1 files changed, 50 insertions, 0 deletions
diff --git a/bs/bs-lib.sh b/bs/bs-lib.sh
new file mode 100644
index 000000000..8b13653f2
--- /dev/null
+++ b/bs/bs-lib.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+# common shell functions and variable setup for the bs build system,
+# expect variables to be set and exported in bs.mk
+
+test -z "$CC" && CC=cc
+test -z "$CPP" && CPP='cc -E'
+test -z "$PKGCONFIG" && PKGCONFIG=pkg-config
+
+p ()
+{
+	echo >&2 "$@"
+}
+
+run_cc ()
+{
+	$CC $CPPFLAGS $CFLAGS $LDFLAGS \
+		$cppflags $cflags $ldflags -o t.o t.c >/dev/null 2>&1
+}
+
+test_header ()
+{
+	cat > t.c <<EOF
+#include <$1.h>
+int main (void) { return 0; }
+EOF
+	run_cc
+}
+
+dep_paths ()
+{
+	name=$1
+	eval "cflags=`echo '$'`${name}_cflags"
+	eval "ldflags=`echo '$'`${name}_ldflags"
+	eval "pfx=`echo '$'`${name}_pfx"
+	if test -n "$pfx"; then
+		cflags="$cflags -I$pfx/include"
+		ldflags="$ldflags -L$pfx/lib"
+	fi
+}
+
+test_compile ()
+{
+	h=shift
+	cat > t.c <<EOF
+#include <$h.h>
+int main () { $@ return 0; }
+EOF
+	run_cc
+}
+