From fde7b5fb7adbfd2c49e503259e3c928f4de3f9a9 Mon Sep 17 00:00:00 2001
From: Nick Markwell <nick@duckinator.net>
Date: Sun, 17 Jun 2012 10:08:03 -0400
Subject: [PATCH] Add `LIBGC_FORCE_COMPILE=true` flag.

This forces it to compile libgc. Useful in cases where the system libgc
does not work as it should. (I ran into this problem on ArchLinux. Not
sure what happened.)
---
 Makefile      | 2 +-
 libs/Makefile | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 6e6e8556..ec9a6b12 100644
--- a/Makefile
+++ b/Makefile
@@ -56,7 +56,7 @@ prepare_bootstrap:
 	@echo "Done!"
 
 boehmgc:
-	cd libs && $(MAKE)
+	cd libs && $(MAKE) LIBGC_FORCE_COMPILE=${LIBGC_FORCE_COMPILE}
 
 # For c-source based rock releases, 'make bootstrap' will compile a version
 # of rock from the C sources in build/, then use that version to re-compile itself
diff --git a/libs/Makefile b/libs/Makefile
index 9f64a08e..aa2da665 100644
--- a/libs/Makefile
+++ b/libs/Makefile
@@ -54,6 +54,10 @@ GC_PREFIX?=$(shell pkg-config --variable=libdir bdw-gc)
 LIBGC_PRESENT=$(wildcard ${GC_PREFIX}/libgc.a)
 LIBGC_SUPPORTS_THREADS=$(shell nm $(wildcard ${GC_PREFIX}/libgc.a) | grep GC_pthread_create)
 
+ifneq (${LIBGC_FORCE_COMPILE},)
+  LIBGC_PRESENT=
+endif
+
 all:
 	mkdir -p ${GC_PATH}
 ifneq (${LIBGC_PRESENT},)