas in light. It’s modeled
after Xplanet (http://xplanet.sourceforge.net/), but whereas Xplanet is
entirely a CPU-resident program, glplanet draws using OpenGL. It’s thus
much less resource-intensive, particularly when using high-resolution
textures.

5 files changed, 535 insertions, 0 deletions

diff --git a/buildconf/asan.ninja b/buildconf/asan.ninja
new file mode 100644
index 0000000..51b26c0
--- /dev/null
+++ b/buildconf/asan.ninja
@@ -0,0 +1,22 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+third_party_cflags = -fsanitize=address
+
+cxxflags = -fsanitize=address -Werror
+third_party_cxxflags = -fsanitize=address
+
+ldflags = -fsanitize=address
+
+subninja buildconf/common.ninja
diff --git a/buildconf/common.ninja b/buildconf/common.ninja
new file mode 100644
index 0000000..0ca45a9
--- /dev/null
+++ b/buildconf/common.ninja
@@ -0,0 +1,447 @@
+# Copyright 2021 Google LLC
+# Copyright 2021, 2022 Benjamin Barenblat
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+ninja_required_version = 1.3
+
+absl = third_party/abseil/absl
+
+common_cflags = -I. -isystem third_party/abseil $
+    -isystem third_party/date/include -isystem third_party/glew/include $
+    -isystem /usr/include/eigen3 -DEIGEN_MPL2_ONLY -DUSE_OS_TZDB $
+    -DUSE_SHELL_API=0 -DGLEW_STATIC -pipe -pthread
+
+third_party_cflags = $common_cflags $third_party_cflags
+
+cxxflags = $common_cflags -std=c++20 -Wall -Wextra -Wno-sign-compare $
+    -fdiagnostics-show-template-tree $cxxflags
+third_party_cxxflags = $common_cflags -std=c++20 $
+    -fdiagnostics-show-template-tree $third_party_cxxflags
+
+# LOCAL ------------------------------------------------------------------------
+cc = gcc
+cxx = g++
+ldflags = -fuse-ld=lld $ldflags
+# ldflags = -fuse-ld=gold $ldflags
+# LOCAL ------------------------------------------------------------------------
+# cc = clang
+# cxx = clang++
+# ldflags = -fuse-ld=lld $ldflags
+# LOCAL ------------------------------------------------------------------------
+
+rule ar
+  command = rm -f $out && ar -rcs $out $in
+  description = Generating $out
+
+rule bin2obj
+  command = ld -r -b binary -o $out $in && objcopy --rename-section $
+      .data=.rodata,alloc,load,readonly,data,contents $out
+  description = Generating $out
+
+rule cc
+  command = $cc -MD -MT $out -MF $out.d -c $in -o $out $cflags
+  description = Compiling $out
+  depfile = $out.d
+  deps = gcc
+
+rule cxx
+  command = $cxx -MD -MT $out -MF $out.d -c $in -o $out $cxxflags
+  description = Compiling $out
+  depfile = $out.d
+  deps = gcc
+
+rule generate_resources_header
+  command = gen/resources_header $resources | clang-format --style=Google >$out
+  description = Generating $out
+
+rule link
+  command = $cxx $ldflags -o $out $in $libs -pthread
+  description = Linking $out
+
+build res/clouds.o: bin2obj res/clouds.webp
+build res/earth.o: bin2obj res/earth.webp
+build res/fragment.o: bin2obj res/fragment.glsl
+build res/vertex.o: bin2obj res/vertex.glsl
+
+build res/res.h: generate_resources_header res | gen/resources_header
+  resources = res/clouds.webp res/earth.webp res/fragment.glsl res/vertex.glsl
+
+build src/astro.o: cxx src/astro.cc
+build src/egl.o: cxx src/egl.cc
+build src/glplanet.o: cxx src/glplanet.cc | res/res.h
+build src/gl/buffer.o: cxx src/gl/buffer.cc
+build src/gl/draw.o: cxx src/gl/draw.cc
+build src/gl/error.o: cxx src/gl/error.cc
+build src/gl/init.o: cxx src/gl/init.cc
+build src/gl/shader.o: cxx src/gl/shader.cc
+build src/gl/texture.o: cxx src/gl/texture.cc
+build src/gl/vertex_array.o: cxx src/gl/vertex_array.cc
+build src/main.o: cxx src/main.cc
