Update build for linux

build.sh

@@ -1,10 +1,21 @@
 #!/usr/bin/bash
 
-mkdir build
+for arg in "$@"; do declare $arg='1'; done
+if [ ! -v release ]; then debug=1;                fi
+if [ -v debug ];     then echo "[debug build]";   fi
+if [ -v release ];   then echo "[release build]"; fi
+if [ -v slow ];      then echo "[slow build]";    fi
+
+mkdir -p build
 cd build
 
-FLAGS="-Wall -Wno-missing-braces -Wno-writable-strings -nostdlib++ -fsanitize=address -fno-exceptions -fdiagnostics-absolute-paths -g -I../src -DDEBUG_BUILD=1"
-I="-I../src/external/SDL/include -I../src/external/lua/src -I../src/external/glad"
-clang -o te $FLAGS ../src/text_editor/text_editor.cpp $I -lSDL3 -lm -lbacktrace
+I="-I../src/external/SDL/include -I../src/external/lua/src -I../src/external/glad -I../src"
+flags="-Wall -Wextra -Werror -Wformat=2 -Wundef -Wshadow -Wno-missing-field-initializers -Wno-missing-braces -Wno-writable-strings \
+    -g -fdiagnostics-absolute-paths \
+    -nostdlib++ -fno-exceptions"
 
-# -v -Wl,--verbose
+if [ -v debug ];   then flags="$flags -fsanitize=address,undefined -fno-omit-frame-pointer -DDEBUG_BUILD=1"; fi
+if [ -v release ]; then flags="$flags -DDEBUG_BUILD=0 -O2";                                                  fi
+if [ -v slow ];    then flags="$flags -DSLOW_BUILD=1";                                                       fi
+
+time clang -o te $flags ../src/text_editor/text_editor.cpp $I -lSDL3 -lm -lbacktrace