Squashed 'external/toxcore/c-toxcore/' content from commit 67badf69

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 67badf69416a74e74f6d7eb51dd96f37282b8455

.github/scripts/flags.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+add_config_flag() { CONFIG_FLAGS+=("$@"); }
+add_c_flag() { C_FLAGS="$C_FLAGS $@"; }
+add_cxx_flag() { CXX_FLAGS="$CXX_FLAGS $@"; }
+add_ld_flag() { LD_FLAGS="$LD_FLAGS $@"; }
+add_flag() {
+  add_c_flag "$@"
+  add_cxx_flag "$@"
+}
+
+# Our own flags which we can insert in the correct place. We don't use CFLAGS
+# and friends here (we unset them below), because they influence config tests
+# such as ./configure and cmake tests. Our warning flags break those tests, so
+# we can't add them globally here.
+CONFIG_FLAGS=()
+C_FLAGS=""
+CXX_FLAGS=""
+LD_FLAGS=""
+
+unset CFLAGS
+unset CXXFLAGS
+unset CPPFLAGS
+unset LDFLAGS
+
+# Optimisation flags.
+add_flag -O3 -march=native
+
+# Warn on non-ISO C.
+add_c_flag -pedantic
+add_c_flag -std=c99
+add_cxx_flag -std=c++11
+
+add_flag -g3
+add_flag -ftrapv