+build src/mesh.o: cxx src/mesh.cc
+build src/scene.o: cxx src/scene.cc
+build src/webp.o: cxx src/webp.cc
+build src/x/connection.o: cxx src/x/connection.cc
+build src/x/error.o: cxx src/x/error.cc
+build src/x/event.o: cxx src/x/event.cc
+build src/x/init.o: cxx src/x/init.cc
+build src/x/rpc.o: cxx src/x/rpc.cc
+
+build src/astro_test.o: cxx src/astro_test.cc
+build src/astro_test: link src/astro.o src/astro_test.o $
+    third_party/date/src/tz.a
+  libs = -lgmock_main -lgmock -lgtest -lm
+
+build src/astro_benchmark.o: cxx src/astro_benchmark.cc
+build src/astro_benchmark: link src/astro.o src/astro_benchmark.o $
+    third_party/benchmark/build/src/libbenchmark.a $
+    third_party/benchmark/build/src/libbenchmark_main.a $
+    third_party/date/src/tz.a
+  libs = -lm
+
+build src/mesh_test.o: cxx src/mesh_test.cc
+build src/mesh_test: link src/mesh.o src/mesh_test.o $absl/strings/strings.a $
+    $absl/strings/internal.a $absl/base/base.a $absl/base/spinlock_wait.a $
+    $absl/numeric/int128.a $absl/base/throw_delegate.a $
+    $absl/base/raw_logging_internal.a $absl/base/log_severity.a
+  libs = -lgmock_main -lgmock -lgtest -lrt -lm
+
+build glplanet: link res/clouds.o res/earth.o res/fragment.o res/vertex.o $
+    src/astro.o src/gl/buffer.o src/gl/draw.o src/gl/error.o src/gl/init.o $
+    src/gl/shader.o src/gl/texture.o src/gl/vertex_array.o src/x/connection.o $
+    src/x/error.o src/x/event.o src/x/init.o src/x/rpc.o src/egl.o $
+    src/glplanet.o src/main.o src/mesh.o src/scene.o src/webp.o $
+    $absl/strings/cord.a $absl/strings/cordz_info.a $
+    $absl/strings/cord_internal.a $absl/strings/cordz_functions.a $
+    $absl/profiling/exponential_biased.a $absl/strings/cordz_handle.a $
+    $absl/synchronization/synchronization.a $
+    $absl/synchronization/graphcycles_internal.a $absl/debugging/stacktrace.a $
+    $absl/debugging/symbolize.a $absl/debugging/debugging_internal.a $
+    $absl/debugging/demangle_internal.a $absl/base/malloc_internal.a $
+    $absl/time/time.a $absl/time/civil_time.a $absl/strings/strings.a $
+    $absl/strings/internal.a $absl/base/base.a $absl/base/spinlock_wait.a $
+    $absl/numeric/int128.a $absl/time/time_zone.a $
+    $absl/types/bad_optional_access.a $absl/base/throw_delegate.a $
+    $absl/types/bad_variant_access.a $absl/base/raw_logging_internal.a $
+    $absl/base/log_severity.a third_party/date/src/tz.a $
+    third_party/glew/src/glew.a
+  libs = -lEGL -lGLU -lGL -lX11-xcb -lX11 -lxcb-util -lxcb -lwebp -lm -lrt
+
+# //absl/base
+build $absl/base/base.a: ar $absl/base/internal/cycleclock.o $
+    $absl/base/internal/spinlock.o $absl/base/internal/sysinfo.o $
+    $absl/base/internal/thread_identity.o $
+    $absl/base/internal/unscaledcycleclock.o
+build $absl/base/internal/cycleclock.o: cxx $absl/base/internal/cycleclock.cc
+  cxxflags = $third_party_cxxflags
+build $absl/base/internal/spinlock.o: cxx $absl/base/internal/spinlock.cc
+  cxxflags = $third_party_cxxflags
+build $absl/base/internal/sysinfo.o: cxx $absl/base/internal/sysinfo.cc
+  cxxflags = $third_party_cxxflags
+build $absl/base/internal/thread_identity.o: cxx $
+    $absl/base/internal/thread_identity.cc
+  cxxflags = $third_party_cxxflags
+build $absl/base/internal/unscaledcycleclock.o: cxx $
+    $absl/base/internal/unscaledcycleclock.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/base:log_severity
+build $absl/base/log_severity.a: ar $absl/base/log_severity.o
+build $absl/base/log_severity.o: cxx $absl/base/log_severity.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/base:malloc_internal
+build $absl/base/malloc_internal.a: ar $absl/base/internal/low_level_alloc.o
