Set up build system

Create a trivial C++ program and make it buildable via Ninja.

Reviewed-by: Alex Chernyakhovsky <achernya@google.com>

9 files changed, 155 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7ad1c3c
--- /dev/null
+++ b/.gitignore
@@ -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.
+
+*.o
+.ninja_*
+gsrsup
diff --git a/README.md b/README.md
index ca640a3..a3eb51f 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,16 @@ object once its upload has completed. If you run
 twice, the second invocation will skip uploading altogether and only run the
 integrity-checking code.
 
+## Building
+
+`gsrsup` builds using a handwritten [Ninja](https://ninja-build.org/) file.
+Simply run `ninja` to create a development build. You can also run Ninja with a
+custom build file to request a different profile:
+
+  - `ninja -f buildconf/asan.ninja`: Build with AddressSanitizer.
+  - `ninja -f buildconf/dbg.ninja`: Build for debugging.
+  - `ninja -f buildconf/release.ninja`: Build with optimizations.
+
 ---
 
 This is not an official Google product.
diff --git a/build.ninja b/build.ninja
new file mode 120000
index 0000000..d4e407e
--- /dev/null
+++ b/build.ninja
@@ -0,0 +1 @@
+buildconf/fastbuild.ninja
\ No newline at end of file
diff --git a/buildconf/asan.ninja b/buildconf/asan.ninja
new file mode 100644
index 0000000..dc9f1d8
--- /dev/null
+++ b/buildconf/asan.ninja
@@ -0,0 +1,19 @@
+# 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 -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..82223b0
--- /dev/null
+++ b/buildconf/common.ninja
@@ -0,0 +1,34 @@
+# 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.
+
+ninja_required_version = 1.3
+
+cxx = c++
+cxxflags = -std=c++17 -Wall -Wextra -fno-exceptions $
+    -fno-asynchronous-unwind-tables -fno-rtti -pipe $cxxflags
+
+rule cxx
+  command = $cxx -MD -MT $out -MF $out.d $cxxflags -c $in -o $out
+  description = CXX $out
+  depfile = $out.d
+  deps = gcc
+
+rule link
+  command = $cxx $ldflags -o $out $in $libs
+  description = LINK $out
+
+build gsrsup.o: cxx gsrsup.cc
+build gsrsup: link gsrsup.o
+
+default gsrsup
diff --git a/buildconf/dbg.ninja b/buildconf/dbg.ninja
new file mode 100644
index 0000000..7f92cd5
--- /dev/null
+++ b/buildconf/dbg.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 -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..a4ccfe1
--- /dev/null
+++ b/buildconf/release.ninja
@@ -0,0 +1,25 @@
+# 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.
+
+# 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 -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
diff --git a/gsrsup.cc b/gsrsup.cc
new file mode 100644
index 0000000..b48b033
--- /dev/null
+++ b/gsrsup.cc
@@ -0,0 +1,15 @@
+// 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.
+
+int main() {}