feat: add CFLAGS support

leaf

@@ -19,6 +19,10 @@ fi
 export MAKEFLAGS="-j${PARALLEL_JOBS}"
 export NINJAJOBS="${PARALLEL_JOBS}"
 export LC_ALL=C
+export leaf_flags="CFLAGS CXXFLAGS FCFLAGS FFLAGS RUSTFLAGS"
+for flag in ${leaf_flags}; do
+  export $flag
+done
 
 declare -A BUILD_OPTIONS
 BUILD_OPTIONS=([strip]="0" [libtool]="0" [zipman]="0")
@@ -80,6 +84,12 @@ main() {
   fi
 }
 
+leaf_clear_flags() {
+  for flag in $leaf_flags; do
+    unset $flag
+  done
+}
+
 leaf_check_directories() {
   if [ -z "${BUILD_DIR}" ]; then
     leaf_error "Directory \${BUILD_DIR} must be existed"

leaf.conf

@@ -15,3 +15,11 @@ COMPRESS_PROG="zstd -19 -T0"
 BINARY_EXT=".pkg.tar.zst"
 
 ENABLE_DEBUG_TREE="true"
+
+COMMON_FLAGS="-pipe"
+CFLAGS="${COMMON_FLAGS}"
+CXXFLAGS="${COMMON_FLAGS}"
+FCFLAGS="${COMMON_FLAGS}"
+FFLAGS="${COMMON_FLAGS}"
+
+RUSTFLAGS="${RUSTFLAGS} -C target-cpu=native"