+build $absl/base/internal/low_level_alloc.o: cxx $
+    $absl/base/internal/low_level_alloc.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/base:raw_logging_internal
+build $absl/base/raw_logging_internal.a: ar $absl/base/internal/raw_logging.o
+build $absl/base/internal/raw_logging.o: cxx $absl/base/internal/raw_logging.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/base:spinlock_wait
+build $absl/base/spinlock_wait.a: ar $absl/base/internal/spinlock_wait.o
+build $absl/base/internal/spinlock_wait.o: cxx $
+    $absl/base/internal/spinlock_wait.cc | $
+    $absl/base/internal/spinlock_linux.inc
+  cxxflags = $third_party_cxxflags
+
+# //absl/base:throw_delegate
+build $absl/base/throw_delegate.a: ar $absl/base/internal/throw_delegate.o
+build $absl/base/internal/throw_delegate.o: cxx $
+    $absl/base/internal/throw_delegate.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/debugging:debugging_internal
+build $absl/debugging/debugging_internal.a: ar $
+    $absl/debugging/internal/address_is_readable.o $
+    $absl/debugging/internal/elf_mem_image.o $
+    $absl/debugging/internal/vdso_support.o
+build $absl/debugging/internal/address_is_readable.o: cxx $
+    $absl/debugging/internal/address_is_readable.cc
+  cxxflags = $third_party_cxxflags
+build $absl/debugging/internal/elf_mem_image.o: cxx $
+    $absl/debugging/internal/elf_mem_image.cc
+  cxxflags = $third_party_cxxflags
+build $absl/debugging/internal/vdso_support.o: cxx $
+    $absl/debugging/internal/vdso_support.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl:debugging:demangle_internal
+build $absl/debugging/demangle_internal.a: ar $
+    $absl/debugging/internal/demangle.o
+build $absl/debugging/internal/demangle.o: cxx $
+    $absl/debugging/internal/demangle.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/debugging:stacktrace
+build $absl/debugging/stacktrace.a: ar $absl/debugging/stacktrace.o
+build $absl/debugging/stacktrace.o: cxx $absl/debugging/stacktrace.cc | $
+    $absl/debugging/internal/stacktrace_config.h $
+    $absl/debugging/internal/stacktrace_x86-inl.inc
+  cxxflags = $third_party_cxxflags
+
+# //absl/debugging:symbolize
+build $absl/debugging/symbolize.a: ar $absl/debugging/symbolize.o
+build $absl/debugging/symbolize.o: cxx $absl/debugging/symbolize.cc | $
+    $absl/debugging/symbolize_elf.inc
+  cxxflags = $third_party_cxxflags
+
+# //absl/numeric:int128
+build $absl/numeric/int128.a: ar $absl/numeric/int128.o
+build $absl/numeric/int128.o: cxx $absl/numeric/int128.cc | $
+    $absl/numeric/int128_have_intrinsic.inc $
+    $absl/numeric/int128_no_intrinsic.inc
+  cxxflags = $third_party_cxxflags
+
+# //absl/profiling:exponential_biased
+build $absl/profiling/exponential_biased.a: ar $
+    $absl/profiling/internal/exponential_biased.o
+build $absl/profiling/internal/exponential_biased.o: cxx $
+    $absl/profiling/internal/exponential_biased.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/strings
+build $absl/strings/strings.a: ar $absl/strings/ascii.o $
+    $absl/strings/charconv.o $absl/strings/escaping.o $
+    $absl/strings/internal/charconv_bigint.o $
+    $absl/strings/internal/charconv_parse.o $absl/strings/internal/memutil.o $
+    $absl/strings/match.o $absl/strings/numbers.o $absl/strings/str_cat.o $
+    $absl/strings/str_replace.o $absl/strings/str_split.o $
+    $absl/strings/string_view.o $absl/strings/substitute.o
+build $absl/strings/ascii.o: cxx $absl/strings/ascii.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/charconv.o: cxx $absl/strings/charconv.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/escaping.o: cxx $absl/strings/escaping.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/internal/charconv_bigint.o: cxx $
