if (varonce26) {
var27 = varonce26;
} else {
-var28 = "-DWITH_LIBGC";
-var29 = 12;
+var28 = "-DWITH_LIBGC `pkg-config --cflags bdw-gc` ";
+var29 = 42;
var30 = string__NativeString__to_s_with_length(var28, var29);
var27 = var30;
varonce26 = var27;
if (varonce70) {
var71 = varonce70;
} else {
-var72 = "\nLDFLAGS ?= \nLDLIBS ?= -lm -lgc ";
-var73 = 33;
+var72 = "\nLDFLAGS ?= \nLDLIBS ?= -lm `pkg-config --libs bdw-gc`";
+var73 = 55;
var74 = string__NativeString__to_s_with_length(var72, var73);
var71 = var74;
varonce70 = var71;