abstract out compiler runtime library for linking libc.so
this allows config.mak to override the default -lgcc for building with
other compilers such as pcc/clang/etc.
diff --git a/Makefile b/Makefile
index 0c13417..ad701c9 100644
--- a/Makefile
+++ b/Makefile
@@ -23,6 +23,7 @@
IMPH = src/internal/stdio_impl.h src/internal/pthread_impl.h src/internal/libc.h
LDFLAGS =
+LIBCC = -lgcc
CPPFLAGS =
CFLAGS = -Os -pipe
CFLAGS_C99FSE = -std=c99 -ffreestanding -nostdinc
@@ -91,7 +92,7 @@
lib/libc.so: $(LOBJS)
$(CC) $(CFLAGS_ALL_SHARED) $(LDFLAGS) -nostdlib -shared \
-Wl,-e,_start -Wl,-Bsymbolic-functions \
- -Wl,-soname=libc.so -o $@ $(LOBJS) -lgcc
+ -Wl,-soname=libc.so -o $@ $(LOBJS) $(LIBCC)
lib/libc.a: $(OBJS)
rm -f $@