+    $absl/strings/internal/charconv_bigint.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/internal/charconv_parse.o: cxx $
+    $absl/strings/internal/charconv_parse.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/internal/memutil.o: cxx $absl/strings/internal/memutil.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/match.o: cxx $absl/strings/match.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/numbers.o: cxx $absl/strings/numbers.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/str_cat.o: cxx $absl/strings/str_cat.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/str_replace.o: cxx $absl/strings/str_replace.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/str_split.o: cxx $absl/strings/str_split.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/string_view.o: cxx $absl/strings/string_view.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/substitute.o: cxx $absl/strings/substitute.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/strings:cord
+build $absl/strings/cord.a: ar $absl/strings/cord.o
+build $absl/strings/cord.o: cxx $absl/strings/cord.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/strings:cord_internal
+build $absl/strings/cord_internal.a: ar $absl/strings/internal/cord_internal.o $
+    $absl/strings/internal/cord_rep_btree.o $
+    $absl/strings/internal/cord_rep_btree_navigator.o $
+    $absl/strings/internal/cord_rep_btree_reader.o $
+    $absl/strings/internal/cord_rep_consume.o $
+    $absl/strings/internal/cord_rep_ring.o
+build $absl/strings/internal/cord_internal.o: cxx $
+    $absl/strings/internal/cord_internal.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/internal/cord_rep_btree.o: cxx $
+    $absl/strings/internal/cord_rep_btree.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/internal/cord_rep_btree_navigator.o: cxx $
+    $absl/strings/internal/cord_rep_btree_navigator.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/internal/cord_rep_btree_reader.o: cxx $
+    $absl/strings/internal/cord_rep_btree_reader.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/internal/cord_rep_consume.o: cxx $
+    $absl/strings/internal/cord_rep_consume.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/internal/cord_rep_ring.o: cxx $
+    $absl/strings/internal/cord_rep_ring.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/strings:cordz_functions
+build $absl/strings/cordz_functions.a: ar $
+    $absl/strings/internal/cordz_functions.o
+build $absl/strings/internal/cordz_functions.o: cxx $
+    $absl/strings/internal/cordz_functions.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/strings:cordz_handle
+build $absl/strings/cordz_handle.a: ar $absl/strings/internal/cordz_handle.o
+build $absl/strings/internal/cordz_handle.o: cxx $
+    $absl/strings/internal/cordz_handle.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/strings:cordz_info
+build $absl/strings/cordz_info.a: ar $absl/strings/internal/cordz_info.o
+build $absl/strings/internal/cordz_info.o: cxx $
+    $absl/strings/internal/cordz_info.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/strings:internal
+build $absl/strings/internal.a: ar $absl/strings/internal/escaping.o $
+    $absl/strings/internal/ostringstream.o $absl/strings/internal/utf8.o
+build $absl/strings/internal/escaping.o: cxx $absl/strings/internal/escaping.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/internal/ostringstream.o: cxx $
+    $absl/strings/internal/ostringstream.cc
+  cxxflags = $third_party_cxxflags
+build $absl/strings/internal/utf8.o: cxx $absl/strings/internal/utf8.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/synchronization
+build $absl/synchronization/synchronization.a: ar $
+    $absl/synchronization/barrier.o $absl/synchronization/blocking_counter.o $
+    $absl/synchronization/internal/create_thread_identity.o $
+    $absl/synchronization/internal/per_thread_sem.o $
+    $absl/synchronization/internal/waiter.o $
+    $absl/synchronization/notification.o $absl/synchronization/mutex.o
+build $absl/synchronization/barrier.o: cxx $absl/synchronization/barrier.cc
+  cxxflags = $third_party_cxxflags
+build $absl/synchronization/blocking_counter.o: cxx $
+    $absl/synchronization/blocking_counter.cc
+  cxxflags = $third_party_cxxflags
+build $absl/synchronization/internal/create_thread_identity.o: cxx $
+    $absl/synchronization/internal/create_thread_identity.cc
+  cxxflags = $third_party_cxxflags
+build $absl/synchronization/internal/per_thread_sem.o: cxx $
+    $absl/synchronization/internal/per_thread_sem.cc
+  cxxflags = $third_party_cxxflags
+build $absl/synchronization/internal/waiter.o: cxx $
+    $absl/synchronization/internal/waiter.cc
+  cxxflags = $third_party_cxxflags
+build $absl/synchronization/notification.o: cxx $
+    $absl/synchronization/notification.cc
+  cxxflags = $third_party_cxxflags
+build $absl/synchronization/mutex.o: cxx $absl/synchronization/mutex.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/synchronization:graphcycles_internal
+build $absl/synchronization/graphcycles_internal.a: ar $
+    $absl/synchronization/internal/graphcycles.o
+build $absl/synchronization/internal/graphcycles.o: cxx $
+    $absl/synchronization/internal/graphcycles.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/time
+build $absl/time/time.a: ar $absl/time/civil_time.o $absl/time/clock.o $
+    $absl/time/duration.o $absl/time/format.o $absl/time/absl/time.o
+build $absl/time/civil_time.o: cxx $absl/time/civil_time.cc
+  cxxflags = $third_party_cxxflags
+build $absl/time/clock.o: cxx $absl/time/clock.cc | $
+    $absl/time/internal/get_current_time_posix.inc
+  cxxflags = $third_party_cxxflags
+build $absl/time/duration.o: cxx $absl/time/duration.cc
+  cxxflags = $third_party_cxxflags
+build $absl/time/format.o: cxx $absl/time/format.cc
+  cxxflags = $third_party_cxxflags
+build $absl/time/absl/time.o: cxx $absl/time/time.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/time:civil_time
+build $absl/time/civil_time.a: ar $
+    $absl/time/internal/cctz/src/civil_time_detail.o
+build $absl/time/internal/cctz/src/civil_time_detail.o: cxx $
+    $absl/time/internal/cctz/src/civil_time_detail.cc
+  cxxflags = $third_party_cxxflags
+
+# //absl/time:time_zone
+build $absl/time/time_zone.a: ar $
+    $absl/time/internal/cctz/src/time_zone_fixed.o $
+    $absl/time/internal/cctz/src/time_zone_format.o $
+    $absl/time/internal/cctz/src/time_zone_if.o $
+    $absl/time/internal/cctz/src/time_zone_impl.o $
+    $absl/time/internal/cctz/src/time_zone_info.o $
+    $absl/time/internal/cctz/src/time_zone_libc.o $
+    $absl/time/internal/cctz/src/time_zone_lookup.o $
+    $absl/time/internal/cctz/src/time_zone_posix.o $
+    $absl/time/internal/cctz/src/zone_info_source.o
+build $absl/time/internal/cctz/src/time_zone_fixed.o: cxx $
+    $absl/time/internal/cctz/src/time_zone_fixed.cc
+  cxxflags = $third_party_cxxflags
+build $absl/time/internal/cctz/src/time_zone_format.o: cxx $
+    $absl/time/internal/cctz/src/time_zone_format.cc
+  cxxflags = $third_party_cxxflags
+build $absl/time/internal/cctz/src/time_zone_if.o: cxx $
+    $absl/time/internal/cctz/src/time_zone_if.cc
+  cxxflags = $third_party_cxxflags
+build $absl/time/internal/cctz/src/time_zone_impl.o: cxx $
+    $absl/time/internal/cctz/src/time_zone_impl.cc
+  cxxflags = $third_party_cxxflags
+build $absl/time/internal/cctz/src/time_zone_info.o: cxx $
+    $absl/time/internal/cctz/src/time_zone_info.cc
+  cxxflags = $third_party_cxxflags
+build $absl/time/internal/cctz/src/time_zone_libc.o: cxx $
+    $absl/time/internal/cctz/src/time_zone_libc.cc
+  cxxflags = $third_party_cxxflags
+build $absl/time/internal/cctz/src/time_zone_lookup.o: cxx $
+    $absl/time/internal/cctz/src/time_zone_lookup.cc
+  cxxflags = $third_party_cxxflags
+build $absl/time/internal/cctz/src/time_zone_posix.o: cxx $
+    $absl/time/internal/cctz/src/time_zone_posix.cc
+  cxxflags = $third_party_cxxflags
+build $absl/time/internal/cctz/src/zone_info_source.o: cxx $
+    $absl/time/internal/cctz/src/zone_info_source.cc
+  cxxflags = $third_party_cxxflags
+
+# // absl/types:bad_optional_access
+build $absl/types/bad_optional_access.a: ar $absl/types/bad_optional_access.o
+build $absl/types/bad_optional_access.o: cxx $absl/types/bad_optional_access.cc
+  cxxflags = $third_party_cxxflags
+
+# // absl/types:bad_variant_access
+build $absl/types/bad_variant_access.a: ar $absl/types/bad_variant_access.o
+build $absl/types/bad_variant_access.o: cxx $absl/types/bad_variant_access.cc
+  cxxflags = $third_party_cxxflags
+
+build third_party/date/src/tz.a: ar third_party/date/src/tz.o
+build third_party/date/src/tz.o: cxx third_party/date/src/tz.cpp
+  cxxflags = $third_party_cflags -DINSTALL=.
+
+build third_party/glew/src/glew.a: ar third_party/glew/src/glew.o
+build third_party/glew/src/glew.o: cc third_party/glew/src/glew.c
+  cflags = $third_party_cflags -DGLEW_EGL
+
+default glplanet
diff --git a/buildconf/dbg.ninja b/buildconf/dbg.ninja
new file mode 100644
index 0000000..b43df19
--- /dev/null
+++ b/buildconf/dbg.ninja
@@ -0,0 +1,20 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+third_party_cflags = -Og -g3
+
+cxxflags = -Og -g3 -Werror
+third_party_cxxflags = -Og -g3
+
+subninja buildconf/common.ninja
diff --git a/buildconf/fastbuild.ninja b/buildconf/fastbuild.ninja
new file mode 100644
index 0000000..c321e30
--- /dev/null
+++ b/buildconf/fastbuild.ninja
@@ -0,0 +1,17 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+cxxflags = -Werror
+
+subninja buildconf/common.ninja
diff --git a/buildconf/release.ninja b/buildconf/release.ninja
new file mode 100644
index 0000000..8f5dd1b
--- /dev/null
+++ b/buildconf/release.ninja
@@ -0,0 +1,29 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+third_party_cflags = -Werror=format -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -O3 -DNDEBUG -fstack-protector-strong -ffunction-sections -fdata-sections -flto
+
+# Don't set -Werror in general; we don't want to risk future warnings appearing
+# in GCC's -Wall/-Wextra and breaking the build.
+#
+# Most of these flags come from Debian's dpkg-buildflags, with the exception
+# that we aim for correctness with -O3, rather than just -O2.
+cxxflags = -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -O3 -DNDEBUG -DGLPLANET_DISABLE_EGL_THREAD_SAFETY_CHECKS -DGLPLANET_DISABLE_GL_THREAD_SAFETY_CHECKS -DGLPLANET_DISABLE_AGGRESSIVE_ERROR_CHECKING -fstack-protector-strong -ffunction-sections -fdata-sections 
+#-flto
+third_party_cxxflags = -D_FORTIFY_SOURCE=2 -O3 -DNDEBUG -fstack-protector-strong -ffunction-sections -fdata-sections
+#-flto
+
+ldflags = -flto -Wl,-O2 -Wl,-z,relro -Wl,--gc-sections -Wl,--as-needed
+
+subninja buildconf/common.ninja